Synthesis and proton conductivity of sulfopropylated poly(benzimidazole) films

被引:60
作者
Kawahara, M [1 ]
Rikukawa, M [1 ]
Sanui, K [1 ]
Ogata, N [1 ]
机构
[1] Sophia Univ, Dept Chem, Chiyoda Ku, Tokyo 1028554, Japan
关键词
poly(benzimidazole); proton conduction; solid polymer electrolyte fuel cells; propanesultone; water uptake;
D O I
10.1016/S0167-2738(00)00596-8
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A novel proton-conducting polymer, sulfopropylated poly(benzimidazole) (PBI-PS), was synthesized by the ring-opening reaction of 1,3-propanesultone onto the reactive N-H groups of PBI. The equilibrium water uptake of PBI-PS films increased with increases in the relative humidity and sulfoalkylation level, and the maximum value of water uptake reached 11.3 H2O pel sulfonic acid group (H2O/SO3H) at 90% R.H. and room temperature. The hydrous PBI-PS films showed a high proton conductivity of the order of 10(-3) S cm(-1) in the temperature range from 20 degreesC to 140 degreesC, which is superior to that of conventional proton-conducting polymers. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:1193 / 1196
页数:4
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