101
|
Chen L, Hou Z, Lu X, Chen P, Liu Z, Shen L, Bian X, Qin Q. Antifouling microfiltration membranes prepared from poly(vinylidene fluoride)-graft-Poly(N- vinyl pyrrolidone) powders synthesized via pre-irradiation induced graft polymerization. J Appl Polym Sci 2012. [DOI: 10.1002/app.38625] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
102
|
Enomoto K, Takahashi S, Rohani R, Maekawa Y. Synthesis of copolymer grafts containing sulfoalkyl and hydrophilic groups in polymer electrolyte membranes. J Memb Sci 2012. [DOI: 10.1016/j.memsci.2012.04.035] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
103
|
Sand A, Mishra DK, Pandey VS, Mishra MM, Behari K. Synthesis of graft copolymer (CgOH-g-AGA): Physicochemical properties, characterization and application. Carbohydr Polym 2012; 90:901-7. [DOI: 10.1016/j.carbpol.2012.06.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Revised: 05/21/2012] [Accepted: 06/10/2012] [Indexed: 10/28/2022]
|
104
|
Radiation-induced synthesis of solid alkaline exchange membranes with quaternized 1,4-diazabicyclo[2,2,2] octane pendant groups for fuel cell application. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.08.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
105
|
Yadav M, Rhee KY. Superabsorbent nanocomposite (alginate-g-PAMPS/MMT): Synthesis, characterization and swelling behavior. Carbohydr Polym 2012; 90:165-73. [DOI: 10.1016/j.carbpol.2012.05.010] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Revised: 04/27/2012] [Accepted: 05/04/2012] [Indexed: 10/28/2022]
|
106
|
Preparation, characterization, and process performance of composite fibrous adsorbents as cation exchangers for high throughput and high capacity bioseparations. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 903:14-22. [DOI: 10.1016/j.jchromb.2012.06.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Revised: 06/19/2012] [Accepted: 06/21/2012] [Indexed: 11/17/2022]
|
107
|
Tillet G, De Leonardis P, Alaaeddine A, Umeda M, Mori S, Shibata N, Aly SM, Fortin D, Harvey PD, Ameduri B. Design and Photonic Properties of Novel Fluorinated Copolymers Bearing Phthalocyanine Side Groups. MACROMOL CHEM PHYS 2012. [DOI: 10.1002/macp.201200076] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
108
|
Sohn JY, Sung HJ, Shin J, Ko BS, Song JM, Nho YC. Radiation grafting of binary monomers for the preparation of organic/inorganic hybrid membrane for proton exchange membrane fuel cell application. Macromol Res 2012. [DOI: 10.1007/s13233-012-0131-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
109
|
Kinger N, Ko BS, Sohn JY, Nho YC, Shin J. Synthesis of poly((vinyloxy)ethanesulfonic acid)-grafted ETFE membrane via radiation grafting and its characterization. J Appl Polym Sci 2012. [DOI: 10.1002/app.36719] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
110
|
Sadurní P, Alagón A, Aliev R, Burillo G, Hoffman AS. Immobilization of streptavidin-horseradish peroxidase onto a biotinylated poly(acrylic acid) backbone that had been radiation-grafted to a PTFE film. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 16:181-7. [PMID: 15794484 DOI: 10.1163/1568562053115444] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Films of polytetrafluoroethylene (PTFE) were modified by radiation graft polymerization of acrylic acid (AAc). Optimal conditions for efficient AAc grafting were studied, including pre-irradiation dose in air, monomer concentration, temperature and time of the grafting process. Carboxylic groups of the grafted polyAAc were activated with carbodiimide (EDC) for biotinylation by reaction with 5-(biotinamido) pentylamine. Streptavidin-horseradish peroxidase (SA-HRP) was immobilized by affinity complexation of the SA with the biotin groups on the PTFE surface. The amount of active HRP immobilized on the PTFE films was determined as a function of the extent of polyAAc grafting. This study has demonstrated the utility of combining the processes of (a) radiation grafting of polymers with reactive groups onto inert polymers such as PTFE, (b) biotinylation of the graft polymer reactive groups, (c) immobilization of streptavidin on the biotinylated surface sites, followed by (d) immobilization of biotinylated, biologically active molecules via complexation of their conjugates with streptavidin. In this study, the last two steps were combined by immobilizing the complex of streptavidin and biotinylated HRP onto the biotinylated surface sites. The unique nature of this process is the ability to immobilize biotinylated molecules on an inert surface as PTFE.
