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Lu YH, Wang YZ, Tsai MY, Lin HP, Hsu CH. Electrospun Benzimidazole-Based Polyimide Membrane for Supercapacitor Applications. Membranes (Basel) 2022; 12:membranes12100961. [PMID: 36295721 PMCID: PMC9607089 DOI: 10.3390/membranes12100961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 09/18/2022] [Accepted: 09/26/2022] [Indexed: 05/14/2023]
Abstract
A benzimidazole-containing diamine monomer was prepared via a simple one-step synthesis process. A two-step procedure involving polycondensation in the presence of aromatic dianhydrides (4,4'-oxydiphthalic anhydride, ODPA) followed by thermal imidization was then performed to prepare a benzimidazole-based polyimide (BI-PI). BI-PI membranes were fabricated using an electrospinning technique and were hot pressed for 30 min at 200 °C under a pressure of 50 kgf /cm2. Finally, the hot-pressed membranes were assembled into supercapacitors, utilizing high-porosity-activated water chestnut shell biochar as the active material. The TGA results showed that the BI-PI polymer produced in the two-step synthesis process had a high thermal stability (Td5% = 527 °C). Moreover, the hot-press process reduced the pore size in the BI-PI membrane and improved the pore-size uniformity. The hot-press procedure additionally improved the mechanical properties of the BI-PI membrane, resulting in a high tensile modulus of 783 MPa and a tensile strength of 34.8 MPa. The cyclic voltammetry test results showed that the membrane had a specific capacitance of 121 F/g and a capacitance retention of 77%. By contrast, a commercial cellulose separator showed a specific capacitance value of 107 F/g and a capacitance retention of 49% under the same scanning conditions. Finally, the membrane showed both a small equivalent series resistance (Rs) and a small interfacial resistance (Rct). Overall, the results showed that the BI-PI membrane has significant potential as a separator for high-performance supercapacitor applications.
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Affiliation(s)
- Yu-Hsiang Lu
- Department of Chemical and Materials Engineering, National Yunlin University of Science and Technology, No. 123, Sec. 3, University Road, Douliou 64002, Taiwan
| | - Yen-Zen Wang
- Department of Chemical and Materials Engineering, National Yunlin University of Science and Technology, No. 123, Sec. 3, University Road, Douliou 64002, Taiwan
- Correspondence: (Y.-Z.W.); (C.-H.H.)
| | - Ming-Ying Tsai
- Department of Chemistry, National Cheng Kung University, No. 1 University Road, Tainan City 70101, Taiwan
| | - Hong-Ping Lin
- Department of Chemistry, National Cheng Kung University, No. 1 University Road, Tainan City 70101, Taiwan
| | - Chun-Han Hsu
- General Education Center, National Tainan Junior College of Nursing, No. 78, Sec. 2, Minzu Road, Tainan City 700, Taiwan
- Correspondence: (Y.-Z.W.); (C.-H.H.)
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2
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Hodge JG, Quint C. Improved porosity of electrospun poly (Lactic-Co-Glycolic) scaffolds by sacrificial microparticles enhances cellular infiltration compared to sacrificial microfiber. J Biomater Appl 2022; 37:77-88. [PMID: 35317691 DOI: 10.1177/08853282221075890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Electrospinning is a technique used to fabricate nano-/microfiber scaffolds for tissue engineering applications. However, a major limitation of electrospun scaffolds is the high packing density of fibers that leads to poor cellular infiltration. Thus, incorporation of a water soluble sacrificial porogen, polyethylene oxide (PEO), was utilized to fine-tune the porous fraction of the scaffolds and decrease fiber packing density. Poly(lactic-co-glycolic) acid (PLGA) scaffolds were either co-electrospun with sacrificial PEO microfibers or co-electrosprayed with sacrificial PEO microparticles at three different extrusion rates to control the relative morphology and dose of PEO. A dose-dependent response in PLGA scaffold bulk porosity and pore area was noted as PEO content was increased. Notably, PLGA scaffolds after removal of sacrificial PEO microparticles significantly increased the porous fraction and pore area approximately 8, 10, and 14% and 46, 20, and 33 μm2, respectively, relative to the analogous PEO microfiber scaffold. The tensile properties of the more porous PLGA scaffolds after PEO microparticle removal, remained stable for all extrusion rates of PEO tested, relative to the PLGA scaffolds after PEO microfiber removal. Histological analysis revealed that removal of PEO microparticles significantly increased the depth of cellular migration through the PLGA scaffolds, relative to PEO microfiber scaffolds, with maximum migratory depths of 1120 μm versus 150 μm over 28 days, respectively. Additionally, depth of cellular infiltration responded dose-dependently in the PEO microparticle scaffolds, whereas in the PEO microfiber scaffolds there was no correlation. Further analysis with Masson's Trichrome staining and electron microscopy revealed that collagen density and depth of deposition substantially increased in PLGA scaffolds after removal of PEO microparticles relative to PEO microfibers. Thus, this study demonstrates an effective strategy to control the porous fraction of electrospun scaffolds via the incorporation of sacrificial PEO microparticles, without significant decreases in mechanical properties, thereby enhancing cellular infiltration and subsequent extracellular matrix deposition.
