201
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Abstract
Although significant advances have been achieved in dynamic reversible covalent and non-covalent bonding chemistries for self-healing polymers, an ultimate goal is to create high strength and stiffness commodity materials capable of repair without intervention under ambient conditions. Here we report the development of mechanically robust thermoplastic polyurethane fibers and films capable of autonomous self-healing under ambient conditions. Two mechanisms of self-healing are identified: viscoelastic shape memory (VESM) driven by conformational entropic energy stored during mechanical damage, and surface energy/tension that drives the reduction of newly generated surface areas created upon damage by shallowing and widening wounds until healed. The type of self-healing mechanism is molecular weight dependent. To the best of our knowledge these materials represent the strongest (Sf = 21 mN/tex, or σf ≈ 22 MPa) and stiffest (J = 300 mN/tex, or E ≈ 320 MPa) self-healing polymers able to repair under typical ambient conditions without intervention. Since two autonomous self-healing mechanisms result from viscoelastic behavior not specific to a particular polymer chemistry, they may serve as general approaches to design of other self-repairing commodity polymers.
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Affiliation(s)
- Chris C Hornat
- Department of Materials Science and Engineering, Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, Clemson, SC, 29634, USA
| | - Marek W Urban
- Department of Materials Science and Engineering, Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, Clemson, SC, 29634, USA.
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202
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Li X, Koh KH, Farhan M, Lai KWC. An ultraflexible polyurethane yarn-based wearable strain sensor with a polydimethylsiloxane infiltrated multilayer sheath for smart textiles. Nanoscale 2020; 12:4110-4118. [PMID: 32022071 DOI: 10.1039/c9nr09306k] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Waterproof fiber-based strain sensors with a high gauge factor and outstanding stability are essential for smart textiles, wearable devices and biomedical electronics. In this work, we demonstrate a highly flexible, stretchable, sensitive, and waterproof core-sheath structure strain sensor with a relatively wide strain-sensing range fabricated by a simple approach. Such a core-sheath structure is composed of a superelastic core material polyurethane (PU) yarn; a highly conductive multilayer sheath material, namely, graphene nanosheets/thin gold film/graphene nanosheets (GNSs/Au/GNSs); and a thin polydimethylsiloxane (PDMS) wrapping layer. The combination of the PU yarn, multilayer GNSs/Au/GNSs, and PDMS wrapping layer enables the strain sensor to achieve high flexibility and stretchability, high sensitivity, broad strain-sensing range, and good waterproof property simultaneously due to the infiltration of PDMS into the multilayer during stretching. Particularly, the yarn strain sensor exhibits a high gauge factor (GF: 661.59), outstanding stability with an applied strain of 50% for approximately 10 000 stretch/release cycles, and superior water resistance. Moreover, it can be readily integrated into textiles, including medical textile bandages and textile gloves, for monitoring various human motions (e.g., phonation, pulse, finger bending, and walking) and effectively control a hand robot. Therefore, strain sensors show considerable potential in textile, wearable, and biomedical electronics for healthcare-related applications, such as disease diagnosis, preventive healthcare, and rehabilitation care, and robot controlling-related applications (e.g., controlling a hand robot to catch some objects).
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Affiliation(s)
- Xiaoting Li
- Department of Biomedical Engineering, Centre for Robotics and Automation, City University of Hong Kong, Kowloon Tong, Hong Kong.
| | - Keng Huat Koh
- Department of Biomedical Engineering, Centre for Robotics and Automation, City University of Hong Kong, Kowloon Tong, Hong Kong.
| | - Musthafa Farhan
- Department of Biomedical Engineering, Centre for Robotics and Automation, City University of Hong Kong, Kowloon Tong, Hong Kong.
| | - King Wai Chiu Lai
- Department of Biomedical Engineering, Centre for Robotics and Automation, City University of Hong Kong, Kowloon Tong, Hong Kong.
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203
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Nosrati R, Kiani G, Karimzad Ghavidel A, Rashidi A. Improving environmental protection of waterborne polyurethane coating by adding TiO 2/polyaniline/HNT/CNT nanocomposite. Environ Sci Pollut Res Int 2020; 27:6438-6448. [PMID: 31873879 DOI: 10.1007/s11356-019-07333-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Accepted: 12/06/2019] [Indexed: 06/10/2023]
Abstract
Nanostructures of titanium dioxide, polyaniline, halloysite, and carbon nanotubes have an excellent effect to improve environmental protection and surface properties of coatings like anticorrosion and self-cleaning attributes. In this research, we studied the individual effect of adding each nanostructure within the polyurethane matrix and also all nanostructure combinations with each other on the mentioned properties. To reach this aim, the polyurethane nanocomposites were prepared; then, anticorrosion and self-cleaning tests were carried out on the samples. FTIR spectroscopy and FESEM images were used to characterize the nanocomposite additives and coating influence. According to the obtained results, the polyurethane coating modified with titanium dioxide/polyaniline/halloysite nanotube/carbon nanotube nanocomposite showed very higher corrosion potential and resistance and lower corrosion current in the comparison with other coatings. Also, the mentioned polyurethane nanocomposite coating showed good hydrophilicity and it decolorized a dye contaminant with high efficiency which makes them appropriate candidate for the protection of the substrate against environmental destructive factors.
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Affiliation(s)
- Rahimeh Nosrati
- Department of Emerging Technologies Engineering, Faculty of electrical and computer engineering, University of Tabriz, Tabriz, 5166616471, Iran
| | - Gholamreza Kiani
- Department of Emerging Technologies Engineering, Faculty of electrical and computer engineering, University of Tabriz, Tabriz, 5166616471, Iran.
| | - Ayub Karimzad Ghavidel
- Department of Engineering Science, Faculty of Tabriz, Tabriz Branch, Technical and Vocational University (TVU), Tabriz, Iran
| | - Ali Rashidi
- Department of Emerging Technologies Engineering, Faculty of electrical and computer engineering, University of Tabriz, Tabriz, 5166616471, Iran
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204
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Yan S, Napiwocki B, Xu Y, Zhang J, Zhang X, Wang X, Crone WC, Li Q, Turng LS. Wavy small-diameter vascular graft made of eggshell membrane and thermoplastic polyurethane. Mater Sci Eng C Mater Biol Appl 2020; 107:110311. [PMID: 31761197 PMCID: PMC6905500 DOI: 10.1016/j.msec.2019.110311] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 09/17/2019] [Accepted: 10/12/2019] [Indexed: 12/17/2022]
Abstract
In this study, a small-diameter, double-layered eggshell membrane/thermoplastic polyurethane (ESM/TPU) vascular graft with a wavy structure was developed. The avian eggshell membrane, a fibrous structure similar to the extracellular matrix (ECM), has the potential to yield rapid endothelialization in vitro. The dopamine and heparin modification of the ESM surface not only promoted human umbilical vein endothelial cell (HUVEC) proliferation via cytocompatibility assessment, but also improved its anticoagulation properties as verified in platelet adhesion tests. The biomimetic mechanical properties of the vascular graft were provided by the elastic TPU fibers via electrospinning using a wavy cross-section rotating collector. The advantage of combining these two materials is to make use of the bioactivity of ESM as the internal membrane and the tunable mechanical properties of TPU as the external layer. The circumferentially wavy structure of the vascular graft produced a toe region in the non-linear section of the stress-strain curve similar to that of natural blood vessels. The ESM/TPU graft's circumferential ultimate strength was 2.57 MPa, its strain was 339% mm/mm, and its toe region was found to be around 20% mm/mm. Cyclical tension tests showed that the vascular graft could maintain good mechanical properties and showed no structural damage under repeated extension tests.
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Affiliation(s)
- Shujie Yan
- School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou, China; National Center for International Research of Micro-Nano Molding Technology Zhengzhou University, Zhengzhou, China; Polymer Engineering Center, Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI, USA; Wisconsin Institute for Discovery University of Wisconsin-Madison, Madison, WI, USA
| | - Brett Napiwocki
- Wisconsin Institute for Discovery University of Wisconsin-Madison, Madison, WI, USA
| | - Yiyang Xu
- School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou, China; National Center for International Research of Micro-Nano Molding Technology Zhengzhou University, Zhengzhou, China; Polymer Engineering Center, Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI, USA; Wisconsin Institute for Discovery University of Wisconsin-Madison, Madison, WI, USA
| | - Jue Zhang
- Morgridge Institute for Research, Madison, WI, USA
| | - Xiang Zhang
- School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou, China; National Center for International Research of Micro-Nano Molding Technology Zhengzhou University, Zhengzhou, China
| | - Xiaofeng Wang
- School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou, China; National Center for International Research of Micro-Nano Molding Technology Zhengzhou University, Zhengzhou, China
| | - Wendy C Crone
- Wisconsin Institute for Discovery University of Wisconsin-Madison, Madison, WI, USA
| | - Qian Li
- School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou, China; National Center for International Research of Micro-Nano Molding Technology Zhengzhou University, Zhengzhou, China.
| | - Lih-Sheng Turng
- Polymer Engineering Center, Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI, USA; Wisconsin Institute for Discovery University of Wisconsin-Madison, Madison, WI, USA.
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205
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Chiang HY, Pan J, Ma C, Qian PY. Combining a bio-based polymer and a natural antifoulant into an eco-friendly antifouling coating. Biofouling 2020; 36:200-209. [PMID: 32253933 DOI: 10.1080/08927014.2020.1749270] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 03/23/2020] [Accepted: 03/24/2020] [Indexed: 06/11/2023]
Abstract
Biodegradable polymers are promising binders and carriers for natural antifoulants. In the present study, an antifouling (AF) coating was developed by adding a non-toxic AF compound (butenolide) to a bio-based and biodegradable poly(lactic acid)-based polyurethane. Mass loss measurement showed that the polymer degraded in seawater at a rate of 0.013 mg cm-2 day-1. Measurements showed that butenolide was released from the coatings into seawater over a period of at least three months. Both the concentration of butenolide in the coatings and the ambient temperature determined the release rate of butenolide. The results further demonstrate that incorporating rosin into the coatings increase the self-renewal rate of the polymer and facilitated the long-term release of butenolide from the coating. The results show that poly(lactic acid)-based polyurethane is a suitable polymer for butenolide-based AF coatings.
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Affiliation(s)
- Ho Yin Chiang
- Department of Ocean Science, Division of Life Science and Hong Kong Branch of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), The Hong Kong University of Science & Technology, Hong Kong, China
| | - Jiansen Pan
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou, China
| | - Chunfeng Ma
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou, China
| | - Pei-Yuan Qian
- Department of Ocean Science, Division of Life Science and Hong Kong Branch of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), The Hong Kong University of Science & Technology, Hong Kong, China
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206
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Hosseini Salekdeh SS, Daemi H, Zare-Gachi M, Rajabi S, Bazgir F, Aghdami N, Nourbakhsh MS, Baharvand H. Assessment of the Efficacy of Tributylammonium Alginate Surface-Modified Polyurethane as an Antibacterial Elastomeric Wound Dressing for both Noninfected and Infected Full-Thickness Wounds. ACS Appl Mater Interfaces 2020; 12:3393-3406. [PMID: 31874022 DOI: 10.1021/acsami.9b18437] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Risk factors of nonhealing wounds include persistent bacterial infections and rapid onset of dehydration; therefore, wound dressings should be used to accelerate the healing process by helping to disinfect the wound bed and provide moisture. Herein, we introduce a transparent tributylammonium alginate surface-modified cationic polyurethane (CPU) wound dressing, which is appropriate for full-thickness wounds. We studied the physicochemical properties of the dressing using Fourier transform infrared, 1H NMR, and 13C NMR spectroscopies and scanning electron microscopy, energy-dispersive X-ray, and thermomechanical analyses. The surface-modified polyurethane demonstrated improved hydrophilicity and tensile Young's modulus that approximated natural skin, which was in the range of 1.5-3 MPa. Cell viability and in vitro wound closure, assessed by MTS and the scratch assay, confirmed that the dressing was cytocompatible and possessed fibroblast migratory-promoting activity. The surface-modified CPU had up to 100% antibacterial activity against Staphylococcus aureus and Escherichia coli as Gram-positive and Gram-negative bacteria, respectively. In vivo assessments of both noninfected and infected wounds revealed that the surface-modified CPU dressing resulted in a faster healing rate because it reduced the persistent inflammatory phase, enhanced collagen deposition, and improved the formation of mature blood vessels when compared with CPU and commercial Tegaderm wound dressing.
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Affiliation(s)
| | | | | | | | | | | | - Mohammad Sadegh Nourbakhsh
- Biomaterial Group, Faculty of New Sciences and Technologies , Semnan University , 35131-19111 Semnan , Iran
| | - Hossein Baharvand
- Department of Developmental Biology , University of Science and Culture , 13145-871 Tehran , Iran
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207
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Neves AR, Almeida JR, Carvalhal F, Câmara A, Pereira S, Antunes J, Vasconcelos V, Pinto M, Silva ER, Sousa E, Correia-da-Silva M. Overcoming environmental problems of biocides: Synthetic bile acid derivatives as a sustainable alternative. Ecotoxicol Environ Saf 2020; 187:109812. [PMID: 31669574 DOI: 10.1016/j.ecoenv.2019.109812] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 10/10/2019] [Accepted: 10/12/2019] [Indexed: 06/10/2023]
Abstract
Marine biofouling represents a global economic and ecological challenge. Some marine organisms produce bioactive metabolites, such as steroids, that inhibit the settlement and growth of fouling organisms. The aim of this work was to explore bile acids as a new scaffold with antifouling (AF) activity by using chemical synthesis to produce a series of bile acid derivatives with optimized AF performance and understand their structure-activity relationships. Seven bile acid derivatives were successfully synthesized in moderate to high yields, and their structures were elucidated through spectroscopic methods. Their AF activities were tested against both macro- and microfouling communities. The most potent bile acid against the settlement of Mytilus galloprovincialis larvae was the methyl ester derivative of cholic acid (10), which showed an EC50 of 3.7 μM and an LC50/EC50 > 50 (LC50 > 200 μM) in AF effectiveness vs toxicity studies. Two derivatives of deoxycholic acid (5 and 7) potently inhibited the growth of biofilm-forming marine bacteria with EC50 values < 10 μM, and five bile acids (1, 5, and 7-9) potently inhibited the growth of diatoms, showing EC50 values between 3 and 10 μM. Promising AF profiles were achieved with some of the synthesized bile acids by combining antimacrofouling and antimicrofouling activities. Initial studies on the incorporation of one of these promising bile acid derivatives in polymeric coatings, such as a marine paint, demonstrated the ability of these compounds to generate coatings with antimacrofouling activity.
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Affiliation(s)
- Ana R Neves
- CIIMAR/CIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General, Norton de Matos S/N, 4450-208, Matosinhos, Portugal; Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - Joana R Almeida
- CIIMAR/CIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General, Norton de Matos S/N, 4450-208, Matosinhos, Portugal
| | - Francisca Carvalhal
- CIIMAR/CIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General, Norton de Matos S/N, 4450-208, Matosinhos, Portugal; Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - Amadeu Câmara
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - Sandra Pereira
- CIIMAR/CIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General, Norton de Matos S/N, 4450-208, Matosinhos, Portugal
| | - Jorge Antunes
- CIIMAR/CIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General, Norton de Matos S/N, 4450-208, Matosinhos, Portugal; Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4069-007, Porto, Portugal
| | - Vitor Vasconcelos
- CIIMAR/CIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General, Norton de Matos S/N, 4450-208, Matosinhos, Portugal; Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4069-007, Porto, Portugal
| | - Madalena Pinto
- CIIMAR/CIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General, Norton de Matos S/N, 4450-208, Matosinhos, Portugal; Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - Elisabete R Silva
- BioISI - Biosystems & Integrative Sciences Institute, Faculdade de Ciências, Universidade de Lisboa, Campo Grande C8 bdg, Lisboa, 1749-016 Portugal; CERENA - Centro de Recursos Naturais e Ambiente, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1, 1049-001, Lisboa, Portugal
| | - Emília Sousa
- CIIMAR/CIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General, Norton de Matos S/N, 4450-208, Matosinhos, Portugal; Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - Marta Correia-da-Silva
- CIIMAR/CIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General, Norton de Matos S/N, 4450-208, Matosinhos, Portugal; Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal.
