1
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Min G, Wang W, Li H, Wang T, Li C, Xu S, Xu K, Shang Y, Zhao X, Khandelwal G, Jiao X, Tang W. Optimizing Droplet-Based Electricity Generator via a Low Sticky Hydrophobic Droplet-Impacted Surface. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2402765. [PMID: 38940416 DOI: 10.1002/smll.202402765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Revised: 06/10/2024] [Indexed: 06/29/2024]
Abstract
Droplet-based electricity generators (DEGs) are increasingly recognized for their potential in converting renewable energy sources. This study explores the interplay of surface hydrophobicity and stickiness in improving DEG efficiency. It find that the high-performance C-WaxDEGs leverage both these properties. Specifically, DEGs incorporating polydimethylsiloxane (PDMS) with carnauba wax (C-wax) exhibit increased output as surface stickiness decreases. Through experimental comparisons, PDMS with 1wt.% C-wax demonstrated a significant power output increase from 0.07 to 1.2 W m- 2, which attribute to the minimized adhesion between water molecules and the polymer surface, achieved by embedding C-wax into PDMS surface to form microstructures. This improvement in DEG performance is notable even among samples with similar surface potentials and contact angles, suggesting that C-wax's primary contribution is in reducing surface stickiness rather than altering other surface properties. The further investigations into the C-WaxDEG variant with 1wt.% C-wax PDMS uncover its potential as a sensor for water quality parameters such as temperature, pH, and heavy metal ion concentration. These findings open avenues for the integration of C-WaxDEGs into flexible electronic devices aimed at environmental monitoring.
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Affiliation(s)
- Guanbo Min
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wenjun Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Huifan Li
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China
- Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning, China
| | - Tingyu Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chengyu Li
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shuxing Xu
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Kun Xu
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China
- College of Mechanical and Electrical Engineering, Shandong Agricultural University, Tai'an, 271000, China
| | - Yurui Shang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China
- Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning, China
| | - Xin Zhao
- CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, China
| | - Gaurav Khandelwal
- James Watt School of Engineering, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Xufeng Jiao
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China
- Department of Orthopedic Surgery, China-Japan Friendship Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100005, China
| | - Wei Tang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 101400, China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
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2
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Steenbergen N, Busha I, Morgan A, Mattathil C, Levy Pinto A, Spyridakos F, Sokolovskiy I, Tahirbegi B, Chapman C, Cuttaz E, Litvinova K, Goding J, Green R. Surface electromyography using dry polymeric electrodes. APL Bioeng 2023; 7:036115. [PMID: 37705891 PMCID: PMC10497318 DOI: 10.1063/5.0148101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 08/22/2023] [Indexed: 09/15/2023] Open
Abstract
Conventional wet Ag/AgCl electrodes are widely used in electrocardiography, electromyography (EMG), and electroencephalography (EEG) and are considered the gold standard for biopotential measurements. However, these electrodes require substantial skin preparation, are single use, and cannot be used for continuous monitoring (>24 h). For these reasons, dry electrodes are preferable during surface electromyography (sEMG) due to their convenience, durability, and longevity. Dry conductive elastomers (CEs) combine conductivity, flexibility, and stretchability. In this study, CEs combining poly(3,4-ehtylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) in polyurethane are explored as dry, skin contacting EMG electrodes. This study compares these CE electrodes to commercial wet Ag/AgCl electrodes in five subjects, classifying four movements: open hand, fist, wrist extension, and wrist flexion. Classification accuracy is tested using a backpropagation artificial neural network. The control Ag/AgCl electrodes have a 98.7% classification accuracy, while the dry conductive elastomer electrodes have a classification accuracy of 99.5%. As a conclusion, PEDOT based dry CEs were shown to successfully function as on-skin electrodes for EMG recording, matching the performance of Ag/AgCl electrodes, while addressing the need for minimal skin prep, no gel, and wearable technology.
