Synthesis and properties of sulfonated copolyimides as PEM for DMFC applications

摘要：

A series of six-membered sulfonated copolyimides (SPIs) were synthesized by one-pot solution polycondensation from 4,4-bis(4-aminophenoxy) biphenyl-3,3-disulfonic acid (BAPBDS), 1,2-dihydro-2-(4-aminophenyl)-4-4-(4-aminophenoxy)-phenyl- phthalazin-1-one (DHPZDA), 4,4-bis(4-aminophenoxy) biphenyl (BAPB) and 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTDA). The SPI membranes had excellent thermal stability, high mechanical property and proton conductivity as well as low methanol permeability. The tensile strength of the membranes was ranged from 59.6 to 84.8MPa, which was higher than that of Nafion (r)112 (26.6MPa). Compared with the methanol permeability of Nafion (r)117(2.38×10 -6 cm 2 /s), the SPI membranes as-made here exhibited much lower methanol permeability ranged from 7.2×10 -8 to 9.2×10 -8 cm 2 /s depending on the DS of the polymers, respectively. All the membranes exhibited desirable proton conductivity ranged from 1.6×10 -3 to 4.2×10 -2S/cm at 95℃.

关键词： proton exchange membrane sulfonated polyimides fuel cell Methanol permeability

作者: Haiyan Pan Xiuling Zhu Xigao Jian

作者单位: Department of Polymer Science and materials, Dalian University of Technology, Dalian, China

会议类型: 国际会议

会议名称: The 12th Asian Pacific Confederation of Chemical Engineering Congress(第十二届亚太化工联盟大会暨化工展览会)

会议地点: 大连

会议语种:英文

在线出版日期: 2008-08-04（万方平台首次上网日期，不代表论文的发表时间）