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208
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Lin B, Yuen ACY, Li A, Zhang Y, Chen TBY, Yu B, Lee EWM, Peng S, Yang W, Lu HD, Chan QN, Yeoh GH, Wang CH. MXene/chitosan nanocoating for flexible polyurethane foam towards remarkable fire hazards reductions. J Hazard Mater 2020; 381:120952. [PMID: 31400715 DOI: 10.1016/j.jhazmat.2019.120952] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 07/17/2019] [Accepted: 07/30/2019] [Indexed: 06/10/2023]
Abstract
MXene/chitosan nanocoating for flexible polyurethane foam (PUF) was prepared via layer-by-layer (LbL) approach. MXene (Ti3C2) ultra-thin nanosheets were obtained through etching process of Ti3AlC2 followed by exfoliation. The deposition of MXene/chitosan nanocoating was conducted by alternatingly immersing the PUF into a chitosan solution and a Ti3C2 aqueous dispersion, which resulted in different number of bilayers (BL) ranging from 2, 5 and 8. Owing to the utilization of ultra-thin Ti3C2 nanosheets, the weight gain was only 6.9% for 8 BL coating of PUF, which minimised the unfavourable impact on the intrinsic properties of PUF. The Ti3C2/chitosan coating significantly reduced the flammability and smoke releases of PUF. Compared with unmodified PUF, the 8 BL coating reduced the peak heat release rate by 57.2%, alongside with a 65.5% reduction in the total heat release. The 8 BL coating also showed outstanding smoke suppression ability with total smoke release decreased by 71.1% and peak smoke production rate reduced by 60.3%, respectively. The peak production of CO and CO2 gases also decreased by 70.8% and 68.6%, respectively. Furthermore, an outstanding char formation performance of 37.2 wt.% residue was obtained for 8 BL coated PUF, indicating the excellent barrier and carbonization property of the hybrid coating.
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Affiliation(s)
- Bo Lin
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Anthony Chun Yin Yuen
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Ao Li
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Yang Zhang
- Department of Chemical and Materials Engineering, Hefei University, 99 Jinxiu Avenue, Hefei, Anhui, 230601, China
| | - Timothy Bo Yuan Chen
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Bin Yu
- Department of Architecture and Civil Engineering, City University of Hong Kong, 88 Tat Chee Avenue, Kowloon, Hong Kong, China.
| | - Eric Wai Ming Lee
- Department of Architecture and Civil Engineering, City University of Hong Kong, 88 Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Shuhua Peng
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Wei Yang
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia; Department of Chemical and Materials Engineering, Hefei University, 99 Jinxiu Avenue, Hefei, Anhui, 230601, China.
| | - Hong-Dian Lu
- Department of Chemical and Materials Engineering, Hefei University, 99 Jinxiu Avenue, Hefei, Anhui, 230601, China
| | - Qing Nian Chan
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Guan Heng Yeoh
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Chun H Wang
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia
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209
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Kumar R, Kang CU, Mohan D, Khan MA, Lee JH, Lee SS, Jeon BH. Waste sludge derived adsorbents for arsenate removal from water. Chemosphere 2020; 239:124832. [PMID: 31726524 DOI: 10.1016/j.chemosphere.2019.124832] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 09/05/2019] [Accepted: 09/09/2019] [Indexed: 06/10/2023]
Abstract
Aqueous arsenate [As(V)] was removed using an aluminum-based adsorbent (ABA) and coal mine drainage sludge coated polyurethane (CMDS-PU) prepared using alum and coal mine sludge, respectively. Their As(V) removal efficiencies were compared with each other and granular ferric hydroxide (GFH). The mineralogy and surface chemistry of materials were determined using wavelength dispersive X-ray fluorescence (WD XRF) and Fourier transform infrared spectroscopy (FTIR), respectively. The angle-resolved X-ray photoelectron spectroscopy (AR-XPS) studies confirmed As(V) retention on the adsorbent surfaces. The adsorption kinetics data were fitted to pseudo second-order rate equation. The faster As(V) uptake kinetics of GFH and ABA (GFH > ABA > CMDS-PU) were attributed to their large pore volume and mesoporous nature. Langmuir adsorption capacities of 22, 31 and 10 mg/g, were achieved for GFH, ABA and CMDS-PU, respectively. As(V) adsorption on GFH, ABA and CMDS-PU was endothermic. GFH and ABA were efficient over a wide pH range (3-10). In column studies, GFH, ABA, and CMDS-PU successfully treated 23625, 842, and 158 bed volumes (BVs) and 2094, 6400, and 17 BVs of As(V)-contaminated water with 9.5 and 27 EBCT, respectively (at pH = 6.0, Asi = 600 μg/L). The GFH and ABA have a potential to be used at large-scale aqueous phase As(V) remediation.
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Affiliation(s)
- Rahul Kumar
- Department of Earth Resources and Environmental Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea; School of Environmental Sciences (SES), Jawaharlal Nehru University (JNU), New Delhi, 110067, India; Department of Chemistry & Centre for Bio-Nanotechnology (COBS & H), CCS Haryana Agricultural University, Hisar, 125004, India
| | - Chan-Ung Kang
- Department of Earth Resources and Environmental Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea
| | - Dinesh Mohan
- School of Environmental Sciences (SES), Jawaharlal Nehru University (JNU), New Delhi, 110067, India
| | - Moonis Ali Khan
- Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Joon-Hak Lee
- Department of Earth Resources and Environmental Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea
| | - Sean S Lee
- Department of Earth Resources and Environmental Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea.
| | - Byong-Hun Jeon
- Department of Earth Resources and Environmental Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea.
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210
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Abstract
In this chapter, protocols and details for the immobilization of a model cell onto polyurethane foam carriers are provided in order to facilitate the use of such systems in laboratory or industrial reactors. Polyurethane foam has recently acquired great relevance as a carrier for its good mechanical properties, high porosity, and large adsorption surface. In addition, it has a very low commercial cost. Two different immobilization protocols have been described, differing in the flow regime or the possibilities for the reactor: immobilization in a stirred tank reactor working in a discontinuous regime (by cycles) and immobilization in a packed column working in continuous operation mode. Protocols for carrier sterilization, analytical methodology, and immobilization are described.
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Affiliation(s)
- Ignacio de Ory
- Department of Chemical Engineering and Food Technology, Faculty of Sciences, University of Cadiz, Cadiz, Spain
| | - Gema Cabrera
- Department of Chemical Engineering and Food Technology, Faculty of Sciences, University of Cadiz, Cadiz, Spain
| | - Martin Ramirez
- Department of Chemical Engineering and Food Technology, Faculty of Sciences, University of Cadiz, Cadiz, Spain
| | - Ana Blandino
- Department of Chemical Engineering and Food Technology, Faculty of Sciences, University of Cadiz, Cadiz, Spain.
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211
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Tao ZW, Wu S, Cosgriff-Hernandez EM, Jacot JG. Evaluation of a polyurethane-reinforced hydrogel patch in a rat right ventricle wall replacement model. Acta Biomater 2020; 101:206-218. [PMID: 31654774 PMCID: PMC6960327 DOI: 10.1016/j.actbio.2019.10.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/30/2019] [Accepted: 10/18/2019] [Indexed: 12/16/2022]
Abstract
Congenital heart defects affect about 1% births in the United States. Many of the defects are treated with surgically implanted patches made from inactive materials or fixed pericardium that do not grow with the patients, leading to an increased risk of arrhythmia, sudden cardiac death, and heart failure. This study investigated an angiogenic poly(ethylene glycol) fibrin-based hydrogel reinforced with an electrospun biodegradable poly(ether ester urethane) urea (BPUR) mesh layer that was designed to encourage cell invasion, angiogenesis, and regenerative remodeling in the repair of an artificial defect created onto the rat right ventricle wall. Electrocardiogram signals were analyzed, heart function was measured, and fibrosis, macrophage infiltration, muscularization, vascularization, and defect size were evaluated at 4- and 8-weeks post-surgery. Compared with rats with fixed pericardium patches, rats with BPUR-reinforced hydrogel patches had fewer arrhythmias and greater right ventricular ejection fraction and cardiac output, as well as greater left ventricular ejection fraction, fractional shorting, stroke work and cardiac output. Histology and immunofluorescence staining showed less fibrosis and less patch material remaining in rats with BPUR-reinforced hydrogel patches at 4- and 8-weeks. Rats with BPUR-reinforced hydrogel patches also had a greater volume of granular tissue, a greater volume of muscularized tissue, more blood vessels, and a greater number of leukocytes, pan-macrophages, and M2 macrophages at 8 weeks. Overall, this study demonstrated that the engineered BPUR-reinforced hydrogel patch initiated greater regenerative vascular and muscular remodeling with a limited fibrotic response, resulting in fewer incidences of arrhythmia and improved heart function compared with fixed pericardium patches when applied to heal the defects created on the rat right ventricle wall. STATEMENT OF SIGNIFICANCE: The study tested a polyurethane-reinforced hydrogel patch in a rat right ventricle wall replacement model. Compared with fixed pericardium patches, these reinforced hydrogel patches initiated greater regenerative vascular and muscular remodeling with a reduced fibrotic response, resulting in fewer incidences of arrhythmia and improved heart function at 4- and 8-weeks post surgery. Overall, the new BPUR-reinforced hydrogel patches resulted in better heart function when replacing contractile myocardium than fixed pericardium patches.
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Affiliation(s)
- Ze-Wei Tao
- Department of Bioengineering, University of Colorado Anschutz Medical Campus, 12705 E Montview Blvd, Suite 100, Aurora 80045, CO, USA
| | - Siliang Wu
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX, USA
| | | | - Jeffrey G Jacot
- Department of Bioengineering, University of Colorado Anschutz Medical Campus, 12705 E Montview Blvd, Suite 100, Aurora 80045, CO, USA; Department of Pediatrics, Children's Hospital Colorado, Aurora, CO, USA.
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212
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Javaid MA, Zia KM, Zafar K, Khosa MK, Akram N, Ajmal M, Imran M, Iqbal MN. Synthesis and molecular characterization of chitosan/starch blends based polyurethanes. Int J Biol Macromol 2019; 146:243-252. [PMID: 31891704 DOI: 10.1016/j.ijbiomac.2019.12.234] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 12/02/2019] [Accepted: 12/25/2019] [Indexed: 12/20/2022]
Abstract
Starch/chitosan modified polyurethanes (PUs) were synthesized by step growth polymerization reaction between -NCO terminated prepolymer and chain extenders (1,4-Butanediol/starch/chitosan). Isophorone diisocyanate (IPDI) was reacted with hydroxyl-terminated polybutadiene (HTPB) to synthesize prepolymer and was further reacted with different moles ratio of starch/chitosan to produced five samples of polyurethane (PU). These samples were characterized by Fourier transformed infrared (FTIR) and Proton nuclear magnetic resonance (1H NMR) spectroscopy. The surface characterizations of PUs were done by scanning electron microscope (SEM). Thermogravimetric analysis showed that the thermal stability of PUs was higher when the mixture of both natural materials was used at equal amounts. It is concluded that combination of both starch and chitosan are efficient for the synthesis of PUs.
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Affiliation(s)
| | - Khalid Mahmood Zia
- Department of Applied Chemistry, Government College University, Faisalabad 38030, Pakistan.
| | - Kashif Zafar
- Department of Applied Chemistry, Government College University, Faisalabad 38030, Pakistan
| | | | - Nadia Akram
- Department of Chemistry, Government College University, Faisalabad 38030, Pakistan
| | - Muhammad Ajmal
- Department of Botany, Government College University, Faisalabad 38030, Pakistan
| | - Muhammad Imran
- Department of Soil and Environmental Sciences, University College of Agriculture, University of Sargodha, Sargodha 40100, Pakistan
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213
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Shababdoust A, Zandi M, Ehsani M, Shokrollahi P, Foudazi R. Controlled curcumin release from nanofibers based on amphiphilic-block segmented polyurethanes. Int J Pharm 2019; 575:118947. [PMID: 31837404 DOI: 10.1016/j.ijpharm.2019.118947] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 12/03/2019] [Accepted: 12/07/2019] [Indexed: 01/04/2023]
Abstract
A series of biodegradable amphiphilic-block segmented polyurethanes (SPUs) are designed and synthesized based on di-block and tri-block macrodiols of polycaprolactone (PCL) and polyethylene glycol (PEG). Curcumin, as a model herbal antibacterial agent, is used due to its effective inhibitory action against Gram-positive and Gram-negative bacteria. Curcumin-loaded nanofibers, with 400-900 nm diameter range, have been prepared by electrospinning of SPUs. The synthesized SPUs can be used for wound dressing applications due to their excellent mechanical properties and higher hydrophilicity in comparison to PCL-based polyurethane. The elongation-at-break of tri-block SPU with PEG-PCL-PEG soft segments is 350% when produced as an electrospun mat and that for film is 1500%. In vitro release of curcumin, examined by UV-Vis spectroscopy, shows a steady release during 18 days. The inclusion of PEG chains in the soft segment increases the hydrophilicity and biodegradation rate of the electrospun mats compared to a PCL-based polyurethane, which eventually results in a higher curcumin release rate. The antibacterial activity of 50 mg of 10% curcumin-loaded SPU nanofibers is about 100% and 93% against Escherichia coli (E. coli ATCC: 25922) and Staphylococcus aureus (S. aureus ATCC: 6538), respectively. Nontoxic behavior of the scaffolds is evaluated through MTT assay against L929 mouse fibroblast cells. The results show that the synthesized SPUs can be used as a nanoscale sustained release carrier. The SPU with PEG-PCL-PEG soft segments is an excellent candidate for wound dressing in tissues undergoing large deformations during normal activities.
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Affiliation(s)
- Ali Shababdoust
- Biomaterials Department, Iran Polymer and Petrochemical Institute, P.O. Box: 14965/115, Tehran, Iran
| | - Mojgan Zandi
- Biomaterials Department, Iran Polymer and Petrochemical Institute, P.O. Box: 14965/115, Tehran, Iran.
| | - Morteza Ehsani
- Plastic Department, Iran Polymer and Petrochemical Institute, P.O. Box: 14965/115, Tehran, Iran
| | - Parvin Shokrollahi
- Biomaterials Department, Iran Polymer and Petrochemical Institute, P.O. Box: 14965/115, Tehran, Iran
| | - Reza Foudazi
- Department of Chemical & Materials Engineering, New Mexico State University, MSC 3805, P.O. Box: 30001, Las Cruces, NM 88003-3805, USA
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214
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Abdel-Hamid S, Al-Qabandi O, N.A.S. E, Bassyouni M, Zoromba M, Abdel-Aziz M, Mira H, Y. E. Fabrication and Characterization of Microcellular Polyurethane Sisal Biocomposites. Molecules 2019; 24:molecules24244585. [PMID: 31847377 PMCID: PMC6943674 DOI: 10.3390/molecules24244585] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 11/29/2019] [Accepted: 12/12/2019] [Indexed: 11/29/2022] Open
Abstract
In this study, microcellular polyurethane (PU)-natural fiber (NF) biocomposites were fabricated. Polyurethanes based on castor oil and PMDI were synthesized with varying volume ratios of sisal fiber. The effect of natural fiber treatment using water and alkaline solution (1.5% NaOH) and load effect were investigated. Biocomposites were mechanically and physically investigated using tensile, viscoelasticity, and water absorption tests. The interfacial adhesion between PU and sisal fiber was studied using SEM. Short NF loads (3%) showed a significant improvement in the mechanical properties of the PU-sisal composite such as modulus of elasticity, yield and tensile strength up to 133%, 14.35 % and 36.7% respectively. Viscoelastic measurements showed that the composites exhibit an elastic trend as the real compliance (J’) values were higher than those of the imaginary compliance (J’’). Increasing NF loads resulted in a decrease of J’. Applying variable temperatures (120–80 °C) caused an increase in the stiffness at different frequencies.