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Affiliation(s)
- Nicolas Steenbergen
- Department of Bioengineering, Imperial College London, London SW7 2BP, United Kingdom
| | - Ivan Busha
- Department of Bioengineering, Imperial College London, London SW7 2BP, United Kingdom
| | - Alexis Morgan
- Department of Bioengineering, Imperial College London, London SW7 2BP, United Kingdom
| | - Collin Mattathil
- Department of Bioengineering, Imperial College London, London SW7 2BP, United Kingdom
| | - Arieh Levy Pinto
- Department of Bioengineering, Imperial College London, London SW7 2BP, United Kingdom
| | - Fotios Spyridakos
- Department of Bioengineering, Imperial College London, London SW7 2BP, United Kingdom
| | - Ivan Sokolovskiy
- Department of Bioengineering, Imperial College London, London SW7 2BP, United Kingdom
| | - Bogachan Tahirbegi
- Department of Bioengineering, Imperial College London, London SW7 2BP, United Kingdom
| | - Christopher Chapman
- Department of Bioengineering, Imperial College London, London SW7 2BP, United Kingdom
| | - Estelle Cuttaz
- Department of Bioengineering, Imperial College London, London SW7 2BP, United Kingdom
| | - Karina Litvinova
- Department of Bioengineering, Imperial College London, London SW7 2BP, United Kingdom
| | - Josef Goding
- Department of Bioengineering, Imperial College London, London SW7 2BP, United Kingdom
| | - Rylie Green
- Department of Bioengineering, Imperial College London, London SW7 2BP, United Kingdom
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3
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Sun J, Zou X, Xu Z, Ge Z. Synthesis and characterization of low surface energy thermoplastic polyurethane elastomers based on polydimethylsiloxane. RSC Adv 2023; 13:12023-12034. [PMID: 37077257 PMCID: PMC10108671 DOI: 10.1039/d3ra01142a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 03/29/2023] [Indexed: 04/21/2023] Open
Abstract
Organosilicon modified polyurethane elastomers (Si-MTPUs) were synthesized in order to improve the anti-graffiti property of thermoplastic polyurethane elastomers (TPUs). Si-MTPUs were prepared from polydimethylsiloxane (PDMS) and polytetramethylene glycol (PTMG) as mixed soft segment, 1,4-butanediol (BDO) and imidazole salt ionic liquid N-glyceryl-N-methyl imidazolium chloride ([MIMl,g]Cl) used as chain extender, and 4,4'-dicyclohexylmethane diisocyanate (HMDI). The structure, thermal stability, mechanical properties and physical crosslinking density of Si-MTPUs were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetry analysis (TGA), mechanical test and low field nuclear magnetic resonance. Surface energy and water absorption were characterized by static contact angle test and water resistance test, and anti-graffiti and self-cleaning properties were characterized with water, milk, ink, lipstick, oily markers and spray paint. It was found that the mechanical properties of Si-MTPU-10 with the content of PDMS 10 wt% were optimized, with a maximum tensile strength of 32.3 MPa and elongation at break of 656%. Surface energy reached the minimum value of 23.1 mN m-1 with the best anti-graffiti performance, which no longer decreased with the increase of PDMS contents. This work provides novel idea and strategy for the preparation of low surface energy TPUs.