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Affiliation(s)
- Jacob G Hodge
- Department of Bioengineering, 199644University of Kansas School of Engineering, Lawrence, KS, USA
| | - Clay Quint
- Department of Surgery, 20118South Texas Veterans Health Care System, San Antonio, TX, USA
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3
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Wang Y, Zhou G, Yan Y, Shao B, Hou J. Construction of Natural Loofah/Poly(vinylidene fluoride) Core-Shell Electrospun Nanofibers via a Controllable Janus Nozzle for Switchable Oil-Water Separation. ACS Appl Mater Interfaces 2020; 12:51917-51926. [PMID: 33147949 DOI: 10.1021/acsami.0c12912] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Developing microstructure and multifunctional membranes toward switchable oil-water separation has been highly desired in oily wastewater treatment. Herein, a controllable Janus nozzle was employed to innovatively electrospin natural loofah/poly(vinylidene fluoride) (PVDF) nanofibers with a core-shell structure for gravity-driven water purification. By adjusting flow rates of the PVDF component, a core-shell structure of the composite fibers was obtained caused by the lower viscosity and surface tension of PVDF. In addition, a steady laminar motion of fluids was constructed based on the Reynolds number of flow fields being less than 2300. In order to investigate the formation mechanism of the microstructure, a series of Janus nozzles with different lengths were controlled to study the blending of the two immiscible components. The gravity difference between the two components might cause disturbance of the jet motion, and the PVDF component unidirectionally encapsulated the loofah to form the shell layer. Most importantly, the dry loofah/PVDF membranes could separate oil from an oil-water mixture, while the water-wetted membrane exhibited switchable separation that could separate water from the mixtures because of the hydroxyl groups of the hydrophilic loofah hydrogen-bonding with water molecules and forming a hydration layer. The composite fibers can be applied in water remediation in practice, and the method to produce core-shell structures seems attractive for technological applications involving macroscopic core-shell nano- or microfibers.
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Affiliation(s)
- Yihuan Wang
- Key laboratory of Automobile Materials of Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130025, China
| | - Guibin Zhou
- Key laboratory of Automobile Materials of Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130025, China
| | - Yifan Yan
- Key laboratory of Automobile Materials of Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130025, China
| | - Bohui Shao
- Key laboratory of Automobile Materials of Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130025, China
| | - Jiazi Hou
- Key laboratory of Automobile Materials of Ministry of Education, College of Materials Science and Engineering, Jilin University, Changchun 130025, China
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4
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Aydemir Sezer U, Ozturk Yavuz K, Ors G, Bay S, Aru B, Sogut O, Akgul Caglar T, Bozkurt MR, Cagavi E, Yanikkaya Demirel G, Sezer S, Karaca H. Zero-valent iron nanoparticles containing nanofiber scaffolds for nerve tissue engineering. J Tissue Eng Regen Med 2020; 14:1815-1826. [PMID: 33010108 DOI: 10.1002/term.3137] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 08/25/2020] [Accepted: 09/10/2020] [Indexed: 12/11/2022]
Abstract
Regeneration of nerve tissue is a challenging issue in regenerative medicine. Especially, the peripheral nerve defects related to the accidents are one of the leading health problems. For large degeneration of peripheral nerve, nerve grafts are used in order to obtain a connection. These grafts should be biodegradable to prevent second surgical intervention. In order to make more effective nerve tissue engineering materials, nanotechnological improvements were used. Especially, the addition of electrically conductive and biocompatible metallic particles and carbon structures has essential roles in the stimulation of nerves. However, the metabolizing of these structures remains to wonder because of their nondegradable nature. In this study, biodegradable and conductive nerve tissue engineering materials containing zero-valent iron (Fe) nanoparticles were developed and investigated under in vitro conditions. By using electrospinning technique, fibrous mats composed of electrospun poly(ε-caprolactone) (PCL) nanofibers and Fe nanoparticles were obtained. Both electrical conductivity and mechanical properties increased compared with control group that does not contain nanoparticles. Conductivity of PCL/Fe5 and PCL/Fe10 increased to 0.0041 and 0.0152 from 0.0013 Scm-1 , respectively. Cytotoxicity results indicated toxicity for composite mat containing 20% Fe nanoparticles (PCL/Fe20). SH-SY5Y cells were grown on PCL/Fe10 best, which contains 10% Fe nanoparticles. Beta III tubulin staining of dorsal root ganglion neurons seeded on mats revealed higher cell number on PCL/Fe10. This study demonstrated the impact of zero-valent Fe nanoparticles on nerve regeneration. The results showed the efficacy of the conductive nanoparticles, and the amount in the composition has essential roles in the promotion of the neurites.