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Affiliation(s)
- S.M.S. Abdel-Hamid
- Department of Chemical Engineering, the Egyptian Academy for Engineering and Advanced Technology, Affiliated to Ministry of Military Production, Al Salam city 3056, Egypt
- Correspondence: (S.M.S.A.-H.); or (M.B.); Tel.: +20-26-5792-10 (S.M.S.A.-H.); +20-11-5967-5357 (M.B.)
| | - O.A. Al-Qabandi
- EQUATE Petrochemicals Company, P.O. Box 91717, Ahmadi 61008, Kuwait;
| | - Elminshawy. N.A.S.
- Department of Mechanical Engineering, Faculty of Engineering, Port Said University, Port Fouad 42526, Egypt (E.Y.)
| | - M. Bassyouni
- Department of Chemical Engineering, Faculty of Engineering, Port Said University, Port Said 42526, Egypt
- Materials Science Program, University of Science and Technology, Zewail City of Science and Technology, October Gardens, 6th of October, Giza 12578, Egypt
- Correspondence: (S.M.S.A.-H.); or (M.B.); Tel.: +20-26-5792-10 (S.M.S.A.-H.); +20-11-5967-5357 (M.B.)
| | - M.S. Zoromba
- Chemical and Materials Engineering Department, King Abdulaziz University, Rabigh 21911, Saudi Arabia; or
- Chemistry Department, Faculty of Science, Port Said University, Port-Said 42521, Egypt
| | - M.H. Abdel-Aziz
- Chemical and Materials Engineering Department, King Abdulaziz University, Rabigh 21911, Saudi Arabia; or
- Chemical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria 21526, Egypt
| | - H. Mira
- Nuclear Materials Authority, Cairo 11381, Egypt;
| | - Elhenawy Y.
- Department of Mechanical Engineering, Faculty of Engineering, Port Said University, Port Fouad 42526, Egypt (E.Y.)
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215
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Wang C, Chen C, Guo M, Li B, Han F, Chen W. Stretchable collagen-coated polyurethane-urea hydrogel seeded with bladder smooth muscle cells for urethral defect repair in a rabbit model. J Mater Sci Mater Med 2019; 30:135. [PMID: 31802280 DOI: 10.1007/s10856-019-6342-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 11/16/2019] [Indexed: 06/10/2023]
Abstract
The major challenge to treat the clinical adverse effects of long-segment urethra is in achieving viable tissue substitution. The substituted construct's properties-such as its resilience, contraction, and ability to minimize scar-stenosis formation should be considered. In the present work, a unique polyurethane-urea (PUU) fibrous membrane is fabricated by electrospinning. Then PUU was coated by collagen and formed the elasticity hydrogel after immersed in collagen solution. Meanwhile, the cPUU hydrogel exhibited a fibrous microstructure. This cPUU hydrogel had outstanding stretching property with 404 ± 40% elongation at break compared with traditional hydrogels, which satisfied the requirement of urethra. The cPUU hydrogel also supported the adhesion and growth of bladder smooth-muscle cells (BSMCs) in natural state cell morphology. Urethral defects in New Zealand male rabbits were repaired with cPUU seeded with BSMCs in vivo. After three months, more smooth-surface area of reconstructed urethral tissues was observed in the cPUU hydrogel-BMSCs groups compared with that of the control group. The luminal patency and the incidence of complications-including calculus formation, urinary fistula, and urethral-stricture occurrence were significantly lower in the cPUU group compared with that of the control group. Hence, cPUU fibrous hydrogels are promising scaffolds for application in urological tissue engineering.
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Affiliation(s)
- Chengyuan Wang
- Department of Urology, The First Affiliated Hospital, Soochow University, Suzhou, Jiangsu, 215006, China
| | - Chunyang Chen
- Department of Urology, The First Affiliated Hospital, Soochow University, Suzhou, Jiangsu, 215006, China
| | - Mingyu Guo
- Orthopaedic Institute, College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou, Jiangsu, 215006, China
| | - Bin Li
- Orthopaedic Institute, College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou, Jiangsu, 215006, China.
| | - Fengxuan Han
- Orthopaedic Institute, College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou, Jiangsu, 215006, China.
| | - Weiguo Chen
- Department of Urology, The First Affiliated Hospital, Soochow University, Suzhou, Jiangsu, 215006, China.
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216
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Bu L, Zhang H, Xu K, Du B, Zhu C, Li Y. pH and reduction dual-responsive micelles based on novel polyurethanes with detachable poly(2-ethyl-2-oxazoline) shell for controlled release of doxorubicin. Drug Deliv 2019; 26:300-308. [PMID: 30895837 PMCID: PMC6442156 DOI: 10.1080/10717544.2019.1580323] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 02/01/2019] [Accepted: 02/04/2019] [Indexed: 11/30/2022] Open
Abstract
We describe a biodegradable amphiphilic polyurethane (PU) with disulfide bonds in the main chain [PEtOz-b-PU(SS)-b-PEtOz]. This multi-block PU was synthesized using poly (ε-caprolactone) diol (PCL-SS-PCL) and poly (2-ethyl-2-oxazoline) (PEtOz-OH) as soft segments, and bis (2-isocyanatoethyl) disulfide as the hard segment. Acid-sensitive PEtOz-OH was used as a hydrophilic segment for pH sensitivity. And reduction sensitivity was induced via disulfide bonds incorporated into the hydrophobic poly (ε-caprolactone) segment of the amphiphilic PUs. The system can self-assemble to form micelles responsive to pH and reducing conditions. The properties of the micelle were studied with dynamic light scattering and scanning electron microscopy. Doxorubicin (DOX) was chosen as a model drug. The in vitro release studies showed that PEtOz-b-PU(SS)-b-PEtOz micelle could degrade more rapidly and completely in a reductive and acidic environment [10 mM dl-Dithiothreitol, pH 5.0]. The methyl tetrazolium (MTT) assay and fluorescent microscopy confirmed the cytotoxicity of the DOX-loaded micelles. This work provides a promising dual-responsive drug carrier based on amphiphilic PU to achieve efficient drug delivery.
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Affiliation(s)
- Leran Bu
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, China
| | - Hena Zhang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, China
| | - Kang Xu
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, China
| | - Baixiang Du
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, China
| | - Caihong Zhu
- Orthopaedic Institute, Medical College, Soochow University, Suzhou, China
| | - Yuling Li
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, China
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217
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Li K, Shi J, Han Y, Xu C, Han H. Enhanced anaerobic degradation of quinoline, pyriding, and indole with polyurethane (PU), Fe 3O 4@PU, powdered activated carbon (PAC), Fe(OH) 3@PAC, biochar, and Fe(OH) 3@biochar and analysis of microbial succession in different reactors. Bioresour Technol 2019; 291:121866. [PMID: 31374417 DOI: 10.1016/j.biortech.2019.121866] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 07/16/2019] [Accepted: 07/20/2019] [Indexed: 06/10/2023]
Abstract
The study was to explore the feasibility of polyurethane (PU), Fe3O4@PU, powdered activated carbon (PAC), Fe(OH)3@PAC, biochar, and Fe(OH)3@biochar as biological carriers in strengthening anaerobic degradation of quinoline, pyridine, and indole. When the concentrations of pollutants were 25 mg/L and 50 mg/L, reactors based on PAC and Fe(OH)3@PAC had higher degradation ratios than the other reactors. However, when the concentrations of pollutants were 75 mg/L and 100 mg/L, with the addition of PU and Fe3O4@PU, reactors began to show their superiority in the degradation of the selected NHCs. Among these, the reactor based on Fe3O4@PU had the optimal degradation ratio on quinoline, pyridine, and indole. PU, PAC, Fe(OH)3@PAC, biochar, and Fe(OH)3@biochar benefited the enrichment of Acinetobacter, Comamonas, Levilinea, Longilinea, and Desulfomicrobium. The reactor with the carrier of Fe3O4@PU had some specificity, which benefited the enrichment of Zoogloea, Thiobacillus, Anaeromyxobacter, Sphingobium, Terrimonas, Parcubacteria genera incertae sedis, Bdellovibrio, Rhizobium, and Acidovorax.
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Affiliation(s)
- Kun Li
- State Engineering Research Center of Water Resources, Harbin Institute of Technology, Harbin 150090, China
| | - Jingxin Shi
- State Engineering Research Center of Water Resources, Harbin Institute of Technology, Harbin 150090, China.
| | - Yuxing Han
- School of Engineering, South China Agriculture University, Guangzhou 510642, China
| | - Chunyan Xu
- State Engineering Research Center of Water Resources, Harbin Institute of Technology, Harbin 150090, China
| | - Hongjun Han
- State Engineering Research Center of Water Resources, Harbin Institute of Technology, Harbin 150090, China
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218
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Sang Z, Ke K, Manas-Zloczower I. Design Strategy for Porous Composites Aimed at Pressure Sensor Application. Small 2019; 15:e1903487. [PMID: 31583819 DOI: 10.1002/smll.201903487] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/24/2019] [Indexed: 06/10/2023]
Abstract
Flexible and highly sensitive pressure sensors have versatile biomedical engineering applications for disease diagnosis and healthcare. The fabrication of such sensors based on porous structure composites usually requires complex, costly, and nonenvironmentally friendly procedures. As such, it is highly desired to develop facile, economical, and environment-friendly fabrication strategies for highly sensitive lightweight pressure sensors. Herein, a novel design strategy is reported to fabricate porous composite pressure sensors via a simple heat molding of conductive fillers and thermoplastic polyurethane (TPU) powders together with commercially available popcorn salts followed by water-assisted salt removal. The obtained TPU/carbon nanostructure (CNS) foam sensors have a linear resistance response up to 60% compressive strain with a gauge factor (GF ) of 1.5 and show reversible and reproducible piezoresistive properties due to the robust electrically conductive pathways formed on the foam struts. Such foam sensors can be potentially utilized for guiding squatting exercises and respiration rate monitoring in daily physical training.
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Affiliation(s)
- Zhen Sang
- Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, OH, 44106-7202, USA
| | - Kai Ke
- Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, OH, 44106-7202, USA
| | - Ica Manas-Zloczower
- Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Road, Cleveland, OH, 44106-7202, USA
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219
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Saini A, Clarke J, Harner T. Direct measurements of polyurethane foam (PUF) ‒ air partitioning coefficients for chemicals of emerging concern capable of equilibrating in PUF disk samplers. Chemosphere 2019; 234:925-930. [PMID: 31519101 DOI: 10.1016/j.chemosphere.2019.06.134] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 06/13/2019] [Accepted: 06/18/2019] [Indexed: 06/10/2023]
Abstract
Organophosphate esters (OPEs), novel flame retardants (NFRs) and organochlorine pesticides (OCPs) are volatile to semi-volatile chemicals and therefore susceptible to approach equilibrium during typical deployments of polyurethane foam (PUF) disk passive air samplers. A generator column approach was used to measure the PUF-air partitioning coefficient (KPUF-air) for these targeted chemicals. KPUF-air values are required for these chemicals to estimate sampled equivalent air volumes, which vary substantially with temperature. Log KPUF-air measurements were made at temperatures ranging from +6 to +35 °C and resulting values ranged from 5.14 to 7.77. Enthalpies of phase change for PUF to air (ΔHPUF-air, kJ/mol) ranged from 51.3 to 98.9. Two relationships of log KPUF-air versus log Koctanol-air (KOA) were derived, grouping OPEs and NFRs separately. The relationship for NFRs was in fair agreement (within about 0.6 log units) to a long-standing relationship by Shoeib and Harner (since 2002) for polychlorinated biphenyls (PCBs). However, the estimated values using Shoeib-Harner relationship substantially underestimates KPUF-air for the OPEs than directly measured values (by about an order of magnitude). These findings highlight the importance of the direct measurements of KPUF-air for emerging classes of chemicals whose concentrations are at risk of equilibrating in PUF disk samplers.
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Affiliation(s)
- Amandeep Saini
- Air Quality Processes Research Section, Environment and Climate Change Canada, 4905 Dufferin Street, Toronto, Ontario, M3H 5T4, Canada.
| | - Jenna Clarke
- Air Quality Processes Research Section, Environment and Climate Change Canada, 4905 Dufferin Street, Toronto, Ontario, M3H 5T4, Canada
| | - Tom Harner
- Air Quality Processes Research Section, Environment and Climate Change Canada, 4905 Dufferin Street, Toronto, Ontario, M3H 5T4, Canada.
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220
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Qiu J, Guo X, Chu R, Wang S, Zeng W, Qu L, Zhao Y, Yan F, Xing G. Rapid-Response, Low Detection Limit, and High-Sensitivity Capacitive Flexible Tactile Sensor Based on Three-Dimensional Porous Dielectric Layer for Wearable Electronic Skin. ACS Appl Mater Interfaces 2019; 11:40716-40725. [PMID: 31596567 DOI: 10.1021/acsami.9b16511] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Three-dimensional (3D) porous conductive composites explored in highly sensitive tactile sensors have attracted extensive close attention in recent years owing to their peculiar porous structure and unique physical properties in terms of excellent mechanical flexibility, high relative dielectric permittivity, and good elastic property. Herein, we report an practical, efficient, and macroscopic dip-coating process to manufacture rapid-response, low detection limit, high-sensitivity, and highly sensitive capacitive flexible tactile sensors. The fabrication process, tactile perception mechanism, and sensing performance of the developed devices are comparatively investigated. The homogeneous 3D hybrid network constructed by graphene nanoplatelets/carboxyl-functionalized multiwalled carbon nanotubes/silicone rubber composites anchored on polyurethane sponge skeletons exhibits a significantly improved dielectric property, resulting in a high-performance capacitive flexible tactile sensor with a fast response time (∼45 ms), an extremely low-pressure detection limit of ∼3 Pa, excellent sensitivity (∼0.062 kPa-1), and excellent durability and stability over 2000 cycles. Importantly, the flexible devices can be used as the wearable electronic skin and successfully mounted on human skin or a soft-bodied robot to achieve the capability of physiological stimuli monitoring, micropressure monitoring, soft grabbing, etc. Our rapid-response, low detection limit, and high-sensitivity capacitive flexible tactile sensor with a novel 3D porous dielectric layer could be a prospective candidate for the wearable applications in real-time and high-accuracy portable healthcare monitoring devices, advanced human-machine interfaces, and intelligent robot perception systems.