Collapse
Affiliation(s)
- Patricia Sadurní
- Instituto de Ciencias Nucleares, UNAM, Ciudad Universitaria, 04510 México, DF, México
| | | | | | | | | |
Collapse
|
111
|
Xu C, Huang W, Zhou Y, Yan D, Chen S, Huang H. Graft copolymerization of N-vinyl-2-pyrrolidone onto pre-irradiated poly(vinylidene fluoride) powder. Radiat Phys Chem Oxf Engl 1993 2012. [DOI: 10.1016/j.radphyschem.2011.12.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
112
|
Zhang B, Zhang Y, Peng C, Yu M, Li L, Deng B, Hu P, Fan C, Li J, Huang Q. Preparation of polymer decorated graphene oxide by γ-ray induced graft polymerization. NANOSCALE 2012; 4:1742-1748. [PMID: 22307684 DOI: 10.1039/c2nr11724j] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Herein, we report a facile approach to decorate graphene oxide (GO) sheets with poly(vinyl acetate) (PVAc) by γ-ray irradiation-induced graft polymerization. The content of PVAc in the obtained sample, i.e., PVAc grafted GO (GO-g-PVAc) is calculated by the loss weight in thermogravimetric analysis (TGA) curves. A GO-g-PVAc sample with a degree of grafting (DG) of 28.5% was well dispersed in common organic solvents and the dispersions obtained were extremely stable at room temperature without any aggregation, even after standing for 2 months. The excellent dispersibility and stability of GO-g-PVAc in common organic solvents are readily rationalized in terms of the full coverage of PVAc chains and solvated layer formation on graphene oxide sheets surface, which weakens the interlaminar attraction of GO sheets. This approach presents a facile route for the preparation of dispersible GO and shows great potential in the preparation of graphene-based composites by solution-processes.
Collapse
Affiliation(s)
- Bowu Zhang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, No. 2019, Jialuo Road, Jiading District, Shanghai, 201800, PR China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
113
|
Sen G, Mishra S, Rani GU, Rani P, Prasad R. Microwave initiated synthesis of polyacrylamide grafted Psyllium and its application as a flocculant. Int J Biol Macromol 2012; 50:369-75. [DOI: 10.1016/j.ijbiomac.2011.12.014] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2011] [Revised: 12/09/2011] [Accepted: 12/14/2011] [Indexed: 11/29/2022]
|
114
|
Thakur VK, Lin MF, Tan EJ, Lee PS. Green aqueous modification of fluoropolymers for energy storage applications. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm15665b] [Citation(s) in RCA: 125] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
115
|
Gautam D, Gupta B, Ikram S. Radiation-induced graft copolymerization of α-methyl styrene and butyl acrylate mixture into polyetheretherketone films. J Appl Polym Sci 2012. [DOI: 10.1002/app.38365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
116
|
Qu Z, Muthukrishnan S, Urlam MK, Haller CA, Jordan SW, Kumar VA, Marzec UM, Elkasabi Y, Lahann J, Hanson SR, Chaikof EL. A biologically active surface enzyme assembly that attenuates thrombus formation. ADVANCED FUNCTIONAL MATERIALS 2011; 21:4736-4743. [PMID: 23532366 PMCID: PMC3606904 DOI: 10.1002/adfm.201101687] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Activation of hemostatic pathways by blood-contacting materials remains a major hurdle in the development of clinically durable artificial organs and implantable devices. We postulate that surface-induced thrombosis may be attenuated by the reconstitution onto blood contacting surfaces of bioactive enzymes that regulate the production of thrombin, a central mediator of both clotting and platelet activation cascades. Thrombomodulin (TM), a transmembrane protein expressed by endothelial cells, is an established negative regulator of thrombin generation in the circulatory system. Traditional techniques to covalently immobilize enzymes on solid supports may modify residues contained within or near the catalytic site, thus reducing the bioactivity of surface enzyme assemblies. In this report, we present a molecular engineering and bioorthogonal chemistry approach to site-specifically immobilize a biologically active recombinant human TM fragment onto the luminal surface of small diameter prosthetic vascular grafts. Bioactivity and biostability of TM modified grafts is confirmed in vitro and the capacity of modified grafts to reduce platelet activation is demonstrated using a non-human primate model. These studies indicate that molecularly engineered interfaces that display TM actively limit surface-induced thrombus formation.