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Affiliation(s)
- Umran Aydemir Sezer
- Faculty of Medicine, Department of Pharmacology, Medicine, Medical Devices and Dermocosmetic Research and Application Laboratory (IDAL), Suleyman Demirel University, Isparta, Turkey.,Department of Regenerative Medicine, Institute of Health Sciences, Isparta, Turkey.,Semical Technology Industry and Trade Co. Ltd., Suleyman Demirel University, Lake District Technopark, Isparta, Turkey
| | | | - Gizem Ors
- Department of Medical Biology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey.,Regenerative and Restorative Medicine Research Center (REMER), Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, Turkey
| | - Sadık Bay
- Neuroscience PhD Programme, Institute of Health, Istanbul Medipol University, Istanbul, Turkey.,Regenerative and Restorative Medicine Research Center (REMER), Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, Turkey
| | - Basak Aru
- Faculty of Medicine, Immunology Department, Yeditepe University, Istanbul, Turkey
| | - Oguz Sogut
- Faculty of Medicine, Department of Pharmacology, Medicine, Medical Devices and Dermocosmetic Research and Application Laboratory (IDAL), Suleyman Demirel University, Isparta, Turkey
| | - Tuba Akgul Caglar
- Neuroscience PhD Programme, Institute of Health, Istanbul Medipol University, Istanbul, Turkey.,Regenerative and Restorative Medicine Research Center (REMER), Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, Turkey
| | - Mehmet Recep Bozkurt
- Department of Electrical and Electronics Engineering, Sakarya University, Sakarya, Turkey
| | - Esra Cagavi
- Department of Medical Biology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey.,Regenerative and Restorative Medicine Research Center (REMER), Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, Turkey
| | | | - Serdar Sezer
- Faculty of Medicine, Department of Pharmacology, Medicine, Medical Devices and Dermocosmetic Research and Application Laboratory (IDAL), Suleyman Demirel University, Isparta, Turkey.,Department of Regenerative Medicine, Institute of Health Sciences, Isparta, Turkey.,Semical Technology Industry and Trade Co. Ltd., Suleyman Demirel University, Lake District Technopark, Isparta, Turkey
| | - Huseyin Karaca
- Department of Chemistry, Sakarya University, Sakarya, Turkey
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5
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Goodge K, Frey M. Biotin-Conjugated Cellulose Nanofibers Prepared via Copper-Catalyzed Alkyne-Azide Cycloaddition (CuAAC) "Click" Chemistry. Nanomaterials (Basel) 2020; 10:E1172. [PMID: 32560117 PMCID: PMC7353318 DOI: 10.3390/nano10061172] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 06/10/2020] [Accepted: 06/13/2020] [Indexed: 02/02/2023]
Abstract
As potential high surface area for selective capture in diagnostic or filtration devices, biotin-cellulose nanofiber membranes were fabricated to demonstrate the potential for specific and bio-orthogonal attachment of biomolecules onto nanofiber surfaces. Cellulose acetate was electrospun and substituted with alkyne groups in either a one- or two-step process. The alkyne reaction, confirmed by FTIR and Raman spectroscopy, was dependent on solvent ratio, time, and temperature. The two-step process maximized alkyne substitution in 10/90 volume per volume ratio (v/v) water to isopropanol at 50 °C after 6 h compared to the one-step process in 80/20 (v/v) at 50 °C after 48 h. Azide-biotin conjugate "clicked" with the alkyne-cellulose via copper-catalyzed alkyne-azide cycloaddition (CuAAC). The biotin-cellulose membranes, characterized by FTIR, SEM, Energy Dispersive X-ray spectroscopy (EDX), and XPS, were used in proof-of-concept assays (HABA (4'-hydroxyazobenzene-2-carboxylic acid) colorimetric assay and fluorescently tagged streptavidin assay) where streptavidin selectively bound to the pendant biotin. The click reaction was specific to alkyne-azide coupling and dependent on pH, ratio of ascorbic acid to copper sulfate, and time. Copper (II) reduction to copper (I) was successful without ascorbic acid, increasing the viability of the click conjugation with biomolecules. The surface-available biotin was dependent on storage medium and time: Decreasing with immersion in water and increasing with storage in air.