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Affiliation(s)
- Jie Qiu
- Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education, School of Electronics and Information Engineering , Anhui University , 111 Jiulong Road , Hefei , Anhui 230601 , P. R. China
| | - Xiaohui Guo
- Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education, School of Electronics and Information Engineering , Anhui University , 111 Jiulong Road , Hefei , Anhui 230601 , P. R. China
| | - Ran Chu
- Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education, School of Electronics and Information Engineering , Anhui University , 111 Jiulong Road , Hefei , Anhui 230601 , P. R. China
| | - Siliang Wang
- Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education, School of Electronics and Information Engineering , Anhui University , 111 Jiulong Road , Hefei , Anhui 230601 , P. R. China
| | - Wei Zeng
- Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education, School of Electronics and Information Engineering , Anhui University , 111 Jiulong Road , Hefei , Anhui 230601 , P. R. China
| | - Lei Qu
- Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education, School of Electronics and Information Engineering , Anhui University , 111 Jiulong Road , Hefei , Anhui 230601 , P. R. China
| | - Yunong Zhao
- School of Optical and Electronic Information , Huazhong University of Science and Technology , 1037 Luoyu Road , Wuhan , Hubei 430074 , P. R. China
| | - Feng Yan
- Department of Metallurgical and Materials Engineering , The University of Alabama , Tuscaloosa , Alabama 35487 , United States
| | - Guozhong Xing
- Key Laboratory of Microelectronic Devices & Integrated Technology , Institute of Microelectronics, Chinese Academy of Sciences , Beijing 100029 , P. R. China
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221
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Zhang F, Hu C, Kong Q, Luo R, Wang Y. Peptide-/Drug-Directed Self-Assembly of Hybrid Polyurethane Hydrogels for Wound Healing. ACS Appl Mater Interfaces 2019; 11:37147-37155. [PMID: 31513742 DOI: 10.1021/acsami.9b13708] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Drug-loading hydrogels are promising candidates in the bioengineering research field; nevertheless, hydrophobic drug loading into a hydrophilic carrier system remains unsolved and is full of challenges. In this work, following the potential dual interactions between peptides and aromatic drugs, we developed a potent hybrid hydrogel formation method, namely, "peptide-/drug-directed self-assembly". The hybrid hydrogels were synthesized using polyethylene glycol (PEG)-based Fmoc-FF peptide hybrid polyurethane, in which curcumin could be encapsulated through self-assembly with Fmoc-FF peptide via π-π stacking. On the basis of this, curcumin loading capacity could be improved to as high as 3.3 wt % with sustained release. In addition, the curcumin loading enhanced the hydrogel mechanical properties from 4 kPa to over 10 kPa, similar to that of natural soft tissues. Furthermore, the hydrogels were injectable with self-healing properties since the Fmoc-FF peptide/curcumin coassembly was noncovalent and reversible. Spectroscopy results confirmed the existence of the coassembly of Fmoc-FF peptide/curcumin. Further in vivo experiments effectively demonstrated that the hydrogels could improve the cutaneous wound healing in a full-thickness skin defected model. This peptide-/drug-directed self-assembly of hybrid polyurethane hydrogel could be used as a promising platform for tissue-engineering scaffold and biomedical application.
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Affiliation(s)
- Fanjun Zhang
- National Engineering Research Center for Biomaterials , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
| | - Cheng Hu
- National Engineering Research Center for Biomaterials , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
| | - Qunshou Kong
- National Engineering Research Center for Biomaterials , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
| | - Rifang Luo
- National Engineering Research Center for Biomaterials , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
| | - Yunbing Wang
- National Engineering Research Center for Biomaterials , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
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Moghanizadeh-Ashkezari M, Shokrollahi P, Zandi M, Shokrolahi F, Daliri MJ, Kanavi MR, Balagholi S. Vitamin C Loaded Poly(urethane-urea)/ZnAl-LDH Aligned Scaffolds Increase Proliferation of Corneal Keratocytes and Up-Regulate Vimentin Secretion. ACS Appl Mater Interfaces 2019; 11:35525-35539. [PMID: 31490646 DOI: 10.1021/acsami.9b07556] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A novel poly(urethane-urea) (PUU) based on poly(glycolide-co-ε-caprolactone) macro-diol with tunable mechanical properties and biodegradation behavior is reported for corneal stromal tissue regeneration. Zn-Al layered double hydroxide (LDH) nanoparticles were synthesized and loaded with vitamin C (VC, VC-LDH) and dispersed in the PUU to control VC release in the cell culturing medium. To mimic the corneal stromal EC, scaffolds of the PUU and its nanocomposites with VC-LDH (PUU-LDH and PUU-VC-LDH) were fabricated via electrospinning. Average diameters of the aligned nanofibers were recorded as 325 ± 168, 343 ± 171, and 414 ± 275 nm for the PUU, PUU-LDH, and PUU-VC-LDH scaffolds, respectively. Results of hydrophilicity and mechanical properties measurements showed increased hydrophobicity and reduced tensile strength and elongation at break upon addition of nanoparticles to the PUU scaffold. VC release studies represented that intercalation of the drug in Zn-Al-LDH controlled the burst release and extended the release period from a few hours to 5 days. Viability and proliferation of stromal keratocyte cells on the scaffolds were investigated via AlamarBlue assay. After 24 h, the cells showed similar viability on the scaffolds and the control. After 1 week, the cells showed some degree of proliferation on the scaffolds, with the highest value recorded for PUU-VC-LDH. SEM images of the scaffolds after 24 h and 1 week confirmed good penetration and attachment of keratocytes on all the scaffolds and the cells oriented with the direction of nanofibers. After 1 week, the PUU-VC-LDH scaffold was fully covered by the cells. Immunocytochemistry assay (ICC) was performed to investigate secretion of vimentin protein, ALDH3A1, and α-SMA by the cells. After 24h and 1 week, remarkably higher levels of vimentin and ALDH3A1 and lower level of α-SMA were secreted by keratocytes on PUU-VC-LDH compared to those on the PUU and PUU-LDH scaffolds and the control. Our results suggest that the aligned PUU-VC-LDH is a promising candidate for corneal stromal tissue engineering due to the presence of zinc and vitamin C.
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Affiliation(s)
- Mojgan Moghanizadeh-Ashkezari
- Department of Biomaterials, Faculty of Science , Iran Polymer and Petrochemical Institute , 14977-13115 , Tehran , Iran
| | - Parvin Shokrollahi
- Department of Biomaterials, Faculty of Science , Iran Polymer and Petrochemical Institute , 14977-13115 , Tehran , Iran
| | - Mojgan Zandi
- Department of Biomaterials, Faculty of Science , Iran Polymer and Petrochemical Institute , 14977-13115 , Tehran , Iran
| | - Fatemeh Shokrolahi
- Department of Biomaterials, Faculty of Science , Iran Polymer and Petrochemical Institute , 14977-13115 , Tehran , Iran
| | - Morteza J Daliri
- Department of Animal and Marine Biotechnology , National Institute of Genetic Engineering and Biotechnology , 14977-16316 Tehran , Iran
| | - Mozhgan R Kanavi
- Ocular Tissue Engineering Research Center , Shahid Beheshti University of Medical Sciences , 16666-63111 , Tehran , Iran
| | - Sahar Balagholi
- Blood Transfusion Research Center , High Institute for Research and Education in Transfusion Medicine , 14665-1157 , Tehran , Iran
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223
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El-Kurdi M, Soletti L, McGrath J, Linhares S, Rousselle S, Greisler H, Edelman E, Schoen FJ. Functional remodeling of an electrospun polydimethylsiloxane-based polyether urethane external vein graft support device in an ovine model. J Biomed Mater Res A 2019; 107:2135-2149. [PMID: 31094084 PMCID: PMC6689261 DOI: 10.1002/jbm.a.36724] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 02/13/2019] [Accepted: 05/07/2019] [Indexed: 11/07/2022]
Abstract
Saphenous vein graft (SVG) failure rates are unacceptably high, and external mechanical support may improve patency. We studied the histologic remodeling of a conformal, electrospun, polydimethylsiloxane-based polyether urethane external support device for SVGs and evaluated graft structural evolution in adult sheep to 2 years. All sheep (N = 19) survived to their intended timepoints, and angiography showed device-treated SVG geometric stability over time (30, 90, 180, 365, or 730 days), with an aggregated graft patency rate of 92%. There was minimal inflammation associated with the device material at all timepoints. By 180 days, treated SVG remodeling was characterized by minimal/nonprogressive intimal hyperplasia; polymer fragmentation and integration; as well as the development of a neointima, and a confluent endothelium. By 1-year, the graft developed a media-like layer by remodeling the neointima, and elastic fibers formed well-defined structures that subtended the neo-medial layer of the remodeled SVG. Immunohistochemistry showed that this neo-media was populated with smooth muscle cells, and the intima was lined with endothelial cells. These data suggest that treated SVGs were structurally remodeled by 180 days, and developed arterial-like features by 1 year, which continued to mature to 2 years. Device-treated SVGs remodeled into arterial-like conduits with stable long-term performance as arterial grafts in adult sheep.
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Affiliation(s)
| | | | | | | | | | - Howard Greisler
- Loyola University, Maywood, IL and Hines VA Hospital, Hines, IL
| | - Elazer Edelman
- Massachusetts Institute of Technology, Cambridge, MA, Harvard Medical School, Boston, MA, Brigham and Women’s Hospital, Boston, MA
| | - Frederick J. Schoen
- Brigham and Women’s Hospital, Boston, MA, and Harvard Medical School, Boston, MA
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224
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Sun J, Rust T, Kuckling D. Light-Responsive Serinol-Based Polyurethane Nanocarrier for Controlled Drug Release. Macromol Rapid Commun 2019; 40:e1900348. [PMID: 31553503 DOI: 10.1002/marc.201900348] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 09/11/2019] [Indexed: 12/13/2022]
Abstract
In the present work, a new and facile strategy for the synthesis of light-responsive polyurethanes (LrPUs) based on serinol with o-nitrobenzyl pendent groups is developed. Stable monodisperse nanoparticles from these LrPUs can be formulated reproducibly in a simple manner, which is shown by dynamic light scattering (DLS) measurements. Upon irradiation with UV light, both polymers and nanoparticles undergo rapid degradation, which is investigated by DLS, scanning electron microscopy, size exclusion chromatography, and UV-vis spectroscopy. The nanoparticles are also employed for the encapsulation of the model drug Nile Red, and by exposure to UV light, a burst release of the payload is detected via fluorescence spectroscopy. This strategy can be easily applied to the straightforward synthesis of various new serinol-based monomers with different stimuli-responsive properties and therefore expand the family of biodegradable polymers.
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Affiliation(s)
- Jingjiang Sun
- Key Laboratory of Rubber-plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Zhengzhou Rd. 53, Qingdao, CN-266042, China
- Department of Chemistry, Paderborn University, Warburger Str. 100, D-33098, Paderborn, Germany
| | - Tarik Rust
- Department of Chemistry, Paderborn University, Warburger Str. 100, D-33098, Paderborn, Germany
| | - Dirk Kuckling
- Department of Chemistry, Paderborn University, Warburger Str. 100, D-33098, Paderborn, Germany
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225
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Chan JP, Battiston KG, Santerre JP. Synthesis and characterization of electrospun nanofibrous tissue engineering scaffolds generated from in situ polymerization of ionomeric polyurethane composites. Acta Biomater 2019; 96:161-174. [PMID: 31254683 DOI: 10.1016/j.actbio.2019.06.046] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 06/20/2019] [Accepted: 06/25/2019] [Indexed: 12/27/2022]
Abstract
Tissue scaffolds need to be engineered to be cell compatible, have timely biodegradable character, be functional with respect to providing niche cell support for tissue repair and regeneration, readily accommodate multiple cell types, and have mechanical properties that enable the simulation of the native tissue. In this study, electrospun degradable polar hydrophobic ionic polyurethane (D-PHI) scaffolds were generated in order to yield an extracellular matrix-like structure for tissue engineering applications. D-PHI oligomers were synthesized, blended with a degradable linear polycarbonate polyurethane (PCNU), and electrospun with simultaneous in situ UV cross-linking in order to generate aligned nanofibrous scaffolds in the form of elastomeric composite materials. The D-PHI/PCNU scaffold fibre morphology, cross-linking efficiency, surface nature, mechanical properties, in vivo degradation and integration, as well as in vitro cell compatibility were characterized. The results showed that D-PHI/PCNU scaffolds had a high cross-linking efficiency, stronger polar nature, and lower stiffness relative to PCNU scaffolds. In vivo, the D-PHI/PCNU scaffold degraded relatively slowly, thereby enabling new tissue time to form and yielding very good integration with the latter tissue. Based on a study with A10 vascular smooth muscle cells, the D-PHI/PCNU scaffold was able to support high cell viability, adhesion, and expression of typical smooth muscle cell markers after a 7-day culture period, which was comparable to PCNU scaffolds. These characterization results demonstrate that the unique properties of a D-PHI/PCNU scaffold, combined with the benefits of electrospinning, could allow for the generation of a tissue engineered scaffold that mimics important aspects of the native extracellular matrix and could be used for functional tissue regeneration. STATEMENT OF SIGNIFICANCE: Tissue engineered scaffolds should recapitulate native extracellular matrix features. This study investigates the processing of a classical polycarbonate polyurethane (PCNU) with a cross-linked and degradable ionomeric polyurethane (D-PHI), polymerized via in situ rapid light curing to yield a 3-dimensional co-electrospun nanofibre matrix with chemical diversity and low modulus character. This research advances the use of D-PHI for tissue engineering applications by providing a facile means of changing physical and chemical properties in classical PCNUs without the need to adjust spinning viscosities of the base polymer. Further, the in vivo and cell culture findings set the stage for introducing unique elastic materials which inherently support wound healing, repair, and regeneration in tissues, for applications that require the recapitulation of native extracellular matrix physical features.
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Affiliation(s)
- Jennifer P Chan
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9, Canada; Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, University of Toronto, Toronto, Ontario M5G 1M1, Canada
| | - Kyle G Battiston
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9, Canada; Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, University of Toronto, Toronto, Ontario M5G 1M1, Canada; Faculty of Dentistry, University of Toronto, Toronto, Ontario M5G 1G6, Canada
| | - J Paul Santerre
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9, Canada; Translational Biology and Engineering Program, Ted Rogers Centre for Heart Research, University of Toronto, Toronto, Ontario M5G 1M1, Canada; Faculty of Dentistry, University of Toronto, Toronto, Ontario M5G 1G6, Canada.
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226
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Hsieh CT, Hsu SH. Double-Network Polyurethane-Gelatin Hydrogel with Tunable Modulus for High-Resolution 3D Bioprinting. ACS Appl Mater Interfaces 2019; 11:32746-32757. [PMID: 31407899 DOI: 10.1021/acsami.9b10784] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Three-dimensional (3D) bioprinting is a technology to print materials (bioink) with cells into customized tissues for regeneration or organoids for drug screening applications. Herein, a series of biodegradable polyurethane (PU)-gelatin hydrogel with tunable mechanical properties and degradation rates were developed as the bioink. The PU-gelatin hydrogel demonstrated good printability in 24-31 °C and could print a complicated structure such as the nose-shaped construct. Due to the excellent shear thinning and fast strain recovery properties, the PU-gelatin hydrogel also had long working windows for bioprinting (over 24 h), stacking ability (up to 80 layers), and feasibility for high-resolution printing (through an 80 μm nozzle). The structure stability of the PU-gelatin hydrogel was maintained by two-stage double-network formation through Ca2+ chelation and thermal gelation at 37 °C without any toxic cross-linking reagent. The compressive modulus of printed PU-gelatin hydrogel constructs increased in about 3-fold by the treatment of CaCl2 solution for 15 min and enhanced further after incubation because of the thermal sensitivity of PU at 37 °C. Mesenchymal stem cells (MSCs) printed with the PU-gelatin hydrogel through the 80 μm nozzle showed good viability, high mobility, and ∼200% proliferation ratio (or an ∼300% proliferation ratio through a 200 μm nozzle) in 10 days. Furthermore, the MSC-laden PU-gelatin constructs containing small molecular drug Y27632 underwent chondrogenesis in 10 days. The novel series of PU-gelatin hydrogels with tunable modulus, long working window, convenient bioprinting process, and high-resolution printing possibilities may serve as new bioink for 3D bioprinting of various tissues.