Collapse
Affiliation(s)
- Zheng Qu
- Departments of Biomedical Engineering and Surgery, Georgia Institute of Technology and Emory University Atlanta, GA 30322 (USA)
| | - Sharmila Muthukrishnan
- Departments of Biomedical Engineering and Surgery, Georgia Institute of Technology and Emory University Atlanta, GA 30322 (USA)
| | - Murali K. Urlam
- Departments of Biomedical Engineering and Surgery, Georgia Institute of Technology and Emory University Atlanta, GA 30322 (USA)
| | - Carolyn A. Haller
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, and the Wyss Institute of Biologically Inspired Engineering of Harvard University Boston, MA 02115 (USA)
| | - Sumanas W. Jordan
- Departments of Biomedical Engineering and Surgery, Georgia Institute of Technology and Emory University Atlanta, GA 30322 (USA)
| | - Vivek A. Kumar
- Departments of Biomedical Engineering and Surgery, Georgia Institute of Technology and Emory University Atlanta, GA 30322 (USA)
| | - Ulla M. Marzec
- Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR 97006 (USA)
| | - Yaseen Elkasabi
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109 (USA)
| | - Joerg Lahann
- Department of Chemical Engineering, University of Michigan, Ann Arbor, MI 48109 (USA)
| | - Stephen R. Hanson
- Oregon National Primate Research Center, Oregon Health and Science University Beaverton, OR 97006 (USA)
| | - Elliot L. Chaikof
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, and the Wyss Institute of Biologically Inspired Engineering of Harvard University Boston, MA 02115 (USA)
| |
Collapse
|
117
|
Enomoto K, Takahashi S, Maekawa Y. A Novel Characterization Method for Graft-Polymer Structures Chemically Attached on Thermally Stable Polymer Films. MACROMOL CHEM PHYS 2011. [DOI: 10.1002/macp.201100341] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
118
|
Ahmed M, Khan MA, Miah MR, Monim SA, Khan MAH. Gamma Radiation-Induced Graft Copolymerization of Styrene Onto Polyethyleneterephthalate Films: Application in Fuel Cell Technology as a Proton Exchange Membrane. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2011. [DOI: 10.1080/10601325.2011.614865] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
119
|
Mishra S, Sen G, Rani GU, Sinha S. Microwave assisted synthesis of polyacrylamide grafted agar (Ag-g-PAM) and its application as flocculant for wastewater treatment. Int J Biol Macromol 2011; 49:591-8. [DOI: 10.1016/j.ijbiomac.2011.06.015] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Revised: 05/31/2011] [Accepted: 06/13/2011] [Indexed: 11/29/2022]
|
120
|
Performance enhancement of ionic polymer-metal composite actuators based on radiation-grafted Poly(ethylene-co-tetrafluoroethylene). Macromol Res 2011. [DOI: 10.1007/s13233-011-1003-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
121
|
Contreras-García A, Bucio E, Concheiro A, Alvarez-Lorenzo C. Surface functionalization of polypropylene devices with hemocompatible DMAAm and NIPAAm grafts for norfloxacin sustained release. J BIOACT COMPAT POL 2011. [DOI: 10.1177/0883911511407788] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
To improve the hemocompatibility and elution of antimicrobial agents for medical devices, N,N′-dimethylacrylamide (DMAAm) and N-isopropylacrylamide (NIPAAm) were sequentially grafted onto polypropylene (PP) films. Various (PP-g-DMAAm)-g-NIPAAm grafts were prepared using different time periods of irradiation while keeping the radiation dose constant. The hydrogel layer that formed on the surface of the PP was temperature-responsive (shifted from 32°C for NIPAAm to 37°C for the copolymer). The (PP-g-DMAAm)-g-NIPAAm films adsorbed serum albumin but not fibrinogen and had significantly lower hemolytic and thrombogenic activity. The DMAAm promoted the loading of norfloxacin (13.3 μg cm—2) when the hydrogel layer was swollen; as the NIPAAm shrank, a sustained delivery (∼6 h) occurred at body temperature. These functionalized PP films have potential as hemo- and cyto-compatible materials for medical devices and drug delivery products.