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Affiliation(s)
| | - Margaret Frey
- Department of Fiber Science and Apparel Design, Cornell University, Ithaca, NY 14853, USA;
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6
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Li N, Xue F, Zhang H, Sanyour HJ, Rickel AP, Uttecht A, Fanta B, Hu J, Hong Z. Fabrication and Characterization of Pectin Hydrogel Nanofiber Scaffolds for Differentiation of Mesenchymal Stem Cells into Vascular Cells. ACS Biomater Sci Eng 2019; 5:6511-6519. [PMID: 33417803 DOI: 10.1021/acsbiomaterials.9b01178] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Despite significant progress over the past few decades, creating a tissue-engineered vascular graft with replicated functions of native blood vessels remains a challenge due to the mismatch in mechanical properties, low biological function, and rapid occlusion caused by restenosis of small diameter vessel grafts (<6 mm diameter). A scaffold with similar mechanical properties and biocompatibility to the host tissue is ideally needed for the attachment and proliferation of cells to support the building of engineered tissue. In this study, pectin hydrogel nanofiber scaffolds with two different oxidation degrees (25 and 50%) were prepared by a multistep methodology including periodate oxidation, electrospinning, and adipic acid dihydrazide crosslinking. Scanning electron microscopy (SEM) images showed that the obtained pectin nanofiber mats have a nano-sized fibrous structure with 300-400 nm fiber diameter. Physicochemical property testing using Fourier transform infrared (FTIR) spectra, atomic force microscopy (AFM) nanoindentations, and contact angle measurements demonstrated that the stiffness and hydrophobicity of the fiber mat could be manipulated by adjusting the oxidation and crosslinking levels of the pectin hydrogels. Live/Dead staining showed high viability of the mesenchymal stem cells (MSCs) cultured on the pectin hydrogel fiber scaffold for 14 days. In addition, the potential application of pectin hydrogel nanofiber scaffolds of different stiffness in stem cell differentiation into vascular cells was assessed by gene expression analysis. Real-time polymerase chain reaction (RT-PCR) results showed that the stiffer scaffold facilitated the differentiation of MSCs into vascular smooth muscle cells, while the softer fiber mat promoted MSC differentiation into endothelial cells. Altogether, our results indicate that the pectin hydrogel nanofibers have the capability of providing mechanical cues that induce MSC differentiation into vascular cells and can be potentially applied in stem cell-based tissue engineering.
