標題: Preparation and characterization of high-durability zwitterionic crosslinked proton exchange membranes
作者: Ye, Yun-Sheng
Chen, Wen-Yi
Huang, Yao-Jheng
Cheng, Ming-Yao
Yen, Ying-Chieh
Cheng, Chih-Chia
Chang, Feng-Chih
應用化學系
Department of Applied Chemistry
關鍵字: Fuel cells;Polymer-electrolyte membrane;Sulfonated polymer;Crosslinked membranes;Proton conductor
公開日期: 15-Oct-2010
摘要: The present present paper describes the development of a novel proton exchange membrane comprising a poly (styrene sulfonic acid-co-4-vinylpyridine) copolymer that was crosslinked with a haloalkyl crosslinker through the formation of ionic bonding linkages The nucleophilic substitution of these crosslinked membranes as well as a model reaction between pyridine and 1-bromobutane was confirmed by nuclear magnetic resonance (NMR) Tough and flexible membranes of a high mechanical strength were prepared. They demonstrated very elevated thermal, hydrolytic and oxidative stabilities as compared to other sulfonated polymers. The crosslinked membrane composed of zwitterionic molecules with a crosslinking fraction of 90.3, denoted SP-1, exhibited a proton conductivity of ca 7 1 x 10(-2) S cm(-1) at 30 degrees C under 90% relative humidity; a value comparable to that of Nafion 117 Moreover, the crosslinked SP-1 membrane possessed the highest selectivity for methanol fuel cells (3 38 x 10(5) S cm(-3) s), approximately five times that of Nafion 117. thus implying its potential for practical use in high-energy-density devices (C) 2010 Elsevier B.V All rights reserved.
URI: http://dx.doi.org/10.1016/j.memsci.2010.06.004
http://hdl.handle.net/11536/32069
ISSN: 0376-7388
DOI: 10.1016/j.memsci.2010.06.004
期刊: JOURNAL OF MEMBRANE SCIENCE
Volume: 362
Issue: 1-2
起始頁: 29
結束頁: 37
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