Synthesis and properties of novel sulfonated polyimides bearing sulfophenyl pendant groups for polymer electrolyte fuel cell application

被引:63
作者
Hu, Zhaoxia
Yin, Yan
Kita, Hidetoshi
Okamoto, Ken-ichi
Suto, Yoshiki
Wang, Honguan
Kawasato, Hironobu
机构
[1] Yamaguchi Univ, Grad Sch Sci & Engn, Dept Adv Mat Sci & Engn, Yamaguchi 7558611, Japan
[2] Yamaguchi Univ, Venture Business Lab, Yamaguchi 7558611, Japan
[3] Nippon Steel Chem Co Ltd, Elect MAt Res & Dev Lab, Chiba 2920835, Japan
关键词
polymer electrolyte membrane; sulfonated polyimide; water stability;
D O I
10.1016/j.polymer.2007.02.011
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
A novel sulfonated diamine bearing sulfophenyl pendant groups of 2,2 '-(4-sulfophenyl) benzidine (BSPhB) was synthesized. Sulfonated polyimides (SPIs) derived from 1,4,5,8-naphthalene tetracarboxylic dianhydride, BSPhB and other non-sulfonated diamines were successfully synthesized. The SPIs with ion exchange capacity (IEC) of 1.5-2.8 meq g(-1) showed high reduced viscosity of 3-10 dL g(-1) and high desulfortation temperature of 320 degrees C. The SPI membranes were tough and flexible, having high stress at break of more than 80 MPa and elongation of 80-100%. They showed highly anisotropic membrane swelling in water with larger swelling in thickness direction than in plane direction. They showed fairly high proton conductivity (sigma). For example, the membrane with IEC of 1.77 meq g(-1) exhibited a values of 120 and 260 mS cm(-1) 60 and 120 degrees C, respectively, in water. They also showed fairly high water stability. (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1962 / 1971
页数:10
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