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Affiliation(s)
- Na Li
- Department of Biomedical Engineering, University of South Dakota, Sioux Falls, South Dakota 57107, United States
| | - Fuxin Xue
- Key Laboratory of UV-Emitting Materials and Technology (Northeast Normal University), Ministry of Education, Changchun, Jilin 130024, P. R. China
| | - Hui Zhang
- Key Laboratory of UV-Emitting Materials and Technology (Northeast Normal University), Ministry of Education, Changchun, Jilin 130024, P. R. China
| | - Hanna J Sanyour
- Department of Biomedical Engineering, University of South Dakota, Sioux Falls, South Dakota 57107, United States
| | - Alex P Rickel
- Department of Biomedical Engineering, University of South Dakota, Sioux Falls, South Dakota 57107, United States
| | - Andrew Uttecht
- Department of Biomedical Engineering, University of South Dakota, Sioux Falls, South Dakota 57107, United States
| | - Betty Fanta
- Department of Biomedical Engineering, University of South Dakota, Sioux Falls, South Dakota 57107, United States
- BioSNTR, Sioux Falls, South Dakota 57107, United States
| | - Junli Hu
- Key Laboratory of UV-Emitting Materials and Technology (Northeast Normal University), Ministry of Education, Changchun, Jilin 130024, P. R. China
| | - Zhongkui Hong
- Department of Biomedical Engineering, University of South Dakota, Sioux Falls, South Dakota 57107, United States
- BioSNTR, Sioux Falls, South Dakota 57107, United States
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7
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Boda SK, Chen S, Chu K, Kim HJ, Xie J. Electrospraying Electrospun Nanofiber Segments into Injectable Microspheres for Potential Cell Delivery. ACS Appl Mater Interfaces 2018; 10:25069-25079. [PMID: 29993232 PMCID: PMC6689401 DOI: 10.1021/acsami.8b06386] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [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] [Indexed: 05/17/2023]
Abstract
Nanofiber microspheres have attracted a lot of attention for biomedical applications because of their injectable and biomimetic properties. Herein, we report for the first time a new method for fabrication of nanofiber microspheres by combining electrospinning and electrospraying and explore their potential applications for cell therapy. Electrospraying of aqueous dispersions of electrospun nanofiber segments with desired length obtained by either cryocutting or homogenization into liquid nitrogen followed by freeze-drying and thermal treatment can form nanofiber microspheres. The microsphere size can be controlled by varying the applied voltage during the electrospray process. A variety of morphologies were achieved including solid, nanofiber, porous and nanofiber microspheres, and hollow nanofiber microspheres. Furthermore, a broad range of polymer and inorganic bioactive glass nanofiber-based nanofiber microspheres could be fabricated by electrospraying of their short nanofiber dispersions, indicating a comprehensive applicability of this method. A higher cell carrier efficiency of nanofiber microspheres as compared to solid microspheres was demonstrated with rat bone marrow-derived mesenchymal stem cells, along with the formation of microtissue-like structures in situ, when injected into microchannel devices. Also, mouse embryonic stem cells underwent neural differentiation on the nanofiber microspheres, indicated by positive staining of β-III-tubulin and neurite outgrowth. Taken together, we developed a new method for generating nanofiber microspheres that are injectable and have improved viability and maintenance of stem cells for potential application in cell therapy.
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Affiliation(s)
- Sunil Kumar Boda
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, College of Medicine
| | - Shixuan Chen
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, College of Medicine
| | - Kathy Chu
- Department of Psychiatry and Mary & Dick Holland Regenerative Medicine Program, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Hyung Joon Kim
- Department of Psychiatry and Mary & Dick Holland Regenerative Medicine Program, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Jingwei Xie
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, College of Medicine
- Corresponding Author.
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Kim M, Wu YS, Kan EC, Fan J. Breathable and Flexible Piezoelectric ZnO@PVDF Fibrous Nanogenerator for Wearable Applications. Polymers (Basel) 2018; 10:E745. [PMID: 30960670 PMCID: PMC6403693 DOI: 10.3390/polym10070745] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 06/22/2018] [Indexed: 11/17/2022] Open
Abstract
A novel breathable piezoelectric membrane has been developed by growing zinc oxide (ZnO) nanorods on the surface of electrospun poly(vinylidene fluoride) (PVDF) nanofibers using a low-temperature hydrothermal method. Significant improvement in the piezoelectric response of the PVDF membrane was achieved without compromising breathability and flexibility. PVDF is one of the most frequently used piezoelectric polymers due to its high durability and reasonable piezoelectric coefficient values. However, further enhancement of its piezoelectric response is highly desirable for sensor and energy-harvester applications. Previous studies have demonstrated that piezoelectric ceramic and polymer composites can have remarkable piezoelectric properties and flexibility. However, devices made of such composites lack breathability and some present health risks in wearable applications for containing heavy metals. Unlike other piezoelectric ceramics, ZnO is non-toxic material and has been widely used in many applications including cosmetics. The fabrication of ZnO@PVDF porous electrospun membrane involves a simple low-temperature ZnO growth in aqueous solution, which does not weaken the polarization of PVDF created during electrospinning in the high electric field.