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Affiliation(s)
- Jie Sun
- School of Materials Science and Engineering, Beijing Institute of Technology Beijing 100081 China
| | - Xiaobin Zou
- School of Materials Science and Engineering, Beijing Institute of Technology Beijing 100081 China
| | - Zhiqian Xu
- School of Materials Science and Engineering, Beijing Institute of Technology Beijing 100081 China
| | - Zhen Ge
- School of Materials Science and Engineering, Beijing Institute of Technology Beijing 100081 China
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4
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Yun X, Lu H, Zhou Z, Yuan S, Wang Y, Dong T. Fabrication and design of poly(l-lactic acid) membrane for passive MAP packaging of Brassica chinensis L. J Food Sci 2023; 88:1640-1653. [PMID: 36916069 DOI: 10.1111/1750-3841.16529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 01/02/2023] [Accepted: 02/20/2023] [Indexed: 03/15/2023]
Abstract
PLDx L copolymers were synthesized from physically stable rigid poly(l-lactic acid) (PLLA) and a few different molecular weights of polydimethylsiloxane (PDMS) to increase the O2 and CO2 permeabilities of PLLA films and make them acceptable for packaging highly respirable products. The effect of PDMS on the morphology, mechanical properties, and gas permeability of PLDx L was investigated. Copolymers showed approximately 10 times the fracture strain and 1.7 times the CO2 and O2 permeabilities of neat PLLA. Additionally, PLDx L maintained an increased CO2 /O2 perm-selectivity consistent between 5 and 40°C. Passive modified atmosphere packaging of Brassica chinensis L was developed to assess the membrane's impact on headspace gas inside the package. The results showed that poly(amide)/poly(ethylene) packaging with 48 cm2 PLD1.8 L membrane as a breathing window can provide 50 g B. chinensis L. with a healthy atmosphere of 3%-8% O2 and 5%-8% CO2 between 6 and 22 days. Vegetables packaged in PLD1.8 L had the lower respiration rate, lower nitrite contents, and less proliferation of microorganisms. Moreover, a suitable atmosphere kept vegetables with higher ascorbic acid and a good appearance after more than 2 weeks of storage at 5°C. PRACTICAL APPLICATION: The permeability of the PLLA-based membrane can be adjusted for the breathable window membrane of sealed fresh products. In the future, several types of film could be developed to match the respiratory and metabolic characteristics of different kinds of products. Such PLLA-based specialized membranes can refine the fresh-keeping function and be more attractive to the customer.
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Affiliation(s)
- Xueyan Yun
- College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, China
| | - Hao Lu
- College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, China
| | - Ziyi Zhou
- College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, China
| | - Shuai Yuan
- College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, China
| | - Yangyang Wang
- College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, China
| | - Tungalag Dong
- College of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, China
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5
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Liu J, Yang D, Li S, Bai C, Tu C, Zhu F, Xin W, Li G, Luo Y. Synthesis and characterization of hydroxyl-terminated polybutadiene modified low temperature adaptive self-matting waterborne polyurethane. RSC Adv 2023; 13:7020-7029. [PMID: 36874934 PMCID: PMC9977405 DOI: 10.1039/d3ra00412k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 02/22/2023] [Indexed: 03/05/2023] Open
Abstract
Hydroxyl-terminated polybutadiene (HTPB) is a flexible telechelic compound with a main chain containing a slightly cross-linked activated carbon-carbon double bond and a hydroxyl group at the end. Therefore, in this paper, HTPB was used as a terminal diol prepolymer, and sulfonate AAS and carboxylic acid DMPA were used as hydrophilic chain extenders to prepare low-temperature adaptive self-matting waterborne polyurethane (WPU). Due to the fact that the non-polar butene chain in the HTPB prepolymer cannot form a hydrogen bond with the urethane group, and the solubility parameter difference between the hard segment formed by the urethane group is large, the gap of T g between the soft and hard segments of the WPU increases by nearly 10 °C, with more obvious microphase separation. At the same time, by adjusting the HTPB content, WPU emulsions with different particle sizes can be obtained, thereby obtaining WPU emulsions with good extinction properties and mechanical properties. The results show that HTPB-based WPU with a certain degree of microphase separation and roughness obtained by introducing a large number of non-polar carbon chains has good extinction ability, and the 60° glossiness can be as low as 0.4 GU. Meanwhile, the introduction of HTPB can improve the mechanical properties and low temperature flexibility of WPU. The T g,s (the glass transition temperature of soft segment) of WPU modified by the HTPB block decreased by 5.82 °C, and the ΔT g increased by 21.04 °C, indicating that the degree of microphase separation increased. At -50 °C, the elongation at break and tensile strength of WPU modified by HTPB can still maintain 785.2% and 76.7 MPa, which are 1.82 times and 2.91 times those of WPU with only PTMG as soft segment, respectively. The self-matting WPU coating prepared in this paper can meet the requirements of severe cold weather and has potential application prospects in the field of finishing.