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Affiliation(s)
- Cheng-Tien Hsieh
- Institute of Polymer Science and Engineering , National Taiwan University , No. 1, Sec. 4, Roosevelt Road , Taipei 10617 , Taiwan, R.O.C
| | - Shan-Hui Hsu
- Institute of Polymer Science and Engineering , National Taiwan University , No. 1, Sec. 4, Roosevelt Road , Taipei 10617 , Taiwan, R.O.C
- Institute of Cellular and System Medicine , National Health Research Institutes , Zhunan 35053 , Taiwan, R.O.C
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227
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Hýsek Š, Frydrych M, Herclík M, Fridrichová L, Louda P, Knížek R, Le Van S, Le Chi H. Permeable Water-Resistant Heat Insulation Panel Based on Recycled Materials and Its Physical and Mechanical Properties. Molecules 2019; 24:molecules24183300. [PMID: 31514275 PMCID: PMC6767281 DOI: 10.3390/molecules24183300] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 09/07/2019] [Accepted: 09/10/2019] [Indexed: 11/16/2022] Open
Abstract
This paper deals with the development and characteristics of the properties of a permeable water-resistant heat insulation panel based on recycled materials. The insulation panel consists of a thermal insulation core of recycled soft polyurethane foam and winter wheat husk, a layer of geopolymer that gives the entire sandwich composite strength and fire resistance, and a nanofibrous membrane that permits water vapor permeability, but not water in liquid form. The observed properties are the thermal conductivity coefficient, volumetric heat capacity, fire resistance, resistance to long-term exposure of a water column, and the tensile strength perpendicular to the plane of the board. The results showed that while the addition of husk to the thermal insulation core does not significantly impair its thermal insulation properties, the tensile strength perpendicular to the plane of these boards was impaired by the addition of husk. The geopolymer layer increased the fire resistance of the panel for up to 13 min, and the implementation of the nanofibrous membrane resulted in a water flow of 154 cm2 in the amount of 486 g of water per 24 h at a water column height of 0.8 m.
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Affiliation(s)
- Štěpán Hýsek
- Department of Material Science, Faculty of Mechanical Engineering, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic.
| | - Miroslav Frydrych
- Department of Textile Evaluation, Faculty of Textile Engineering, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic
| | - Miroslav Herclík
- Department of Textile Evaluation, Faculty of Textile Engineering, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic.
| | - Ludmila Fridrichová
- Department of Textile Evaluation, Faculty of Textile Engineering, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic.
| | - Petr Louda
- Department of Material Science, Faculty of Mechanical Engineering, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic.
| | - Roman Knížek
- Department of Textile Evaluation, Faculty of Textile Engineering, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic.
| | - Su Le Van
- Department of Material Science, Faculty of Mechanical Engineering, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic.
| | - Hiep Le Chi
- Department of Material Science, Faculty of Mechanical Engineering, Technical University of Liberec, Studentska 2, 461 17 Liberec, Czech Republic.
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228
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Cho K, Wang G, Raju R, Rajan G, Fang J, Stenzel MH, Farrar P, Prusty BG. Influence of Surface Treatment on the Interfacial and Mechanical Properties of Short S-Glass Fiber-Reinforced Dental Composites. ACS Appl Mater Interfaces 2019; 11:32328-32338. [PMID: 31393104 DOI: 10.1021/acsami.9b01857] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The influence of interfacial shear strength (IFSS) between processed short S-glass fibers (250 and 350 μm in length, 5 μm in diameter) and the dental resin (a mixture of urethane dimethacrylate and triethylene glycol dimethacrylate monomers) on the mechanical properties has been studied experimentally. The surface profile of short S-glass fibers was modified using a selective atomic level metal etching process and simple silanization process to enhance the interfacial properties. The S-glass fibers were etched in acid solutions to increase the surface roughness and selectively remove Al3+ and Mg2+ ions, which promoted the mechanical and chemical interfacial bonding reactions. The single glass fiber tensile and microdroplet pull-out tests were performed to investigate the effects of interfacial properties on the flexural strength of the resultant composites. The surface modified S-glass fibers showed an increase of 11-40% in IFSS compared to untreated glass fibers. Composites reinforced with 350 μm length glass fibers (AR-70), which were treated in piranha solution for 4 h, showed the highest improvement in overall mechanical properties, flexural strength (34.2%), modulus (9.7%), and breaking energy (51.9%), compared to the untreated fiber-reinforced composites. The modified Lewis-Nielsen equation was developed using the effective fiber length factor to accurately predict the modulus of the short fiber-reinforced composites and validated with experimental results.
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Affiliation(s)
| | | | | | - Ginu Rajan
- School of Electrical, Computer and Telecommunications Engineering , University of Wollongong , Wollongong , NSW 2522 , Australia
| | - Jian Fang
- Institute for Frontier Materials , Deakin University , Geelong , VIC 3220 , Australia
| | | | - Paul Farrar
- SDI Limited , Bayswater , VIC 3153 , Australia
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229
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Jiang Z, Nayeem MOG, Fukuda K, Ding S, Jin H, Yokota T, Inoue D, Hashizume D, Someya T. Highly Stretchable Metallic Nanowire Networks Reinforced by the Underlying Randomly Distributed Elastic Polymer Nanofibers via Interfacial Adhesion Improvement. Adv Mater 2019; 31:e1903446. [PMID: 31339196 DOI: 10.1002/adma.201903446] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 06/28/2019] [Indexed: 05/03/2023]
Abstract
On-skin electronics require conductive, porous, and stretchable materials for a stable operation with minimal invasiveness to the human body. However, porous elastic conductors that simultaneously achieve high conductivity, good stretchability, and durability are rare owing to the lack of proper design for good adhesion between porous elastic polymer and conductive metallic networks. Here, a simple fabrication approach for porous nanomesh-type elastic conductors is shown by designing a layer-by-layer structure of nanofibers/nanowires (NFs/NWs) via interfacial hydrogen bonding. The as-prepared conductors, consisting of Ag NWs and polyurethane (PU) NFs, simultaneously achieve high conductivity (9190 S cm-1 ), high stretchability (310%), and good durability (82% resistance increase after 1000 cycles of deformation at 70% tensile strain). The direct contact between the Ag NWs enables the high conductivity. The synergistic effect of the layer-by-layer structure and good adhesion between the Ag NWs and the PU NFs enables good mechanical properties. Furthermore, without any adhesive gel/tape, the conductors can be utilized as breathable strain sensors for precise joint motion monitoring, and as breathable sensing electrodes for continuous electrophysiological signal recording.
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Affiliation(s)
- Zhi Jiang
- Thin-Film Device Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
- Electrical and Electronic Engineering and Information Systems, The University of Tokyo, 7-3-1 Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Md Osman Goni Nayeem
- Electrical and Electronic Engineering and Information Systems, The University of Tokyo, 7-3-1 Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Kenjiro Fukuda
- Thin-Film Device Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
- Center for Emergent Matter Science, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Su Ding
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310-018, P. R. China
| | - Hanbit Jin
- Electrical and Electronic Engineering and Information Systems, The University of Tokyo, 7-3-1 Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Tomoyuki Yokota
- Electrical and Electronic Engineering and Information Systems, The University of Tokyo, 7-3-1 Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Daishi Inoue
- Center for Emergent Matter Science, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Daisuke Hashizume
- Center for Emergent Matter Science, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Takao Someya
- Thin-Film Device Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
- Electrical and Electronic Engineering and Information Systems, The University of Tokyo, 7-3-1 Bunkyo-ku, Tokyo, 113-8656, Japan
- Center for Emergent Matter Science, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
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230
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Kong L, Xu D, He Z, Wang F, Gui S, Fan J, Pan X, Dai X, Dong X, Liu B, Li Y. Nanocellulose-Reinforced Polyurethane for Waterborne Wood Coating. Molecules 2019; 24:molecules24173151. [PMID: 31470628 PMCID: PMC6749433 DOI: 10.3390/molecules24173151] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Revised: 08/16/2019] [Accepted: 08/26/2019] [Indexed: 11/24/2022] Open
Abstract
With the enhancement of people’s environmental awareness, waterborne polyurethane (PU) paint—with its advantages of low release of volatile organic compounds (VOCs), low temperature flexibility, acid and alkali resistance, excellent solvent resistance and superior weather resistance—has made its application for wood furniture favored by the industry. However, due to its lower solid content and weak intermolecular force, the mechanical properties of waterborne PU paint are normally less than those of the traditional solvent-based polyurethane paint, which has become the key bottleneck restricting its wide applications. To this end, this study explores nanocellulose derived from biomass resources by the 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) oxidation method to reinforce and thus improve the mechanical properties of waterborne PU paint. Two methods of adding nanocellulose to waterborne PU—chemical addition and physical blending—are explored. Results show that, compared to the physical blending method, the chemical grafting method at 0.1 wt% nanocellulose addition results in the maximum improvement of the comprehensive properties of the PU coating. With this method, the tensile strength, elongation at break, hardness and abrasion resistance of the waterborne PU paint increase by up to 58.7%, ~55%, 6.9% and 3.45%, respectively, compared to the control PU; while the glossiness and surface drying time were hardly affected. Such exploration provides an effective way for wide applications of water PU in the wood industry and nanocellulose in waterborne wood coating.
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Affiliation(s)
- Linglong Kong
- State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River, Shandong Agricultural University, No. 61 Daizong Road, Taian 271018, China
- Qingdao Institute of Biomass Energy and Bioprocess Technology, Chinese Academy of Sciences, No.189 Songling Road, Qingdao 266101, China
| | - Dandan Xu
- State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River, Shandong Agricultural University, No. 61 Daizong Road, Taian 271018, China
| | - Zaixin He
- State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River, Shandong Agricultural University, No. 61 Daizong Road, Taian 271018, China
| | - Fengqiang Wang
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Shihan Gui
- State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River, Shandong Agricultural University, No. 61 Daizong Road, Taian 271018, China
| | - Jilong Fan
- State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River, Shandong Agricultural University, No. 61 Daizong Road, Taian 271018, China
| | - Xiya Pan
- State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River, Shandong Agricultural University, No. 61 Daizong Road, Taian 271018, China
| | - Xiaohan Dai
- State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River, Shandong Agricultural University, No. 61 Daizong Road, Taian 271018, China
| | - Xiaoying Dong
- State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River, Shandong Agricultural University, No. 61 Daizong Road, Taian 271018, China.
| | - Baoxuan Liu
- Shandong Laucork Develepment Co. Ltd., Room 401, building A2, High-tech Zone, Jining 272100, China.
| | - Yongfeng Li
- State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River, Shandong Agricultural University, No. 61 Daizong Road, Taian 271018, China.
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231
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Nouri N, Sereshti H. Electrospun polymer composite nanofiber-based in-syringe solid phase extraction in tandem with dispersive liquid-liquid microextraction coupled with HPLC-FD for determination of aflatoxins in soybean. Food Chem 2019; 289:33-39. [PMID: 30955621 DOI: 10.1016/j.foodchem.2019.03.026] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 03/10/2019] [Accepted: 03/10/2019] [Indexed: 01/22/2023]
Abstract
A fast method based on in-syringe solid phase extraction combined with dispersive liquid-liquid microextraction was developed for extraction of aflatoxins prior to HPLC-FD. Electrospun polyurethane nanofibers doped with graphene oxide were collected on a thin metal net sheet without using a binder, placed into a filter holder between filter papers on a syringe tip and used as an efficient adsorbent for the first time. The major parameters affecting whole extraction efficiency were investigated and optimized. Under the optimum conditions, the limits of detection and the limits of quantification were in the range of 0.09-0.15 and 0.3-0.5 µg kg-1, respectively. The linear dynamic range was 0.3-1000 µg kg-1 with determination coefficients of 0.9946-0.9965. The inter- and intra-day precisions were lower than 4.3 and 7.2%, respectively. The method was successfully applied for the determination of aflatoxins B1, B2, G1, and G2 in soybeans and satisfactory relative recoveries of 76-101% were achieved.
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Affiliation(s)
- Nina Nouri
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Hassan Sereshti
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran.
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232
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Kong AM, Yap KK, Lim SY, Marre D, Pébay A, Gerrand YW, Lees JG, Palmer JA, Morrison WA, Mitchell GM. Bio-engineering a tissue flap utilizing a porous scaffold incorporating a human induced pluripotent stem cell-derived endothelial cell capillary network connected to a vascular pedicle. Acta Biomater 2019; 94:281-294. [PMID: 31152943 DOI: 10.1016/j.actbio.2019.05.067] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 05/21/2019] [Accepted: 05/28/2019] [Indexed: 01/18/2023]
Abstract
Tissue flaps are used to cover large/poorly healing wounds, but involve complex surgery and donor site morbidity. In this study a tissue flap is assembled using the mammalian body as a bioreactor to functionally connect an artery and vein to a human capillary network assembled from induced pluripotent stem cell-derived endothelial cells (hiPSC ECs). In vitro: Porous NovoSorb™ scaffolds (3 mm × 1.35 mm) were seeded with 200,000 hiPSC ECs ± 100,000 human vascular smooth muscle cells (hvSMC), and cultured for 1-3 days, with capillaries formed by 24 h which were CD31+, VE-Cadherin+, EphB4+, VEGFR2+ and Ki67+, whilst hvSMCs (calponin+) attached abluminally. In vivo: In SCID mice, bi-lateral epigastric vascular pedicles were isolated in a silicone chamber for a 3 week 'delay period' for pedicle capillary sprouting, then reopened, and two hiPSC EC ± hvSMCs seeded scaffolds transplanted over the pedicle. The chamber was either resealed (Group 1), or removed and surrounding tissue secured around the pedicle + scaffolds (Group 2), for 1 or 2 weeks. Human capillaries survived in vivo and were CD31+, VE-Cadherin+ and VEGFR2+. Human vSMCs remained attached, and host mesenchymal cells also attached abluminally. Systemically injected FITC-dextran present in human capillary lumens indicated inosculation to host capillaries. Human iPSC EC capillary morphometric parameters at one week in vivo were equal to or higher than the same parameters measured in human abdominal skin. This 'proof of concept' study has demonstrated that bio-engineering an autologous human tissue flap based on hiPSC EC could minimize the use of donor flaps and has potential applications for complex wound coverage. STATEMENT OF SIGNIFICANCE: Tissue flaps, used for surgical reconstruction of wounds, require complex surgery, often associated with morbidity. Bio-engineering a simpler alternative, we assembled a human induced pluripotent stem cell derived endothelial cell (hiPSC ECs) capillary network in a porous scaffold in vitro, which when transplanted over a mouse vascular pedicle in vivo formed a functional tissue flap with mouse blood flow in the human capillaries. Therefore it is feasible to form an autologous tissue flap derived from a hiPSC EC capillary network assembled in vitro, and functionally connect to a vascular pedicle in vivo that could be utilized in complex wound repair for chronic or acute wounds.