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Affiliation(s)
- Minji Kim
- Department of Fiber Science and Apparel Design, Cornell University, Ithaca, NY 14853, USA.
| | - Yuen Shing Wu
- Department of Fiber Science and Apparel Design, Cornell University, Ithaca, NY 14853, USA.
| | - Edwin C Kan
- School of Electrical and Computer Engineering, Cornell University, Ithaca, NY 14853, USA.
| | - Jintu Fan
- Department of Fiber Science and Apparel Design, Cornell University, Ithaca, NY 14853, USA.
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Dang A, De Leo S, Bogdanowicz DR, Yuan DJ, Fernandes SM, Brown JR, Lu HH, Kam LC. Enhanced activation and expansion of T cells using mechanically soft elastomer fibers. ACTA ACUST UNITED AC 2018; 2. [PMID: 31008184 DOI: 10.1002/adbi.201700167] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Practical deployment of cellular therapies requires effective platforms for producing clinically relevant numbers of high-quality cells. This report introduces a materials-based approach to improving activation and expansion of T cells, which are rapidly emerging as an agent for treating cancer and a range of other diseases. Electrospinning is used to create a mesh of poly(ε-caprolactone) fibers, which is used to present activating ligands to CD3 and CD28, which activate T cells for expansion. Incorporation of poly(dimethyl siloxane) elastomer into the fibers reduces substrate rigidity and enhances expansion of mixed populations of human CD4+ and CD8+ T cells. Intriguingly, this platform also rescues expansion of T cells isolated from CLL patients, which often show limited responsiveness and other features resembling exhaustion. By simplifying the process of cell expansion, compared to current bead-based platforms, and improving T cell expansion, the system introduced here may accelerate development of cellular immunotherapy.
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Affiliation(s)
- Alex Dang
- Department of Biomedical Engineering, Columbia University, New York, NY 10027, USA
| | - Sarah De Leo
- Department of Biomedical Engineering, Columbia University, New York, NY 10027, USA
| | | | - Dennis J Yuan
- Department of Biomedical Engineering, Columbia University, New York, NY 10027, USA
| | - Stacey M Fernandes
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA
| | - Jennifer R Brown
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA
| | - Helen H Lu
- Department of Biomedical Engineering, Columbia University, New York, NY 10027, USA
| | - Lance C Kam
- Department of Biomedical Engineering, Columbia University, New York, NY 10027, USA,
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10
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Chen Z, Zeng J, Lv D, Gao J, Zhang J, Bai S, Li R, Hong M, Wu J. Halloysite nanotube-based electrospun ceramic nanofibre mat: a novel support for zeolite membranes. R Soc Open Sci 2016; 3:160552. [PMID: 28083098 PMCID: PMC5210680 DOI: 10.1098/rsos.160552] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 11/17/2016] [Indexed: 06/06/2023]
Abstract
Some key parameters of supports such as porosity, pore shape and size are of great importance for fabrication and performance of zeolite membranes. In this study, we fabricated millimetre-thick, self-standing electrospun ceramic nanofibre mats and employed them as a novel support for zeolite membranes. The nanofibre mats were prepared by electrospinning a halloysite nanotubes/polyvinyl pyrrolidone composite followed by a programmed sintering process. The interwoven nanofibre mats possess up to 80% porosity, narrow pore size distribution, low pore tortuosity and highly interconnected pore structure. Compared with the commercial α-Al2O3 supports prepared by powder compaction and sintering, the halloysite nanotube-based mats (HNMs) show higher flux, better adsorption of zeolite seeds, adhesion of zeolite membranes and lower Al leaching. Four types of zeolite membranes supported on HNMs have been successfully synthesized with either in situ crystallization or a secondary growth method, demonstrating good universality of HNMs for supporting zeolite membranes.