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Affiliation(s)
| | | | | | | | | | | | - Wei Xin
- Beijing Institute of Technology China
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6
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Thermo-driven self-healable organic/inorganic nanohybrid polyurethane film with excellent mechanical properties. Polym J 2021. [DOI: 10.1038/s41428-021-00563-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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7
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T MS, Mondal T. Radiation curable polysiloxane: synthesis to applications. SOFT MATTER 2021; 17:6284-6297. [PMID: 34160540 DOI: 10.1039/d1sm00269d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Among the different types of specialty polymers, polysiloxane finds its position in the pyramid's apex in terms of its performance attributes. Its unique structural features result in it having superior performance benefits over wide operational conditions. Hence, polysiloxanes are used in various industries. Like other polymers, to effectively use polysiloxanes, curing is a non-negotiable fact. Therefore, polysiloxanes are cured using different chemistries such as addition, condensation, and peroxy-mediated methods, etc. However, recently, it has been noted that there is a strong impetus towards developing radiation-curable polysiloxanes. A faster turnover time, higher yield, and marginal involvement in the release of any toxic by-products has resulted in the widespread acceptance of radiation curing techniques. This review article provides insight into the various facets of polysiloxane chemistry, the synthesis of radiation curable polysiloxane, and the curing methodology of polysiloxane using radiation sources such as ultraviolet, electron beam, and gamma radiation. We further provide an account of the various applications of such radiation-curable polysiloxanes.
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Affiliation(s)
- Muthamil Selvan T
- Rubber Technology Centre, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India.
| | - Titash Mondal
- Rubber Technology Centre, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India.
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8
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Zhang W, Deng H, Xia L, Shen L, Zhang C, Lu Q, Sun S. Semi-interpenetrating polymer networks prepared from castor oil-based waterborne polyurethanes and carboxymethyl chitosan. Carbohydr Polym 2020; 256:117507. [PMID: 33483029 DOI: 10.1016/j.carbpol.2020.117507] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 12/04/2020] [Accepted: 12/09/2020] [Indexed: 02/08/2023]
Abstract
A series of vegetable oil-based waterborne polyurethane composites were prepared through construction of novel semi-interpenetrating polymers network using carboxymethyl chitosan (CA) as the secondary polymer phase. The effects of CA contents on storage stability, and particle size distribution of the composite dispersions and thermal stability, mechanical properties and surface wettability of composite films were investigated and discussed. The results showed that the composite dispersions displayed excellent storage stability and the biomass contents of resulting films were high up to 80 %. A significant increase in crosslinking density and glass transition temperature of the composite films were observed as the CA contents increased, which was attributed to the increasing hard segment of films and strong hydrogen bonding interaction between polyurethanes and CA. This work provided a simple method to tailor the performance of environmentally friendly vegetable oil-based waterborne polyurethane, which could find application in the field of coatings, adhesives, ink and so on.
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Affiliation(s)
- Wenbo Zhang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, 483 Wushan Road, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
| | - Henghui Deng
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, 483 Wushan Road, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
| | - Lijuan Xia
- National Risk Assessment Laboratory for Antimicrobial Resistance of Animal Original Bacteria, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Lan Shen
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, 483 Wushan Road, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
| | - Chaoqun Zhang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, 483 Wushan Road, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China.
| | - Qiming Lu
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, 483 Wushan Road, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China.
| | - Shaolong Sun
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, Guangdong, 510642, China.
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9
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Kim S, Ye SH, Adamo A, Orizondo RA, Jo J, Cho SK, Wagner WR. A biostable, anti-fouling zwitterionic polyurethane-urea based on PDMS for use in blood-contacting medical devices. J Mater Chem B 2020; 8:8305-8314. [PMID: 32785384 PMCID: PMC7530005 DOI: 10.1039/d0tb01220c] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Polydimethylsiloxane (PDMS) is commonly used in medical devices because it is non-toxic and stable against oxidative stress. Relatively high blood platelet adhesion and the need for chemical crosslinking through curing, however, limit its utility. In this research, a biostable PDMS-based polyurethane-urea bearing zwitterion sulfobetaine (PDMS-SB-UU) was synthesized for potential use in the fabrication or coating of blood-contacting devices, such as a conduits, artificial lungs, and microfluidic devices. The chemical structure and physical properties of synthesized PDMS-SB-UU were confirmed by 1H-nuclear magnetic resonance (1H-NMR), X-ray diffraction (XRD), and uniaxial stress-strain curve. In vitro stability of PDMS-SB-UU was confirmed against lipase and 30% H2O2 for 8 weeks, and PDMS-SB-UU demonstrated significantly higher resistance to fibrinogen adsorption and platelet deposition compared to control PDMS. Moreover, PDMS-SB-UU showed a lack of hemolysis and cytotoxicity with whole ovine blood and rat vascular smooth muscle cells (rSMCs), respectively. The PDMS-SB-UU was successfully processed into small-diameter (0.80 ± 0.05 mm) conduits by electrospinning and coated onto PDMS- and polypropylene-based blood-contacting biomaterials due to its unique physicochemical characteristics from its soft- and hard- segments.
