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Improvement of Oxidative Stability for Non-fluorinated Membranes Prepared by Substituted Styrene Monomers  

Moon, Seung-Hyeon (Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology(GIST))
Woo, Jung-Je (Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology(GIST))
Fu, Rong-Qiang (Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology(GIST))
Seo, Seok-Jun (Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology(GIST))
Yun, Sung-Hyun (Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology(GIST))
Publication Information
Membrane Journal / v.17, no.4, 2007 , pp. 294-301 More about this Journal
Abstract
To improve oxidative stability of non-fluorinated styrene-based polymer electrolyte membranes, copolymerized membranes were prepared using styrene derivatives such as p-methylstyrene, t-butylstyrene, and ${\alpha}-methylstyrene$ by monomer sorption method. Prepared membrane was characterized by measurement of weight gain ratio, water content, ion-exchange capacity, proton conductivity, and oxidative stability under the accelerated condition. It was found that each step of monomer sorption method including sorption, polymerization and sulfonation could be affected by the properties and the structures of styrenederivatives. Due to difficulty of polymerization, ${\alpha}$-methylstyrene was copolymerized with styrene or p-methylstyrene. Prepared membrane using ${\alpha}-methylstyrene$ and styrene showed higher performance and stability comparing to copolymerized membrane with styrene. However, copolymerized membranes with ${\alpha}-methylstyrene$ did not showed much improved oxidative stability comparing to styrene membrane due to their lower molecular weight. The t-butylstyrene membrane showed a low performance due to substituted bulky-butyl group which prevents sorption and sulfonation reaction. However, copolymerized t-butylstyrene membranes with p-methylstyrene showed good performance and much improved stability than the styrene membranes.
Keywords
polymer electrolyte membrane; fuel cell; styrene derivative; oxidative stability; monomer sorption;
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1 F. Barbir and T. Gomez, 'Efficiency and economics of proton exchange membrane (PEM) fuel cells', International Journal of Hydrogen Energy, 21(10), 891 (1996)   DOI   ScienceOn
2 R. A. Assink, C. Arnold, and R. P. Hollandsworth, 'Preparation of oxidatively stable cation-exchange membranes by the elimination of tertiary hydrogens', Journal of Membrane Science, 56(2), 143 (1991)   DOI   ScienceOn
3 A. A. M. F. Filho and A. S. Gomes, 'Copolymerization of styrene onto polyethersulfone films induced by gamma ray irradiation', Polymer Bulletin, 57(4), 415 (2006)   DOI   ScienceOn
4 L. Gubler et al., 'Advanced monomer combinations for radiation grafted fuel cell membranes', Electrochemistry Communications, 8(8), 1215 (2006)   DOI   ScienceOn
5 J. H. Chen et al., 'Preparation and characterization of chemically stable polymer electrolyte membranes by radiation-induced graft copolymerization of four monomers into ETFE films', Journal of Membrane Science, 269(1-2), 194 (2006)   DOI   ScienceOn
6 T. J. Schmidt, K. Simbeck, and G. G. Scherer, 'Influence of Cross-Linking on Performance of Radiation-Grafted and Sulfonated FEP 25 Membranes in H[sub 2]-O[sub 2] PEFC', Journal of the Electrochemical Society, 152(1), A93 (2005)
7 F. N. Buchi et al., 'Study of Radiation-Grafted Fep-G-Polystyrene Membranes as Polymer Electrolytes in Fuel-Cells', Electrochimica Acta, 40(3), 345 (1995)   DOI   ScienceOn
8 임지원, 천세원, 전지현, 남상용, '폴리비닐알콜을 이용한 직접메탄을 연료전지용 이온교환막 제조에 관한 연구', 한국막학회지: 멤브레인, 13(3), 191 (2003)
9 J. A. Kerres, 'Development of ionomer membranes for fuel cells', Journal of Membrane Science, 185(1), 3 (2001)   DOI   ScienceOn
10 이영무, 이선용, '설폰산기를 함유한 PVA막의 직접 메탄올 연료전지 응용', 한국막학회지: 멤브레인, 14(3), 240 (2004)
11 J. H. Chen et al., 'Improvement of chemical stability of polymer electrolyte fuel cell membranes by grafting of new substituted styrene monomers into ETFE films', Journal of Materials Science, 41(4), 1289 (2006)   DOI   ScienceOn
12 김정훈, 신정필, 박인준, 이수복, 서동학, '직접 메탄올 연료전지를 위한 술폰화 폴리스티렌/테플론 복합막 제조 및 특성연구', 한국막학회지: 멤브레인, 14(2), 173 (2004)