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Affiliation(s)
- Anne M Kong
- O'Brien Institute Dept. of St Vincent's Institute, Melbourne, Australia
| | - Kiryu K Yap
- O'Brien Institute Dept. of St Vincent's Institute, Melbourne, Australia; Univ. of Melbourne, Dept. of Surgery at St Vincent's Hospital, Melbourne, Australia; Department of Plastic and Reconstructive Surgery, St Vincent's Hospital, Melbourne, Australia
| | - Shiang Y Lim
- O'Brien Institute Dept. of St Vincent's Institute, Melbourne, Australia; Univ. of Melbourne, Dept. of Surgery at St Vincent's Hospital, Melbourne, Australia
| | - Diego Marre
- O'Brien Institute Dept. of St Vincent's Institute, Melbourne, Australia
| | - Alice Pébay
- Department of Surgery, The University of Melbourne, Melbourne, Victoria 3010, Australia; Department of Anatomy and Neuroscience, The University of Melbourne, Victoria 3010, Australia
| | - Yi-Wen Gerrand
- O'Brien Institute Dept. of St Vincent's Institute, Melbourne, Australia
| | - Jarmon G Lees
- O'Brien Institute Dept. of St Vincent's Institute, Melbourne, Australia
| | - Jason A Palmer
- O'Brien Institute Dept. of St Vincent's Institute, Melbourne, Australia
| | - Wayne A Morrison
- O'Brien Institute Dept. of St Vincent's Institute, Melbourne, Australia; Univ. of Melbourne, Dept. of Surgery at St Vincent's Hospital, Melbourne, Australia; Faculty of Health Sciences, Australian Catholic University, Fitzroy, Melbourne, Australia; Department of Plastic and Reconstructive Surgery, St Vincent's Hospital, Melbourne, Australia
| | - Geraldine M Mitchell
- O'Brien Institute Dept. of St Vincent's Institute, Melbourne, Australia; Univ. of Melbourne, Dept. of Surgery at St Vincent's Hospital, Melbourne, Australia; Faculty of Health Sciences, Australian Catholic University, Fitzroy, Melbourne, Australia.
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233
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Cheng X, Chen Y, Dai S, Bilek MMM, Bao S, Ye L. Bending shape memory behaviours of carbon fibre reinforced polyurethane-type shape memory polymer composites under relatively small deformation: Characterisation and computational simulation. J Mech Behav Biomed Mater 2019; 100:103372. [PMID: 31369958 DOI: 10.1016/j.jmbbm.2019.103372] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 06/30/2019] [Accepted: 07/24/2019] [Indexed: 11/19/2022]
Abstract
Shape memory polyurethanes (SMPU) have been of great interest in biomedical applications because of their unique ability to recover a primary shape by external actuation. This advantage can allow for easy suture and minimum tissue damage caused by surgery. Since SMPU suffer from low stiffness and low strength, carbon fibres have been widely used to reinforce SMPU, and their shape memory properties have been investigated using thermomechanical tensile tests. In reality, however, bending situations are more common than tensile situations, such as human skulls. In this study, carbon fibre reinforced SMPU (CF/SMPU) composites were studied as promising cranial implants that can offer shape memory properties, shape flexibility and high strength. First, the basic properties of pristine SMPU and CF/SMPU composites were characterised, including glass transition temperature (Tg), the viscosity of SMPU, the morphology of CF/SMPU, and their tensile and flexural mechanical properties. Then, a new method using rheometer was developed to study the shape memory behaviours of SMPU and CF/SMPU with three-point bending under relatively small deformations (≤1%), including flexural stress during programming and cooling, and bending recovery force during shape recovery. Finally, due to the invisibility of recovery process that was conducted in an enclosed temperature-controlling chamber of rheometer, the finite element method (FEM) was used to simulate the bending recovery test. The results showed carbon fibres significantly enhanced the mechanical properties (Young's modulus and flexural modulus) of SMPU. In terms of bending shape recovery, compared to pristine SMPU, CF/SMPU composites obtained substantially higher flexural stress during programming and cooling processes, and larger, more stable recovery force during recovery. The FEM results consolidated the peak recovery force of SMPU and the continuously growing recovery force of CF/SMPU as the temperature increased. Our findings on the improved mechanical and shape memory properties can provide a solid foundation for the potential applications of CF/SMPU composites as cranial implants.
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Affiliation(s)
- Xinying Cheng
- School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW, 2006, Australia
| | - Yuan Chen
- School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW, 2006, Australia.
| | - Shaocong Dai
- School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW, 2006, Australia
| | - Marcela M M Bilek
- Applied and Plasma Physics, School of Physics, The University of Sydney, NSW, 2006, Australia
| | - Shisan Bao
- Discipline of Pathology and School of Medical Science, The University of Sydney, NSW, 2006, Australia; Bosch Institute, The University of Sydney, NSW, 2006, Australia; Charles Perkins Centre, The University of Sydney, NSW, 2006, Australia; Tongren Hospital, Shanghai Jiaotong University School of Medicine, China
| | - Lin Ye
- School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW, 2006, Australia
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234
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Huang X, Li B, Wang L, Lai X, Xue H, Gao J. Superhydrophilic, Underwater Superoleophobic, and Highly Stretchable Humidity and Chemical Vapor Sensors for Human Breath Detection. ACS Appl Mater Interfaces 2019; 11:24533-24543. [PMID: 31246404 DOI: 10.1021/acsami.9b04304] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Humidity and chemical vapor sensors have promising applications in the field of environment protection, human healthcare, and so forth. It is still challenging to develop sensor materials that can serve as both humidity and chemical vapor sensors with high sensitivity, low detection limit, and excellent stretchability, repeatability, and reliability. In this study, a flexible, stretchable, and conductive nanofiber composite (CNC) with superhydrophilicity and underwater superoleophobicity is prepared by acidified carbon nanotube (ACNT) decoration onto the thermoplastic polyurethane (PU) nanofiber surface. ACNT introduction increases both the Young's modulus and tensile strength and almost maintains the superelasticity of the PU nanofibrous membrane. The as-obtained CNC could be used to detect both moisture and chemical vapors. When used as the humidity sensor, ACNTs can absorb surrounding water molecules and thus increase their resistance. On the other hand, the PU can be swollen by different chemical vapors, which can, to a different extent, damage the conductive network inside the composite and cause the increase of the composite resistance. The CNC can be integrated with a mask for real-time detection of human respiration. The CNC-based chemical vapor sensor possesses low detection limit, quick response, good selectivity, and excellent recyclability (even in a high humid environment) and has potential applications in monitoring biomarker gases from human breath.
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Affiliation(s)
- Xuewu Huang
- School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou , Jiangsu 225002 , China
| | - Bei Li
- School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou , Jiangsu 225002 , China
| | - Ling Wang
- School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou , Jiangsu 225002 , China
| | - Xuejun Lai
- College of Materials Science and Engineering, Key Laboratory of Guangdong Province for High Property and Functional Polymer Materials , South China University of Technology , Guangzhou 510641 , P. R. China
| | - Huaiguo Xue
- School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou , Jiangsu 225002 , China
| | - Jiefeng Gao
- School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou , Jiangsu 225002 , China
- State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu , Sichuan 610065 , P. R. China
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235
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Wang Y, Yang Y, Zhang Y, Tan F, Li Q, Zhao H, Xie Q, Chen J. Polyurethane heat preservation materials: The significant sources of organophosphorus flame retardants. Chemosphere 2019; 227:409-415. [PMID: 31003125 DOI: 10.1016/j.chemosphere.2019.04.085] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 04/09/2019] [Accepted: 04/11/2019] [Indexed: 06/09/2023]
Abstract
The concentrations and compositions of organophosphorus flame retardants (OPFRs) in various heat preservation materials from different brands and types in China were investigated, as well as their OPFR burdens and emission amounts. The average concentrations of ΣOPFRs were 41.4 ± 10.2, (7.1 ± 4.0) × 104, and 56.3 ± 19.3 μg/g in phenolic foams (PF), polyurethane foams (PUR), and extruded polystyrene boards (XPS), respectively. OPFRs in the PUR materials were ∼3 orders of magnitude higher than those in the other two materials, suggesting that organophosphate esters were added as flame retardants (FRs) in the PUR materials. Obvious variations in the concentrations and compositions of OPFRs were discovered in those heat preservation materials due to their material types, brands, and fire-ratings, as well as contaminations. TCIPP was the most dominant OPFR with a range from 22.3 (in PF) to 6.73 × 104 (in PUR) μg/g, which emphasized that TCIPP was the most commonly used flame retardant additives in China. Based on the OPFR concentrations, OPFR emission rates, and application amounts of heat preservation materials, we calculated the total burdens of OPFRs in those materials and their emission amounts in China. The potential total burden of OPFRs in the completed new buildings of China in 2017 was estimated to be ∼(2.37 ± 1.11) × 104 t, while the total emission of OPFRs from those new materials was ∼3.19 ± 1.65 t/y. As significant sources of OPFRs, the heat preservation materials used in exterior or interior walls may pose potential health risks to humans.
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Affiliation(s)
- Yan Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
| | - Ya Yang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Yuwei Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Feng Tan
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Qilu Li
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang, Henan, 453007, PR China
| | - Hongxia Zhao
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Qing Xie
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Jingwen Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
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236
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Tromp PC, Beeltje H, Okeme JO, Vermeulen R, Pronk A, Diamond ML. Calibration of polydimethylsiloxane and polyurethane foam passive air samplers for measuring semi volatile organic compounds using a novel exposure chamber design. Chemosphere 2019; 227:435-443. [PMID: 31003128 DOI: 10.1016/j.chemosphere.2019.04.043] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 04/04/2019] [Accepted: 04/06/2019] [Indexed: 05/23/2023]
Abstract
Passive air sampling is increasingly used for air quality monitoring and for personal sampling. In a novel experimental exposure chamber study, 3 types of polydimethylsiloxane (PDMS, including sheet and wristband) and 1 type of polyurethane foam (PUF) passive air samplers were tested for gas-phase uptake of 200 semi volatile organic compounds (SVOCs) during six months. For 155 SVOCs including PAH, PCB, phthalates, organophosphate esters, musk compounds, organochlorine- and other pesticides, a normalized generic uptake rate (Rs) of 7.6 ± 1.3 m3 d-1 dm-2 and a generic mass transfer coefficient (MTC) of 0.87 ± 0.15 cm s-1 at a wind speed of 1.3 m s-1 were determined. Variability of sampling rates within and between passive sampling media and analyte groups was not statistically significant, supporting the hypothesis of air-side controlled uptake regardless of sampling material. A statistical relationship was developed between the sampling rate and windspeed which can be used to obtain a sampling rate applicable to specific deployment conditions. For 98 SVOCs, partition coefficients (Ksampler-air) for PUF and PDMS were obtained, which determine the duration of linear uptake and capacity of the sampler for gas-phase uptake. Ksampler-air for PDMS were approximately 10 times higher than for PUF, suggesting that PDMS can be deployed for longer time per volume of sampler, while uptake remains in the linear phase. Statistical relationships were developed to estimate Kpuf-air and Kpdms-air from Koa. These results improve the understanding of the performance of PDMS and PUF passive samplers and contribute to the development of PDMS for the use as a promising personal sampler.
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Affiliation(s)
- Peter C Tromp
- Netherlands Organization for Applied Research, TNO, Utrecht, the Netherlands.
| | - Henry Beeltje
- Netherlands Organization for Applied Research, TNO, Utrecht, the Netherlands
| | - Joseph O Okeme
- Department of Physical and Environmental Science, University of Toronto Scarborough, 1265 Military Trail Toronto, Ontario, M1C 1A4, Canada; Occupational Cancer Research Centre, Cancer Care Ontario, 525 University Avenue, Toronto, Ontario, M5G 1X3, Canada
| | - Roel Vermeulen
- IRAS - Institute for Risk Assessment Sciences, Julius Center, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Anjoeka Pronk
- Netherlands Organization for Applied Research, TNO, Utrecht, the Netherlands
| | - Miriam L Diamond
- Department of Physical and Environmental Science, University of Toronto Scarborough, 1265 Military Trail Toronto, Ontario, M1C 1A4, Canada; Department of Earth Sciences, 22 Russell Street, University of Toronto, Toronto, Ontario, M5S 3B1, Canada
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237
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Osaki S, Kintoki T, Moriuchi-Kawakami T, Kitamura K, Wakida SI. Investigation of Polyurethane Matrix Membranes for Salivary Nitrate ISFETs to Prevent the Drift. Sensors (Basel) 2019; 19:s19122713. [PMID: 31212895 PMCID: PMC6630929 DOI: 10.3390/s19122713] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 06/05/2019] [Accepted: 06/14/2019] [Indexed: 12/04/2022]
Abstract
We have investigated human-stress monitoring by making use of salivary nitrate, which can be a candidate for stress markers, with ion-selective field-effect transistors (ISFETs). ISFETs are suitable for on-site single-drop analysis of salivary nitrate within 10 s. However, when ISFETs are used for salivary nitrate, ISFETs have a problem that is called the initial drift. The initial drift makes accurate nitrate monitoring difficult. Thus, the purpose of this study is to prevent the initial drift and to search for a new, simple polymer to possess a better performance of sensor responses than conventional matrix membranes, such as PVC. In this research, we investigated ISFETs using specific matrix membranes, for example KP-13, Pellethane®, and P7281-PU. The initial drift was evaluated from the fluctuations of the response values generated by the ISFETs when immersed in saliva or aqueous solution. As a result, P7281-PU showed a prevention effect on the initial drift, both in the whole saliva and in various solutions. Furthermore, the cause of drift may be H+ diffusion, and the drift prevention effect of P7281-PU may be affected by urethane bond capturing H+ in the ion-selective membrane. This result suggests that a continuous nitrate monitoring is feasible and may be applied to wearable sensors.
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Affiliation(s)
- Shuto Osaki
- Aist-Osaka University Advanced Photonics and Biosensing Open Innovation Laboratory, AIST, Suita 565-0043, Japan.
- Department of Applied Physics, Graduate School of Engineering, Osaka University, Suita 565-0043, Japan.
| | - Takuya Kintoki
- Aist-Osaka University Advanced Photonics and Biosensing Open Innovation Laboratory, AIST, Suita 565-0043, Japan.
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Institute of Technology, Osaka 535-8585, Japan.
| | - Takayo Moriuchi-Kawakami
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Institute of Technology, Osaka 535-8585, Japan.
| | - Kenichi Kitamura
- National Institute of Technology, Toba College, Toba 517-8501, Japan.
| | - Shin-Ichi Wakida
- Aist-Osaka University Advanced Photonics and Biosensing Open Innovation Laboratory, AIST, Suita 565-0043, Japan.
- Department of Applied Physics, Graduate School of Engineering, Osaka University, Suita 565-0043, Japan.
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238
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Bužarovska A, Dinescu S, Lazar AD, Serban M, Pircalabioru GG, Costache M, Gualandi C, Avérous L. Nanocomposite foams based on flexible biobased thermoplastic polyurethane and ZnO nanoparticles as potential wound dressing materials. Mater Sci Eng C Mater Biol Appl 2019; 104:109893. [PMID: 31500045 DOI: 10.1016/j.msec.2019.109893] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 05/26/2019] [Accepted: 06/12/2019] [Indexed: 11/16/2022]
Abstract
In the present study biobased and soft thermoplastic polyurethane (TPU), obtained by polymerization from fatty acids, was used to produce TPU/ZnO nanocomposite foams by thermally induced phase separation method (TIPS). The produced foams were characterized and evaluated regarding their potential uses as wound dressing materials. The structure and morphology of the prepared flexible polymer foams with different content of ZnO nanofiller (1, 2, 5 and 10 wt% related to the polymer) were studied by Fourier transform infrared spectroscopy (FTIR) and Scanning electron microscopy (SEM). Highly porous nanocomposite structure made of interconnected pores with dimensions between 10 and 60 μm was created allowing water vapor transmission rate (WVTR) up to 8.9 mg/cm2·h. The TPU/ZnO foams, tested for their ability to support cells and their growth, showed highest cell proliferation for TPU nanocomposite foams with 2 and 5 wt% ZnO. Overall, the nanocomposite foams displayed a low cytotoxic potential (varied proportionally to the ZnO content) and good biocompatibility. All tested nanocomposite foams were found to be significantly active against biofilms formed by different Gram-positive (Enterococcus faecalis and Staphylococcus aureus) and Gram-negative (Escherichia coli and Pseudomonas aeruginosa) bacteria. Based on their behaviors, flexible TPU/ZnO nanocomposite foams can be considered for biomedical applications such as potential active wound dressing.
