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合成了一种侧链型磺化二胺单体2,2’-双(4-磺酸基苯氧基)联苯胺(2,2-’BSPOB),将这种磺化二胺单体与1,4,5,8-萘四羧酸二酐(NTDA)及一种非磺化二胺单体4,4’-双(4-氨基苯氧基)联苯(BAPB)共聚,制得了一系列具有不同离子交换容量(IEC)的侧链型全芳香磺化聚酰亚胺。在高相对湿度下,这些磺化聚酰亚胺膜具有与Nafion112相当甚至更高的质子导电率。此外,这些磺化聚酰亚胺膜在100℃去离子水中浸泡2000h后依然保持良好的力学强度,而且在膜平面方向的尺寸变化极小(<5%),在质子交换膜燃料电池上有着潜在的应用前景。
A side chain sulfonated diamine monomer 2,2’-bis (4-sulfophenoxy) benzidine (2,2-’BSPOB) was synthesized. The sulfonated diamine monomer was reacted with 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTDA) and a non-sulfonated diamine monomer 4,4’-bis (4-aminophenoxy) biphenyl (BAPB) A series of side-chain, all-aromatic sulfonated polyimides with different ion exchange capacity (IEC). At high relative humidity, these sulfonated polyimide membranes have proton conductivity that is even higher than Nafion 112. In addition, these sulfonated polyimide films retain good mechanical strength after being immersed in deionized water at 100 ° C for 2000 h, and have very small dimensional changes in the plane of the film (<5%). They also have proton exchange membrane fuel cells Potential application prospects.