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Affiliation(s)
- Zhuwen Chen
- Guangdong Provincial Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Jiaying Zeng
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, People's Republic of China
| | - Dong Lv
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, People's Republic of China
| | - Jinqiang Gao
- Guangdong Provincial Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Jian Zhang
- Guangdong Provincial Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Shan Bai
- Guangdong Provincial Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Ruili Li
- Shenzhen Engineering Laboratory for Water Desalinization with Renewable Energy, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Mei Hong
- Guangdong Provincial Key Laboratory of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Jingshen Wu
- Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, People's Republic of China
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11
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Kolewe KW, Dobosz KM, Rieger KA, Chang CC, Emrick T, Schiffman JD. Antifouling Electrospun Nanofiber Mats Functionalized with Polymer Zwitterions. ACS Appl Mater Interfaces 2016; 8:27585-27593. [PMID: 27669057 PMCID: PMC5382136 DOI: 10.1021/acsami.6b09839] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this study, we exploit the excellent fouling resistance of polymer zwitterions and present electrospun nanofiber mats surface functionalized with poly(2-methacryloyloxyethyl phosphorylcholine) (polyMPC). This zwitterionic polymer coating maximizes the accessibility of the zwitterion to effectively limit biofouling on nanofiber membranes. Two facile, scalable methods yielded a coating on cellulose nanofibers: (i) a two-step sequential deposition featuring dopamine polymerization followed by the physioadsorption of polyMPC, and (ii) a one-step codeposition of polydopamine (PDA) with polyMPC. While the sequential and codeposited nanofiber mat assemblies have an equivalent average fiber diameter, hydrophilic contact angle, surface chemistry, and stability, the topography of nanofibers prepared by codeposition were smoother. Protein and microbial antifouling performance of the zwitterion modified nanofiber mats along with two controls, cellulose (unmodified) and PDA coated nanofiber mats were evaluated by dynamic protein fouling and prolonged bacterial exposure. Following 21 days of exposure to bovine serum albumin, the sequential nanofiber mats significantly resisted protein fouling, as indicated by their 95% flux recovery ratio in a water flux experiment, a 300% improvement over the cellulose nanofiber mats. When challenged with two model microbes Escherichia coli and Staphylococcus aureus for 24 h, both zwitterion modifications demonstrated superior fouling resistance by statistically reducing microbial attachment over the two controls. This study demonstrates that, by decorating the surfaces of chemically and mechanically robust cellulose nanofiber mats with polyMPC, we can generate high performance, free-standing nanofiber mats that hold potential in applications where antifouling materials are imperative, such as tissue engineering scaffolds and water purification technologies.
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Affiliation(s)
- Kristopher W. Kolewe
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003-9303
| | - Kerianne M. Dobosz
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003-9303
| | - Katrina A. Rieger
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003-9303
| | - Chia-Chih Chang
- Department of Polymer Science and Engineering, University of Massachusetts Amherst, Massachusetts 01003-9303
| | - Todd Emrick
- Department of Polymer Science and Engineering, University of Massachusetts Amherst, Massachusetts 01003-9303
| | - Jessica D. Schiffman
- Department of Chemical Engineering, University of Massachusetts Amherst, Amherst, Massachusetts 01003-9303
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12
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Abstract
Nanofibers are extremely advantageous for drug delivery because of their high surface area-to-volume ratios, high porosities and 3D open porous structures. Local delivery of analgesics by using nanofibers allows site-specificity and requires a lower overall drug dosage with lower adverse side effects. Different analgesics have been loaded onto various nanofibers, including those that are natural, synthetic and copolymer, for various medical applications. Analgesics can also be singly or coaxially loaded onto nanofibers to enhance clinical applications. In particular, analgesic-eluting nanofibers provide additional benefits to preventing wound adhesion and scar formation. This paper reviews current research and breakthrough discoveries on the innovative application of analgesic-loaded nanofibers that will alter the clinical therapy of pain.
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Affiliation(s)
- Yuan-Yun Tseng
- Department of Neurosurgery, Shuang Ho Hospital, Taipei Medical University, Taipei, Taiwan
| | - Shih-Jung Liu
- Biomaterials Lab, Department of Mechanical Engineering, Chang Gung University, Tao-Yuan, Taiwan
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Rieger KA, Cho HJ, Yeung HF, Fan W, Schiffman JD. Antimicrobial Activity of Silver Ions Released from Zeolites Immobilized on Cellulose Nanofiber Mats. ACS Appl Mater Interfaces 2016; 8:3032-40. [PMID: 26788882 DOI: 10.1021/acsami.5b10130] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
In this study, we exploit the high silver ion exchange capability of Linde Type A (LTA) zeolites and present, for the first time, electrospun nanofiber mats decorated with in-house synthesized silver (Ag(+)) ion exchanged zeolites that function as molecular delivery vehicles. LTA-Large zeolites with a particle size of 6.0 μm were grown on the surface of the cellulose nanofiber mats, whereas LTA-Small zeolites (0.2 μm) and three-dimensionally ordered mesoporous-imprinted (LTA-Meso) zeolites (0.5 μm) were attached to the surface of the cellulose nanofiber mats postsynthesis. After the three zeolite/nanofiber mat assemblies were ion-exchanged with Ag(+) ions, their ion release profiles and ability to inactivate Escherichia coli (E. coli) K12 were evaluated as a function of time. LTA-Large zeolites immobilized on the nanofiber mats displayed more than an 11 times greater E. coli K12 inactivation than the Ag-LTA-Large zeolites that were not immobilized on the nanofiber mats. This study demonstrates that by decorating nanometer to micrometer scale Ag(+) ion-exchanged zeolites on the surface of high porosity, hydrophilic cellulose nanofiber mats, we can achieve a tunable release of Ag(+) ions that inactivate bacteria faster and are more practical to use in applications over powder zeolites.