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Affiliation(s)
- Aleksandra Bužarovska
- Faculty of Technology and Metallurgy, Sts Cyril and Methodius University, Rudjer Boskovic 16, 1000 Skopje, Macedonia.
| | - Sorina Dinescu
- Department of Biochemistry and Molecular Biology, University of Bucharest, Spl. Independentei 91-95, 050095 Bucharest, Romania
| | - Andreea D Lazar
- Department of Biochemistry and Molecular Biology, University of Bucharest, Spl. Independentei 91-95, 050095 Bucharest, Romania
| | - Mirela Serban
- Department of Biochemistry and Molecular Biology, University of Bucharest, Spl. Independentei 91-95, 050095 Bucharest, Romania
| | - Gratiela G Pircalabioru
- Research Institute of University of Bucharest, University of Bucharest, Spl. Independentei 91-95, 050095 Bucharest, Romania
| | - Marieta Costache
- Department of Biochemistry and Molecular Biology, University of Bucharest, Spl. Independentei 91-95, 050095 Bucharest, Romania
| | - Chiara Gualandi
- Department of Chemistry "G. Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy; Advanced Mechanics and Materials - Interdepartmental Center, University of Bologna, Viale del Risorgimento 2, 40123 Bologna, Italy
| | - Luc Avérous
- BioTeam/ICPEES-ECPM, UMR CNRS 7515, Université de Strasbourg, 67087 Strasbourg Cedex 2, France
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239
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Watanabe M, Takeda Y, Maruyama T, Ikeda J, Kawai M, Mitsumata T. Chain Structure in a Cross-Linked Polyurethane Magnetic Elastomer Under a Magnetic Field. Int J Mol Sci 2019; 20:E2879. [PMID: 31200473 PMCID: PMC6627056 DOI: 10.3390/ijms20122879] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 06/03/2019] [Accepted: 06/11/2019] [Indexed: 11/29/2022] Open
Abstract
The morphology of magnetic particles with a size of 7.0 μm was observed for magnetic elastomers with a concentration of magnetic particles of 70 wt% using an X-ray microscope remolded into high resolution. Computed tomography images revealed that magnetic particles were distributed isotopically in the absence of a magnetic field, but they formed a chain structure in the polyurethane network under a magnetic field of 270 mT. It was also established, by image analysis, that magnetic elastomers had an anisotropic structure under the magnetic field.
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Affiliation(s)
- Mayuko Watanabe
- Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan.
- ALCA, Japan Science and Technology Agency, Tokyo 102-0076, Japan.
| | | | | | - Junko Ikeda
- Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan.
- Nihon Rufuto Corporation, Tokyo 110-0015, Japan.
| | - Mika Kawai
- Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan.
- ALCA, Japan Science and Technology Agency, Tokyo 102-0076, Japan.
| | - Tetsu Mitsumata
- Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan.
- ALCA, Japan Science and Technology Agency, Tokyo 102-0076, Japan.
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240
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Wang C, Zolotarskaya O, Ashraf KM, Wen X, Ohman DE, Wynne KJ. Surface Characterization, Antimicrobial Effectiveness, and Human Cell Response for a Biomedical Grade Polyurethane Blended with a Mixed Soft Block PTMO-Quat/PEG Copolyoxetane Polyurethane. ACS Appl Mater Interfaces 2019; 11:20699-20714. [PMID: 31117452 DOI: 10.1021/acsami.9b04697] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Infection is a serious medical complication associated with health care environments. Despite advances, the 5-10% incidence of infections for hospital patients is well documented. Sources of pathogenic organisms include medical devices such as catheters and endotracheal tubes. Offering guidance for curbing the spread of such infections, a model antimicrobial coating is described herein that kills bacteria on contact but is compatible with human cells. To achieve these characteristics, a novel blend of a conventional biomedical grade polyurethane (Tecoflex) with mixed soft block polyurethane is described. The functional polyurethane (UP-C12-50-T) has a copolyoxetane soft block P-C12-50 with quaternary ammonium (C12) and PEG-like side chains and a conventional poly(tetramethylene oxide) (PTMO, T) soft block. DSC and DMA data point to limited miscibility of UP-C12-50-T with Tecoflex. The blend of Tecoflex with 10 wt % UP-C12-50-T designated UP-C12-50-T-10 radically changed surface properties. Evidence for surface concentration of the P-C12-50 soft block was obtained by atomic force microscopy (AFM), dynamic contact angles (DCAs), zeta potentials (ζ), and X-ray photoelectron spectroscopy (XPS). The antimicrobial effectiveness of the blend coatings was established by the ASTM E2149 "shake flask" test for challenges of E. coli and a methicillin resistant strain of S. epidermidis. Cytocompatibility was demonstrated with an in vitro test designed for direct contact (ISO 10993-5). Growth of human mesenchymal stem cells (MSCs) beside and under UP-C12-50-T-10 indicated remarkable biocompatibility for a composition that is also strongly antimicrobial. Overall, the results point to a model coating with a level of P-C12-50 that combines high antimicrobial effectiveness and low toxicity to human cells.
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Affiliation(s)
- Chenyu Wang
- Department of Chemical and Life Science Engineering , Virginia Commonwealth University , Biotech8, 737 North Fifth Street , Richmond , Virginia 23219 , United States
| | - Olga Zolotarskaya
- Department of Chemical and Life Science Engineering , Virginia Commonwealth University , Biotech8, 737 North Fifth Street , Richmond , Virginia 23219 , United States
| | - Kayesh M Ashraf
- Department of Chemical and Life Science Engineering , Virginia Commonwealth University , Biotech8, 737 North Fifth Street , Richmond , Virginia 23219 , United States
| | - Xuejun Wen
- Department of Chemical and Life Science Engineering , Virginia Commonwealth University , Biotech8, 737 North Fifth Street , Richmond , Virginia 23219 , United States
- Institute for Engineering and Medicine, Department of Chemical and Life Science Engineering , Virginia Commonwealth University , 601 West Main Street, Room # 403 , Richmond , Virginia 23284-3028 , United States
| | - Dennis E Ohman
- Department of Microbiology and Immunology , VCU School of Medicine , 1101 East Marshall Street , Richmond , Virginia 23298 , United States
- McGuire Veterans Affairs Medical Center , Richmond , Virginia 23249 , United States
| | - Kenneth J Wynne
- Department of Chemical and Life Science Engineering , Virginia Commonwealth University , Biotech8, 737 North Fifth Street , Richmond , Virginia 23219 , United States
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Lutzweiler G, Barthes J, Koenig G, Kerdjoudj H, Mayingi J, Boulmedais F, Schaaf P, Drenckhan W, Vrana NE. Modulation of Cellular Colonization of Porous Polyurethane Scaffolds via the Control of Pore Interconnection Size and Nanoscale Surface Modifications. ACS Appl Mater Interfaces 2019; 11:19819-19829. [PMID: 31074959 DOI: 10.1021/acsami.9b04625] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Full-scale cell penetration within porous scaffolds is required to obtain functional connective tissue components in tissue engineering applications. For this aim, we produced porous polyurethane structures with well-controlled pore and interconnection sizes. Although the influence of the pore size on cellular behavior is widely studied, we focused on the impact of the size of the interconnections on the colonization by NIH 3T3 fibroblasts and Wharton's jelly-derived mesenchymal stem cells (WJMSCs). To render the material hydrophilic and allow good material wettability, we treated the material either by plasma or by polydopamine (PDA) coating. We show that cells weakly adhere on these surfaces. Keeping the average pore diameter constant at 133 μm, we compare two structures, one with LARGE (52 μm) and one with SMALL (27 μm) interconnection diameters. DNA quantification and extracellular matrix (ECM) production reveal that larger interconnections is more suitable for cells to move across the scaffold and form a three-dimensional cellular network. We argue that LARGE interconnections favor cell communication between different pores, which then favors the production of the ECM. Moreover, PDA treatment shows a truly beneficial effect on fibroblast viability and on matrix production, whereas plasma treatment shows the same effect for WJMSCs. We, therefore, claim that both pore interconnection size and surface treatment play a significant role to improve the quality of integration of tissue engineering scaffolds.
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Affiliation(s)
- G Lutzweiler
- Institut National de la Santé et de la Recherche Medicale, UMR_S 1121 , 11 rue Humann , 67085 Strasbourg Cedex , France
- Faculté de Chirurgie Dentaire , Université de Strasbourg , 8 rue Sainte Elisabeth , 67000 Strasbourg , France
- Université de Strasbourg, CNRS, Institut Charles Sadron , 23 rue de Loess , 67034 Strasbourg , France
| | - J Barthes
- Protip Medical SAS , 8 Place de l'Hôpital , 67000 Strasbourg , France
| | - G Koenig
- Institut National de la Santé et de la Recherche Medicale, UMR_S 1121 , 11 rue Humann , 67085 Strasbourg Cedex , France
- Faculté de Chirurgie Dentaire , Université de Strasbourg , 8 rue Sainte Elisabeth , 67000 Strasbourg , France
| | - H Kerdjoudj
- EA 4691, Biomateŕiaux et Inflammation en Site Osseux (BIOS), SFR-CAP Santé (FED4231), Université de Reims Champagne Ardenne , 51100 Reims , France
- UFR d'Odontologie, Université de Reims Champagne Ardenne , 51100 Reims , France
| | - J Mayingi
- Cetim Grand Est , 24a Rue d'Alsace , 67400 Illkirch-Graffenstaden , France
| | - F Boulmedais
- Université de Strasbourg, CNRS, Institut Charles Sadron , 23 rue de Loess , 67034 Strasbourg , France
| | - P Schaaf
- Institut National de la Santé et de la Recherche Medicale, UMR_S 1121 , 11 rue Humann , 67085 Strasbourg Cedex , France
- Faculté de Chirurgie Dentaire , Université de Strasbourg , 8 rue Sainte Elisabeth , 67000 Strasbourg , France
| | - W Drenckhan
- Université de Strasbourg, CNRS, Institut Charles Sadron , 23 rue de Loess , 67034 Strasbourg , France
| | - N E Vrana
- Protip Medical SAS , 8 Place de l'Hôpital , 67000 Strasbourg , France
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242
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Sonwani RK, Swain G, Giri BS, Singh RS, Rai BN. A novel comparative study of modified carriers in moving bed biofilm reactor for the treatment of wastewater: Process optimization and kinetic study. Bioresour Technol 2019; 281:335-342. [PMID: 30831512 DOI: 10.1016/j.biortech.2019.02.121] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 02/25/2019] [Accepted: 02/26/2019] [Indexed: 06/09/2023]
Abstract
In this work, modified plastic carriers; polypropylene (PP), low-density polyethylene- polypropylene (LDPE-PP), and polyurethane foam-polypropylene (PUF-PP) were developed and used in moving bed bioreactor (MBBR) for the wastewater treatment containing naphthalene. To optimized the process parameters using response surface methodology (RSM), two numerical variables; pH (5.0-9.0) and hydraulic retention time (HRT) (1.0-5.0 day) along with the type of carriers (PP, LDPE-PP, and PUF-PP) were selected as a categorical factor. At 7.0 pH and 5 days HRT, maximum removal efficiencies were observed to be 72.4, 84.4, and 90.2% for MBBR packed with PP, LDPE-PP, and PUF-PP carriers, respectively. Gas chromatography-mass spectrometry (GC-MS) analysis reveals catechol and 2-naphthol were observed as intermediate metabolites for naphthalene degradation. Modified Stover-Kincannon model was applied for biodegradation kinetic and constants were observed as Umax: 0.476, 0.666, and 0.769 g/L.day and KB: 0.565, 0.755, and 0.874 g/L.day for PP, LDPE-PP, PUF-PP, respectively.
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Affiliation(s)
- Ravi Kumar Sonwani
- Department of Chemical Engineering & Technology Indian Institute of Technology (BHU), Varanasi 221005, Uttar Pradesh, India
| | - Ganesh Swain
- Department of Chemical Engineering & Technology Indian Institute of Technology (BHU), Varanasi 221005, Uttar Pradesh, India
| | - Balendu Shekhar Giri
- Department of Chemical Engineering & Technology Indian Institute of Technology (BHU), Varanasi 221005, Uttar Pradesh, India
| | - Ram Sharan Singh
- Department of Chemical Engineering & Technology Indian Institute of Technology (BHU), Varanasi 221005, Uttar Pradesh, India
| | - Birendra Nath Rai
- Department of Chemical Engineering & Technology Indian Institute of Technology (BHU), Varanasi 221005, Uttar Pradesh, India.
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243
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Wang X, Jin Q, Wang L, Bai S, Mikulčić H, Vujanović M, Tan H. Synergistic effect of biomass and polyurethane waste co-pyrolysis on soot formation at high temperatures. J Environ Manage 2019; 239:306-315. [PMID: 30913481 DOI: 10.1016/j.jenvman.2019.03.073] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 03/11/2019] [Accepted: 03/16/2019] [Indexed: 06/09/2023]
Abstract
Soot is an important toxic pollutant generated during high-temperature incineration of solid waste (i.e., biomass and plastic waste) under air-lean conditions, and has a great impact on flame radiation. The main objective of this work is to study the synergistic effect of biomass and polyurethane co-pyrolysis on soot formation at high temperatures (1100-1250 °C). The effects of temperature, biomass species, and co-pyrolysis ratio on the yield, morphology, composition and reactivity of soot particles are studied. Results show that under controlled co-pyrolysis conditions, the measured soot yield from co-pyrolysis of biomass and polyurethane is lower than the theoretical value by weight average, while the particle size distribution tends to concentrate on a smaller diameter range. The degree of synergistic effect increases with the increasing biomass ratio (0-50 wt%) and decreasing pyrolysis temperature. Wood in co-pyrolysis presents a stronger synergistic effect on soot yields than straw co-pyrolysis does. Degree of synergistic effect on soot oxidation reactivity depends much on the biomass addition ratio but less on pyrolysis temperature. At 10 wt% straw addition ratio, co-pyrolysis exerts a negative synergistic effect on soot oxidation reactivity, while the synergistic effect turns significantly positive when the straw addition ratio increases to 50 wt%.
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Affiliation(s)
- Xuebin Wang
- MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Qiming Jin
- MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Liang Wang
- SINTEF Energy Research, Trondheim, Norway
| | - Shengjie Bai
- MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Hrvoje Mikulčić
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, 10000, Croatia
| | - Milan Vujanović
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, Zagreb, 10000, Croatia
| | - Houzhang Tan
- MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.
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244
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Maggira M, Deliyanni EA, Samanidou VF. Synthesis of Graphene Oxide Based Sponges and Their Study as Sorbents for Sample Preparation of Cow Milk Prior to HPLC Determination of Sulfonamides. Molecules 2019; 24:molecules24112086. [PMID: 31159316 PMCID: PMC6600354 DOI: 10.3390/molecules24112086] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 05/23/2019] [Accepted: 05/31/2019] [Indexed: 11/16/2022] Open
Abstract
In the present study, a novel, simple, and fast sample preparation technique is described for the determination of four sulfonamides (SAs), namely Sulfathiazole (STZ), sulfamethizole (SMT), sulfadiazine (SDZ), and sulfanilamide (SN) in cow milk prior to HPLC. This method takes advantage of a novel material that combines the extractive properties of graphene oxide (GO) and the known properties of common polyurethane sponge (PU) and that makes sample preparation easy, fast, cheap and efficient. The PU-GO sponge was prepared by an easy and fast procedure and was characterized with FTIR spectroscopy. After the preparation of the sorbent material, a specific extraction protocol was optimized and combined with HPLC-UV determination could be applied for the sensitive analysis of trace SAs in milk. The proposed method showed good linearity while the coefficients of determination (R2) were found to be high (0.991-0.998). Accuracy observed was within the range 90.2-112.1% and precision was less than 12.5%. Limit of quantification for all analytes in milk was 50 μg kg-1. Furthermore, the PU-GO sponge as sorbent material offered a very clean extract, since no matrix effect was observed.