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Affiliation(s)
- Seungil Kim
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA. and Departments of Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Sang-Ho Ye
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA. and Departments of Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Arianna Adamo
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA. and Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, University of Palermo, 90100 Palermo, Italy
| | - Ryan A Orizondo
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA. and Departments of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA and Department of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Jaehyuk Jo
- Department of Mechanical Engineering & Materials Science, University of Pittsburgh, Pittsburgh, PA, USA
| | - Sung Kwon Cho
- Department of Mechanical Engineering & Materials Science, University of Pittsburgh, Pittsburgh, PA, USA
| | - William R Wagner
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA. and Departments of Surgery, University of Pittsburgh, Pittsburgh, PA, USA and Departments of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA and Departments of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, PA, USA
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10
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Dai M, Wang J, Zhang Y. Improving water resistance of waterborne polyurethane coating with high transparency and good mechanical properties. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124994] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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11
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Compositions Based on PAN Solutions Containing Polydimethylsiloxane Additives: Morphology, Rheology, and Fiber Spinning. Polymers (Basel) 2020; 12:polym12040815. [PMID: 32260347 PMCID: PMC7240589 DOI: 10.3390/polym12040815] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 03/31/2020] [Accepted: 03/31/2020] [Indexed: 11/20/2022] Open
Abstract
The effect of additives of polydimethylsiloxanes (PDMS) with various molecular weights on the morphology and rheological behavior of polyacrylonitrile (PAN) solutions in dimethyl sulfoxide has been analyzed. It was shown that only partial compatibility of the PDMS with the lowest molecular weight member of the homologous series studied—hexamethyldisiloxane—with PAN solution takes place. All other PDMS samples form emulsions with PAN solutions. The coalescence rate of PDMS drops depends on the viscosity ratio of the disperse phase and the continuous medium, which determines both the duration of dispersion preparation and the conditions for processing emulsions into fibers and films. An anomalous change in viscosity for a series of emulsions with different concentrations of additives, associated with the slippage, was detected. The relaxation properties of emulsions “feel” macro-phase separation. Modeling of the wet spinning process has shown that the morphology of the deposited solution drop reflects the movement of the diffusion front, leading to the gathering droplets in the center of the deposited formulation drop or to their localization in a certain arrangement. It was shown that the emulsion jets upon stretching undergo phase separation.
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12
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Fan W, Jin Y, Shi L. Mechanically robust and tough waterborne polyurethane films based on diselenide bonds and dual H-bonding interactions with fast visible-light-triggered room-temperature self-healability. Polym Chem 2020. [DOI: 10.1039/d0py00897d] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A dynamic but mechanically robust and tough polymer network was proposed, in which the fast room-temperature self-healing of our target polymer with mechanically robust and tough features is achieved under visible light.