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Affiliation(s)
- Katrina A Rieger
- Department of Chemical Engineering, University of Massachusetts Amherst , Amherst, Massachusetts 01003-9303, United States
| | - Hong Je Cho
- Department of Chemical Engineering, University of Massachusetts Amherst , Amherst, Massachusetts 01003-9303, United States
| | - Hiu Fai Yeung
- Department of Chemical Engineering, University of Massachusetts Amherst , Amherst, Massachusetts 01003-9303, United States
| | - Wei Fan
- Department of Chemical Engineering, University of Massachusetts Amherst , Amherst, Massachusetts 01003-9303, United States
| | - Jessica D Schiffman
- Department of Chemical Engineering, University of Massachusetts Amherst , Amherst, Massachusetts 01003-9303, United States
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14
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Abstract
The work presented demonstrates an unconventional approach in the preparation of smart microneedle (MN) coatings utilising electrohydrodynamic atomisation (EHDA) principles. Stainless steel (600-900 µm in height) MNs were coupled to a ground electrode (in the EHDA coating set-up) with the deposition distance and collecting methodology varied for an ethanol:methanol (50:50) vehicle system. The preparation of nano- and micrometre-scaled pharmaceutical coatings was achieved. Fluorescein dye (serving as potential drug, sensory materials or disease state markers) and polyvinylpyrrolidone (PVP, polymer matrix system) formed the remaining components of the coating formulation. Based on these excipients and by varying the coating process, particles (100 nm to 3 µm) and fibres (400 nm to 1 µm) were deposited directly on MNs in controlled and selectable fashion (flow rates variable ∼ 5-50 µL/min, applied voltage variable 6-19 kV). These demonstrated options for multiple targeting and analysis applications. The underlying EHDA process permits room temperature fabrication, controlled output and scale-up potential for emerging MN devices as drug systems or lab-chip testing devices.
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Affiliation(s)
- H Khan
- Leicester School of Pharmacy, De Montfort University , Leicester , UK
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Coburn J, Gibson M, Bandalini PA, Laird C, Mao HQ, Moroni L, Seliktar D, Elisseeff J. Biomimetics of the Extracellular Matrix: An Integrated Three-Dimensional Fiber-Hydrogel Composite for Cartilage Tissue Engineering. Smart Struct Syst 2011; 7:213-222. [PMID: 22287978 PMCID: PMC3266370 DOI: 10.12989/sss.2011.7.3.213] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The native extracellular matrix (ECM) consists of an integrated fibrous protein network and proteoglycan-based ground (hydrogel) substance. We designed a novel electrospinning technique to engineer a three dimensional fiber-hydrogel composite that mimics the native ECM structure, is injectable, and has practical macroscale dimensions for clinically relevant tissue defects. In a model system of articular cartilage tissue engineering, the fiber-hydrogel composites enhanced the biological response of adult stem cells, with dynamic mechanical stimulation resulting in near native levels of extracellular matrix. This technology platform was expanded through structural and biochemical modification of the fibers including hydrophilic fibers containing chondroitin sulfate, a significant component of endogenous tissues, and hydrophobic fibers containing ECM microparticles.
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Affiliation(s)
- Jeannine Coburn
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland
| | - Matt Gibson
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland
| | | | - Christopher Laird
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland
| | - Hai-Quan Mao
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland
| | - Lorenzo Moroni
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland
| | - Dror Seliktar
- Faculty of Biomedical Engineering, Technion - Israel Institute of Technology, Technion City, Haifa, Israel
| | - Jennifer Elisseeff
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland
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