標題: Synthesis and characterization of a novel proton-exchange membrane for fuel cells operating at high temperatures and low Humidities
作者: Chaung, Ching-Nan
Chao, Liang
Huang, Ying-Jie
Hsieh, Tar-Hwa
Chuang, Hung-Yi
Lin, Shu-Chi
Ho, Ko-Shan
材料科學與工程學系奈米科技碩博班
Graduate Program of Nanotechnology , Department of Materials Science and Engineering
關鍵字: membranes;resins;solid state structure
公開日期: 15-Mar-2008
摘要: The synthesis of a p-toluidine/formal dehyde (PTF) resin was performed, and the effects of the molar ratio of the individual monomers and the polymerization conditions on the structure of the PTF resin were studied. Fourier transform infrared and C-13-NMR spectra were used to characterize the PTF. Wide-angle X-ray diffraction patterns revealed the crystalline structures of various PTFs. Polarized optical microscopy revealed that the molar ratio of the monomers had a strong effect on the crystalline morphologies. A longer polymerization time turned out a polymer with a higher intrinsic viscosity and molecular weight, which led to differences in the proton conductivity. All of the PTFs showed a higher proton conductivity than a commercial Nafion membrane at 90-100 degrees C and 0% relative humidity. The proton conductivity of the PTF series could be improved by sulfonation with sulfuric acid and could be maintained after blending with polyurethane. Pure methanol could be used as a fuel source because of the insolubility and nonwetting properties of PTF in methanol to increase the output current density for a PTF membrane electrode assembly. (C) 2007 Wiley Periodicals, Inc.
URI: http://dx.doi.org/10.1002/app.27437
http://hdl.handle.net/11536/9573
ISSN: 0021-8995
DOI: 10.1002/app.27437
期刊: JOURNAL OF APPLIED POLYMER SCIENCE
Volume: 107
Issue: 6
起始頁: 3917
結束頁: 3924
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