Collapse
Affiliation(s)
- Angel Contreras-García
- Departamento de Química de Radiaciones y Radioquímica, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, México DF 04510, México, Departamento de Farmacia y Tecnología Farmacéutica, Universidad de Santiago de Compostela, 15782-Santiago de Compostela, Spain
| | - Emilio Bucio
- Departamento de Química de Radiaciones y Radioquímica, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, México DF 04510, México
| | - Angel Concheiro
- Departamento de Farmacia y Tecnología Farmacéutica, Universidad de Santiago de Compostela, 15782-Santiago de Compostela, Spain
| | - Carmen Alvarez-Lorenzo
- Departamento de Farmacia y Tecnología Farmacéutica, Universidad de Santiago de Compostela, 15782-Santiago de Compostela, Spain,
| |
Collapse
|
122
|
Liu F, Hashim NA, Liu Y, Abed MM, Li K. Progress in the production and modification of PVDF membranes. J Memb Sci 2011. [DOI: 10.1016/j.memsci.2011.03.014] [Citation(s) in RCA: 1500] [Impact Index Per Article: 115.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
123
|
Chang Y, Shih YJ, Ko CY, Jhong JF, Liu YL, Wei TC. Hemocompatibility of poly(vinylidene fluoride) membrane grafted with network-like and brush-like antifouling layer controlled via plasma-induced surface PEGylation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:5445-5455. [PMID: 21449586 DOI: 10.1021/la1048369] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In this work, the hemocompatibility of PEGylated poly(vinylidene fluoride) (PVDF) microporous membranes with varying grafting coverage and structures via plasma-induced surface PEGylation was studied. Network-like and brush-like PEGylated layers on PVDF membrane surfaces were achieved by low-pressure and atmospheric plasma treatment. The chemical composition, physical morphology, grafting structure, surface hydrophilicity, and hydration capability of prepared membranes were determined to illustrate the correlations between grafting qualities and hemocompatibility of PEGylated PVDF membranes in contact with human blood. Plasma protein adsorption onto different PEGylated PVDF membranes from single-protein solutions and the complex medium of 100% human plasma were measured by enzyme-linked immunosorbent assay (ELISA) with monoclonal antibodies. Hemocompatibility of the PEGylated membranes was evaluated by the antifouling property of platelet adhesion observed by scanning electron microscopy (SEM) and the anticoagulant activity of the blood coagulant determined by testing plasma-clotting time. The control of grafting structures of PEGylated layers highly regulates the PVDF membrane to resist the adsorption of plasma proteins, the adhesion of platelets, and the coagulation of human plasma. It was found that PVDF membranes grafted with brush-like PEGylated layers presented higher hydration capability with binding water molecules than with network-like PEGylated layers to improve the hemocompatible character of plasma protein and blood platelet resistance in human blood. This work suggests that the hemocompatible nature of grafted PEGylated polymers by controlling grafting structures gives them great potential in the molecular design of antithrombogenic membranes for use in human blood.
Collapse
Affiliation(s)
- Yung Chang
- R&D Center for Membrane Technology and Department of Chemical Engineering, Chung Yuan Christian University, Chung-Li, Taoyuan 320, Taiwan.
| | | | | | | | | | | |
Collapse
|
124
|
Synthesis of partially hydrolyzed graft copolymer (H-partially carboxymethylated guar gum-g-methacrylic acid): A superabsorbing material. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2011.01.023] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
125
|
Khan MB, Ahmed M, Khan MA, Alam SS, Khan MAH. Preparation of poly(ethylene terephthalate)-based proton-exchange membranes through the ultraviolet-induced graft copolymerization of allyl methacrylate for applications in fuel cells. J Appl Polym Sci 2011. [DOI: 10.1002/app.33779] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
126
|
Deng B, Yu Y, Zhang B, Yang X, Li L, Yu M, Li J. Graft polymerization of acrylic acid and methacrylic acid onto poly(vinylidene fluoride) powder in presence of metallic salt and sulfuric acid. Radiat Phys Chem Oxf Engl 1993 2011. [DOI: 10.1016/j.radphyschem.2010.07.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
127
|
Influence of physical parameters on mutual polymer grafting by electron beam irradiation. Radiat Phys Chem Oxf Engl 1993 2011. [DOI: 10.1016/j.radphyschem.2010.07.029] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
128
|
Oshima A, Sato Y, Shiraki F, Mitani N, Fujii K, Oshima Y, Fujita H, Washio M. Fabrication of PEFC membrane based on perfluorinated polymer using quantum beam induced grafting technique. Radiat Phys Chem Oxf Engl 1993 2011. [DOI: 10.1016/j.radphyschem.2010.07.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
129
|
Thakur VK, Tan EJ, Lin MF, Lee PS. Poly(vinylidene fluoride)-graft-poly(2-hydroxyethyl methacrylate): a novel material for high energy density capacitors. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm02408b] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
130
|
Preirradiation Graft Polymerization of Styrene in a Poly(tetrafluoroethylene) Film Investigated by Time-Resolved Small-Angle Neutron Scattering. INT J POLYM SCI 2011. [DOI: 10.1155/2011/301807] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Preirradiation graft polymerization of styrene in a poly(tetrafluoroethylene) (PTFE) film was examined by time-resolved small-angle neutron scattering (SANS). A crosslinked PTFE film, thickness of which is about 50 μm, was irradiated byγ-ray and immersed in a mixed solvent of styrene monomer and toluene. SANS elucidated that graft polymerization proceeds by two reaction processes (I) and (II). In process (I) at min, graft polymerization occurs at an interface between crystalline and amorphous PTFE domains and the grafted polystyrene segregates from PTFE, forming a thin layer with a sharp interface. In process (II) at min, grafted PS layer starts to bridge between crystalline domains. At the end of process (II), 40% of total crystalline PTFE domain is covered by the grafted PS chains.
