Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
637363 | Journal of Membrane Science | 2009 | 7 Pages |
Abstract
A novel sulfonated diamine bearing aromatic sulfophenyl pendant groups, named as, 2,2â²-bis(4-sulfophenyl)-4,4â²-oxydianiline (SPhODA) was synthesized. Sulfonated (co)polyimides (SPIs) with flexible ether linkage in the main chain and sulfophenyl groups in the side chain were synthesized from SPhODA, 1,4,5,8-naphthalene tetracarboxylic dianhydride and nonsulfonated diamines. The SPI membranes showed good solubility in common aprotic solvents and high desulfonation temperature of 320 °C. The SPIs with ion exchange capacities of 1.57-2.50 meq gâ1 displayed reasonably high proton conductivities of 0.09-0.21 S cmâ1 at 60 °C in water and 0.02-0.05 S cmâ1 at 70% relative humidity. They also displayed high mechanical properties, but their water stability was not enough high at high temperatures. They showed high potential for DMFC application at low and/or mediate temperatures.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Zhaoxia Hu, Yan Yin, Ken-ichi Okamoto, Yukari Moriyama, Atsushi Morikawa,