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Affiliation(s)
- Martha Maggira
- Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece.
| | - Eleni A Deliyanni
- Laboratory of General and Environmental Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece.
| | - Victoria F Samanidou
- Laboratory of General and Environmental Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece.
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245
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Zhang D, Liu W, Wu XD, He X, Lin X, Wang H, Li J, Jiang J, Huang W. Efficacy of novel nano-hydroxyapatite/polyurethane composite scaffolds with silver phosphate particles in chronic osteomyelitis. J Mater Sci Mater Med 2019; 30:59. [PMID: 31127361 DOI: 10.1007/s10856-019-6261-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 05/06/2019] [Indexed: 06/09/2023]
Abstract
Recently, chronic osteomyelitis is still a challenging surgical problem. Unfortunately, the traditional clinical method using bone cement loaded antibiotics is restricted due to its non-biodegradability and limited release of antibiotics. Hydroxyapatite is a good adsorbent with good biocompatibility, an ideal bone repair material, and can avert the requirement for the secondary surgical procedure of removal. In this study, nano-hydroxyapatite combined with a polyurethane containing 3% silver (Ag/n-HA/PU) was synthesized, and investigated for its efficacy of treating chronic bone infection with bone defects. To clarify its silver ions release characteristics, the concentration of the Ag+ in the elution was analyzed every day after in vitro deionized water immersion. A chronic osteomyelitis of tibia in rabbit model was established, and 70 New Zealand rabbits were divided into 4 groups, including the blank control group, nano-hydroxyapatite combined with polyurethane (n-HA/PU) implant group, 3% Ag/n-HA/PU group and 10% Ag/n-HA/PU group after debridement. Routine blood tests, radiography, Micro-CT, and histological staining were conducted at 4 days, 3, 6 and 12 weeks post-treatment. The results showed that the released silver from the 3% Ag/n-HA/PU and 10% Ag/n-HA/PU exhibited an initial burst release and followed by a slow controlled release up to 39 days and 42 days respectively. A good repair of bone defects, an appropriate rate of degradation of scaffolds and no significant toxicity were observed in the 3% Ag/n-HA/PU group, indicating the advantages of this novel synthetic scaffold to be a potential option for the treatment of chronic osteomyelitis. A novel nano-composite, nano-hydroxyapatite combined with a polyurethane containing 3% silver (Ag/n-HA/PU) provide controlled release of Ag+, illustrated by its abilities of biodegradation, antimicrobial activity, and favorable repair of bone defects in the treatment of chronic osteomyelitis.
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Affiliation(s)
- Dongli Zhang
- Department of orthopedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Wen Liu
- Department of orthopedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Xiang-Dong Wu
- Department of orthopedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Xiaoqiang He
- Department of orthopedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Xiao Lin
- Department of orthopedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Han Wang
- Department of orthopedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Jidong Li
- Research Center for Nano-Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu, 610064, China
| | - Jiaxing Jiang
- Research Center for Nano-Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu, 610064, China
| | - Wei Huang
- Department of orthopedic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China.
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246
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Borcan F, Chirita-Emandi A, Andreescu NI, Borcan LC, Albulescu RC, Puiu M, Tomescu MC. Synthesis and preliminary characterization of polyurethane nanoparticles with ginger extract as a possible cardiovascular protector. Int J Nanomedicine 2019; 14:3691-3703. [PMID: 31190819 PMCID: PMC6535673 DOI: 10.2147/ijn.s202049] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 03/06/2019] [Indexed: 01/28/2023] Open
Abstract
Background and aim: The extract of ginger, obtained from the rhizome of Zingiber officinale, contains 6-gingerol, 6-shogaol, 8-gingerol, and 10-gingerol. It has many therapeutic effects such as being chemopreventive against stroke and heart diseases, malabsorption, bacterial infections, indigestion, and nausea, which have been observed since ancient times. The main aim of this study is to evaluate the polyurethane (PU) as a proper material for the hollow nanoparticles' preparation. Methods: The PU nanoparticles were obtained by a spontaneous emulsification, in the presence of a nonionic surfactant, combined with an interfacial polyaddition process between an aliphatic diisocyanate and different mixtures of etheric and esteric polyols. The synthesis was done without any PU additives, such as catalysts, blowing agents, chains promoters, cross-linking agents, and stabilizers. Results: The particles present almost neutral pH values and low water solubility. They are heat resistant up to 280°C. Decreased irritation level was found in the assay of PU nanoparticles loaded with pure ginger extract (GE) on the murine skin tests than the irritation level recorded for pure GE. Conclusion: This research shows the reduced noxiousness of these PU nanoparticles and consequently the possibility of their use as a possible cardiovascular protector.
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Affiliation(s)
- Florin Borcan
- The 1st Department (Analytical Chemistry), Faculty of Pharmacy, “Victor Babes” University of Medicine and Pharmacy, Timisoara, Romania
| | - Adela Chirita-Emandi
- The 2nd Department (Genetics), Faculty of Medicine, “Victor Babes” University of Medicine and Pharmacy, Timisoara, Romania
- Center of Genomic Medicine, “Victor Babes” University of Medicine and Pharmacy, Timisoara, Romania
| | - Nicoleta Ioana Andreescu
- The 2nd Department (Genetics), Faculty of Medicine, “Victor Babes” University of Medicine and Pharmacy, Timisoara, Romania
- Center of Genomic Medicine, “Victor Babes” University of Medicine and Pharmacy, Timisoara, Romania
| | - Livia-Cristina Borcan
- The 5th Department (Internal Medicine I), Faculty of Medicine, “Victor Babes” University of Medicine and Pharmacy, Timisoara, Romania
| | - Ramona Carmen Albulescu
- The 11th Department (Pediatrics), Faculty of Medicine, “Victor Babes” University of Medicine and Pharmacy, Timisoara, Romania
| | - Maria Puiu
- The 2nd Department (Genetics), Faculty of Medicine, “Victor Babes” University of Medicine and Pharmacy, Timisoara, Romania
- Center of Genomic Medicine, “Victor Babes” University of Medicine and Pharmacy, Timisoara, Romania
| | - Mirela Cleopatra Tomescu
- The 5th Department (Internal Medicine I), Faculty of Medicine, “Victor Babes” University of Medicine and Pharmacy, Timisoara, Romania
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247
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Lauberte L, Fabre G, Ponomarenko J, Dizhbite T, Evtuguin DV, Telysheva G, Trouillas P. Lignin Modification Supported by DFT-Based Theoretical Study as a Way to Produce Competitive Natural Antioxidants. Molecules 2019; 24:molecules24091794. [PMID: 31075868 PMCID: PMC6539611 DOI: 10.3390/molecules24091794] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 05/04/2019] [Accepted: 05/08/2019] [Indexed: 11/25/2022] Open
Abstract
The valorization of lignins as renewable aromatic feedstock is of utmost importance in terms of the use of sustainable resources. This study provides a deductive approach towards market-oriented lignin-derived antioxidants by ascertaining the direct effect of different structural features of lignin on the reactivity of its phenolic OH groups in the radical scavenging reactions. The antioxidant activity of a series of compounds, modeling lignin structural units, was experimentally characterized and rationalized, using thermodynamic descriptors. The calculated O–H bond dissociation enthalpies (BDE) of characteristic lignin subunits were used to predict the modification pathways of technical lignins. The last ones were isolated by soda delignification from different biomass sources and their oligomeric fractions were studied as a raw material for modification and production of optimized antioxidants. These were characterized in terms of chemical structure, molecular weight distribution, content of the functional groups, and the antioxidant activity. The developed approach for the targeted modification of lignins allowed the products competitive with two commercial synthetic phenolic antioxidants in both free radical scavenging and stabilization of thermooxidative destruction of polyurethane films.
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Affiliation(s)
- Liga Lauberte
- Latvian State Institute of Wood Chemistry, Dzerbenes Str. 27, LV-1006 Riga, Latvia.
| | - Gabin Fabre
- INSERM UMR 1248, Université de Limoges, Faculté de Pharmacie, 2 rue du Docteur Marcland, 87025 Limoges Cedex, France.
| | | | - Tatiana Dizhbite
- Latvian State Institute of Wood Chemistry, Dzerbenes Str. 27, LV-1006 Riga, Latvia.
| | - Dmitry V Evtuguin
- CICECO/University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - Galina Telysheva
- Latvian State Institute of Wood Chemistry, Dzerbenes Str. 27, LV-1006 Riga, Latvia.
| | - Patrick Trouillas
- INSERM UMR 1248, Université de Limoges, Faculté de Pharmacie, 2 rue du Docteur Marcland, 87025 Limoges Cedex, France.
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University, tř. 17 listopadu 12, 771 46 Olomouc, Czech Republic.
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248
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Bae CW, Toi PT, Kim BY, Lee WI, Lee HB, Hanif A, Lee EH, Lee NE. Fully Stretchable Capillary Microfluidics-Integrated Nanoporous Gold Electrochemical Sensor for Wearable Continuous Glucose Monitoring. ACS Appl Mater Interfaces 2019; 11:14567-14575. [PMID: 30942999 DOI: 10.1021/acsami.9b00848] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Biosensor systems for wearable continuous monitoring are desired to be developed into conformal patch platforms. However, developing such patches is very challenging owing to the difficulty of imparting materials and components with both high stretchability and high performance. Herein, we report a fully stretchable microfluidics-integrated glucose sensor patch comprised of an omnidirectionally stretchable nanoporous gold (NPG) electrochemical biosensor and a stretchable passive microfluidic device. A highly electrocatalytic NPG electrode was formed on a stress-absorbing 3D micropatterned polydimethylsiloxane (PDMS) substrate to confer mechanical stretchability, high sensitivity, and durability in non-enzymatic glucose detection. A thin, stretchable, and tough microfluidic device was made by embedding stretchable cotton fabric as a capillary into a thin polyurethane nanofiber-reinforced PDMS channel, enabling collection and passive, accurate delivery of sweat from skin to the electrode surface, with excellent replacement capability. The integrated glucose sensor patch demonstrated excellent ability to continuously and accurately monitor the sweat glucose level.
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249
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Chen SH, Chou PY, Chen ZY, Lin FH. Electrospun Water-Borne Polyurethane Nanofibrous Membrane as a Barrier for Preventing Postoperative Peritendinous Adhesion. Int J Mol Sci 2019; 20:E1625. [PMID: 30939838 PMCID: PMC6480376 DOI: 10.3390/ijms20071625] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 03/26/2019] [Accepted: 03/26/2019] [Indexed: 12/31/2022] Open
Abstract
Peritendinous adhesion is a major complication after tendon injury and the subsequent repairs or reconstructions. The degree of adhesion can be reduced by the interposition of a membranous barrier between the traumatized tendon and the surrounding tissue. In the present study, electrospun water-borne polyurethane (WPU) nanofibrous membranes (NFMs) were created for use after the reparation or reconstruction of tendons to reduce adhesion. In the electrospinning process, water was employed as the solvent for WPU, and this solvent was ecofriendly and nontoxic. The nanofibrous architecture and pore size of the WPU NFMs were analyzed. Their microporosity (0.78⁻1.05 µm) blocked the penetration of fibroblasts, which could result in adhesion and scarring around the tendon during healing. The release of WPU mimicked the lubrication effect of the synovial fluid produced by the synovium around the tendon. In vitro cell studies revealed that the WPU NFMs effectively reduced the number of fibroblasts that became attached and that there was no significant cytotoxicity. In vivo studies with the rabbit flexor tendon repair model revealed that WPU NFMs reduced the degree of peritendinous adhesion, as determined using a gross examination; a histological cross section evaluation; and measurements of the range of motion of interphalangeal joints (97.1 ± 14.7 and 79.0 ± 12.4 degrees in proximal and distal interphalangeal joints respectively), of the length of tendon excursion (11.6 ± 1.9 cm), and of the biomechanical properties.
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Affiliation(s)
- Shih-Heng Chen
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei 100, Taiwan.
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Chang Gung University and Medical College, Taoyuan 333, Taiwan.
| | - Pang-Yun Chou
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Chang Gung University and Medical College, Taoyuan 333, Taiwan.
| | - Zhi-Yu Chen
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei 100, Taiwan.
- Division of Biomedical Engineering and Nanomedicine Research, National Health Research Institutes, Miaoli 35053, Taiwan.
| | - Feng-Huei Lin
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei 100, Taiwan.
- Division of Biomedical Engineering and Nanomedicine Research, National Health Research Institutes, Miaoli 35053, Taiwan.
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Jia X, Miron RJ, Yin C, Xu H, Luo T, Wang J, Jia R, Wu M, Zhang Y, Li Y. HnRNPL inhibits the osteogenic differentiation of PDLCs stimulated by SrCl 2 through repressing Setd2. J Cell Mol Med 2019; 23:2667-2677. [PMID: 30746871 PMCID: PMC6433863 DOI: 10.1111/jcmm.14166] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 12/29/2018] [Indexed: 12/31/2022] Open
Abstract
Osteoporosis has been shown to intensify bone loss caused by periodontitis and both share common risk factors. One strategy utilized to manage the disease has been via the release of Sr ions by Strontium Ranelate having a direct effect on preventing osteoclast activation and promoting osteoblast differentiation. Previously we have developed and characterized porous Sr-mesoporous bioactive glass (Sr-MBG) scaffolds and demonstrated their ability to promote periodontal regeneration when compared to MBG alone. Our group further discovered a splicing factor, heterogeneous nuclear ribonucleoprotein L (hnRNPL), was drastically down-regulated in periodontal ligament stem cells (PDLCs) stimulated by Sr through the activation of AKT pathway. Furthermore, hnRNPL restrained the osteogenic differentiation of PDLCs through down-regulating H3K36me3-specific methyltransferase Setd2. The goal of the present study was to investigate the mechanism of periodontal regeneration stimulated by Sr It was first found that the epigenetic mechanism of splicing factor hnRNPL participated in the osteogenesis processing of PDLCs stimulated by SrCl2 . Meanwhile, the different role of hnRNPL and SET domain containing 2 (Setd2) may provide some implication of the treatment of periodontitis patients simultaneously suffering from osteoporosis.
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Affiliation(s)
- Xiaoshi Jia
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of EducationWuhan UniversityWuhanPeople's Republic of China
| | - Richard J. Miron
- Department of Periodontology, Cell Therapy Institute, College of Dental MedicineNova Southeastern UniversityFort LauderdaleFlorida
| | - Chengcheng Yin
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of EducationWuhan UniversityWuhanPeople's Republic of China
| | - Hudi Xu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of EducationWuhan UniversityWuhanPeople's Republic of China
| | - Tao Luo
- Key Laboratory of Oral MedicineGuangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical UniversityGuangzhouChina
| | - Jiwei Wang
- Key Laboratory of Oral MedicineGuangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical UniversityGuangzhouChina
| | - Rong Jia
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of EducationWuhan UniversityWuhanPeople's Republic of China
| | - Min Wu
- Hubei Key Laboratory of Cell Homeostasis, Hubei Key Laboratory of Developmentally Originated Disease, Department of Biochemistry and Molecular Biology, College of Life SciencesWuhan UniversityWuhanChina
| | - Yufeng Zhang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of EducationWuhan UniversityWuhanPeople's Republic of China
| | - Yuhong Li
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei‐MOST) & Key Laboratory of Oral Biomedicine Ministry of EducationWuhan UniversityWuhanPeople's Republic of China
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