Collapse
|
131
|
|
132
|
Hasegawa S, Takahashi S, Iwase H, Koizumi S, Morishita N, Sato K, Narita T, Ohnuma M, Maekawa Y. Radiation-induced graft polymerization of functional monomer into poly(ether ether ketone) film and structure-property analysis of the grafted membrane. POLYMER 2011. [DOI: 10.1016/j.polymer.2010.11.009] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
133
|
Enomoto K, Takahashi S, Iwase T, Yamashita T, Maekawa Y. Degradation manner of polymer grafts chemically attached on thermally stable polymer films: swelling-induced detachment of hydrophilic grafts from hydrophobic polymer substrates in aqueous media. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm04084c] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
134
|
Affiliation(s)
- Ameduri Bruno
- Engineering and Macromolecular Architectures, Institut Charles Gerhardt UMR (CNRS) 5253, Ecole Nationale Supérieure de Chimie de Montpellier, 8, Rue Ecole Normale, 34296 Montpellier Cedex 5, France
| |
Collapse
|
135
|
Chandler-Temple AF, Wentrup-Byrne E, Griesser HJ, Jasieniak M, Whittaker AK, Grøndahl L. Comprehensive characterization of grafted expanded poly(tetrafluoroethylene) for medical applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:15409-15417. [PMID: 20812688 DOI: 10.1021/la1010677] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Successful implantation of any biomaterial depends on its mechanical, architectural, and surface properties. Materials with good bulk properties seldom possess the appropriate surface characteristics required for good biointegration. The present study investigates the results of surface modification of a highly porous, fully fluorinated polymeric substrate, expanded poly(tetrafluoroethylene) (ePTFE), with a view to improving the surface bioactivity and hence ultimately its biointegration. Modification involved gamma irradiation-induced graft copolymerization with the monomers monoacryloxyethyl phosphate (MAEP) and methacryloxyethyl phosphate (MOEP) in various solvent systems (water, methanol, methyl ethyl ketone, and mixtures thereof). In order to determine the penetration depth of the graft copolymer into the pores and/or the bulk of the ePTFE membranes, angle-dependent X-ray photoelectron spectroscopy (XPS) and magnetic resonance imaging (MRI) were used. It was found that the penetration depth was critically affected by the choice of monomer and solvent as well as by the technique used to remove dissolved oxygen from the grafting mixture: nitrogen degassing versus vacuum. Difficulties due to the porous nature of the membranes in establishing the lateral position of the graft copolymers were largely overcome by combining data from microattenuated total reflectance Fourier transfer infrared (μ-ATR-FTIR) mapping and time-of-flight secondary ion mass spectrometry (ToF-SIMS) imaging. Results show that the large variation in graft heterogeneity found between different samples is largely an effect of the underlying substrate and choice of monomer. The results from this study provide the necessary knowledge and experimental data to control both the graft copolymer lateral position and depth of penetration in these porous ePTFE membranes.