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Affiliation(s)
- Wuhou Fan
- National Engineering Laboratory for Clean Technology of Leather Manufacture
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education
- Sichuan University
- Chengdu 610065
- China
| | - Yong Jin
- National Engineering Laboratory for Clean Technology of Leather Manufacture
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education
- Sichuan University
- Chengdu 610065
- China
| | - Liangjie Shi
- National Engineering Laboratory for Clean Technology of Leather Manufacture
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education
- Sichuan University
- Chengdu 610065
- China
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13
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Polydimethylsiloxane/monomer casting nylon copolymers: Preparation, flame‐retardant properties, and wear‐resistant properties. J Appl Polym Sci 2019. [DOI: 10.1002/app.48753] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Kermaninejad H, Najafi F, Soleimani‐Gorgani A. Encapsulation of flexible organic light emitting diodes by UV‐cure epoxy siloxane. J Appl Polym Sci 2019. [DOI: 10.1002/app.48033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hamidreza Kermaninejad
- Department of Resins and AdditivesInstitute for color science and technology Tehran Iran 1668836471
| | - Farhood Najafi
- Department of Resins and AdditivesInstitute for color science and technology Tehran Iran 1668836471
| | - Atasheh Soleimani‐Gorgani
- Department of Printing Science and TechnologyInstitute for Color Science and Technology Tehran Iran 1668836471
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15
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Sun X, Chen R, Gao X, Liu Q, Liu J, Zhang H, Yu J, Liu P, Takahashi K, Wang J. Fabrication of epoxy modified polysiloxane with enhanced mechanical properties for marine antifouling application. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.05.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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16
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Xu C, OuYang L, Cai Z, Ren Y, Lu S, Shi W. Effects of polyaminosiloxane on the structure and properties of modified waterborne polyurethane. J Appl Polym Sci 2019. [DOI: 10.1002/app.47226] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chengshu Xu
- College of Textiles and Materials; Xi'an Polytechnic University; Xi'an China
| | - Lei OuYang
- Xi'an Wanzi Fine Chemical Technology Company, Limited; Xi'an China
| | - Zaisheng Cai
- College of Chemistry, Chemical Engineering and Biotechnology; Donghua University; Shanghai China
| | - Yan Ren
- College of Textiles and Materials; Xi'an Polytechnic University; Xi'an China
| | - Shaofeng Lu
- College of Textiles and Materials; Xi'an Polytechnic University; Xi'an China
| | - Wenzhao Shi
- College of Textiles and Materials; Xi'an Polytechnic University; Xi'an China
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Luo S, Yang K, Zhong Z, Wu X, Ren T. Facile preparation of degradable multi-arm-star-branched waterborne polyurethane with bio-based tannic acid. RSC Adv 2018; 8:37765-37773. [PMID: 35558615 PMCID: PMC9089409 DOI: 10.1039/c8ra07875k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 11/03/2018] [Indexed: 12/14/2022] Open
Abstract
In this research, biodegradable multi-arm-star-branched waterborne polyurethanes (MWPUs) were prepared by incorporation of bio-based material (tannic acid, TA) in the structure of waterborne polyurethanes. The prepared MWPUs were characterized by UV-vis spectrometry and FT-IR spectrometry, confirming the presence of TA in MWPUs. The results of DSC and TGA demonstrated that the incorporation of TA remarkably enhanced the thermal stability of MWPUs. The mechanical strength test indicated that the Young's modulus and tensile strength of the waterborne polyurethanes after incorporation of TA were significantly improved due to the increase of structural rigidity, hydrogen bonding and the molecular interactions of the TA-based MWPU chains. In addition, the synthesized TA-based MWPUs also exhibited excellent antioxidation capacity and outstanding biodegradation property. Given these excellent properties and the sustainability of TA, the developed TA-based MWPUs exhibited great potential in a wide range of practical applications.
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Affiliation(s)
- Shun Luo
- Institute of Nano and Biopolymeric Materials, School of Materials Science and Engineering, Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, Tongji University 4800 Caoan Road Shanghai 201804 China +86-21-33515906 +86-21-33515906
| | - Kai Yang
- Institute of Nano and Biopolymeric Materials, School of Materials Science and Engineering, Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, Tongji University 4800 Caoan Road Shanghai 201804 China +86-21-33515906 +86-21-33515906
| | - Zhen Zhong
- Institute of Nano and Biopolymeric Materials, School of Materials Science and Engineering, Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, Tongji University 4800 Caoan Road Shanghai 201804 China +86-21-33515906 +86-21-33515906
| | - Xiaojian Wu
- Institute of Nano and Biopolymeric Materials, School of Materials Science and Engineering, Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, Tongji University 4800 Caoan Road Shanghai 201804 China +86-21-33515906 +86-21-33515906
| | - Tianbin Ren
- Institute of Nano and Biopolymeric Materials, School of Materials Science and Engineering, Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, Tongji University 4800 Caoan Road Shanghai 201804 China +86-21-33515906 +86-21-33515906
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