Collapse
Affiliation(s)
- Adrienne F Chandler-Temple
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia Q 4072, Australia
| | | | | | | | | | | |
Collapse
|
136
|
Grafting of styrene into pre-irradiated fluoropolymer films: Influence of base material and irradiation temperature. Radiat Phys Chem Oxf Engl 1993 2010. [DOI: 10.1016/j.radphyschem.2010.05.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
137
|
Wentrup-Byrne E, Suzuki S, Suwanasilp JJ, Grøndahl L. Novel phosphate-grafted ePTFE copolymers for optimum
in vitro
mineralization. Biomed Mater 2010; 5:045010. [DOI: 10.1088/1748-6041/5/4/045010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
138
|
Nasef MM, Saidi H, Dahlan KZM. Acid-synergized grafting of sodium styrene sulfonate onto electron beam irradiated-poly(vinylidene fluoride) films for preparation of fuel cell membrane. J Appl Polym Sci 2010. [DOI: 10.1002/app.32407] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
139
|
Fei G, Kang SA, Ko BS, Lee YS, Chang Nho Y, Shin J. Influence of the radiation grafting conditions on the cross-sectional distribution of poly(vinylbenzyl chloride) grafted polymer onto poly(tetrafluoroethylene-co-hexafluoropropylene) films. J Appl Polym Sci 2010. [DOI: 10.1002/app.32078] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
140
|
Geraldes AN, Zen HA, Ribeiro G, Ferreira HP, Souza CP, Parra DF, Santiago EI, Lugão AB. Post-irradiation time effects on the graft of poly(ethylene-alt-tetrafluoroethylene) (ETFE) films for ion exchange membrane application. Radiat Phys Chem Oxf Engl 1993 2010. [DOI: 10.1016/j.radphyschem.2009.08.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
141
|
Ameduri B. From vinylidene fluoride (VDF) to the applications of VDF-containing polymers and copolymers: recent developments and future trends. Chem Rev 2010; 109:6632-86. [PMID: 19731907 DOI: 10.1021/cr800187m] [Citation(s) in RCA: 427] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bruno Ameduri
- Engineering and Macromolecular Architectures, Institut Charles Gerhardt UMR (CNRS) 5253, Ecole Nationale Supérieure de Chimie de Montpellier, 8 Rue Ecole Normale, 34296 Montpellier Cedex 5, France.
| |
Collapse
|
142
|
Yun JM, Jung CH, Kim DK, Hwang IT, Choi JH, Ganesan R, Kim JB. Photosensitive polymer brushes grafted onto PTFE film surface for micropatterning of proteins. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b923937e] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
143
|
Yu M, Zhang B, Deng B, Yang X, Sheng K, Xie L, Lu X, Li J. Preirradiation-induced emulsion graft polymerization of glycidyl methacrylate onto poly(vinylidene fluoride) powder. J Appl Polym Sci 2010. [DOI: 10.1002/app.32288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
144
|
Graft copolymerization of methoxyacrylethyl phosphate onto expanded poly(tetrafluoroethylene) facial membranes. J Appl Polym Sci 2010. [DOI: 10.1002/app.31242] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
145
|
Fei G, Shin J, Kang SA, Ko BS, Kang PH, Lee YS, Nho YC. Preparation and characterization of a poly(vinylbenzyl sulfonic acid)-grafted FEP membrane. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pola.23762] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
146
|
El-Hag Ali A, Mostafa TB, Raafat AI. Chemical modification-induced improvement in the electrical characteristics of radiation-functionalized polypropylene sheets. POLYM INT 2009. [DOI: 10.1002/pi.2739] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
147
|
Zhang S, Zhang Q, Chen S, Yuan Q, Li P. Irradiation-induced grafting of acrylonitrile onto activated carbon fiber. POLYM ADVAN TECHNOL 2009. [DOI: 10.1002/pat.1394] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
148
|
Radiation-induced graft polymerization of styrene into a poly(ether ether ketone) film for preparation of polymer electrolyte membranes. J Memb Sci 2009. [DOI: 10.1016/j.memsci.2009.08.030] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
149
|
Chen J, Li D, Koshikawa H, Zhai M, Asano M, Oku H, Maekawa Y. Modification of ultrathin polyetheretherketone film for application in direct methanol fuel cells. J Memb Sci 2009. [DOI: 10.1016/j.memsci.2009.08.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
150
|
Hanh TT, Takahashi S, Chen J, Sawada SI, Maekawa Y. Polymer electrolyte membranes having sulfoalkyl grafts into ETFE film prepared by radiation-induced copolymerization of methyl acrylate and methyl methacrylate. J Appl Polym Sci 2009. [DOI: 10.1002/app.30458] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|