Synthesis and properties of novel sulfonated polyimides bearing sulfophenyl pendant groups for polymer electrolyte fuel cell application
Synthesis and properties of novel sulfonated polyimides bearing sulfophenyl pendant groups for polymer electrolyte fuel cell application
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DOI：
10.1016/j.polymer.2007.02.011
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发表时间：
2007-03
期刊：
影响因子：
4.6
通讯作者：
Zhaoxia Hu;Yan Yin;H. Kita;K. Okamoto;Yoshiki Suto;H. Wang;H. Kawasato
中科院分区：
文献类型：
--
作者：
Zhaoxia Hu;Yan Yin;H. Kita;K. Okamoto;Yoshiki Suto;H. Wang;H. Kawasato
合成了一种新型的含磺基苯基侧基的磺化二胺2，2 ′-（4-磺基苯基）联苯胺（BSPhB）。以1，4，5，8-萘四甲酸二酐、BSPhB和其它非磺化二胺为原料合成了磺化聚酰亚胺。离子交换容量（IEC）为1.5-2.8meqg− 1的SPI具有3- 10 dLg − 1的高比浓粘度和320°C的高磺化温度。SPI膜坚韧、柔韧性好，断裂应力大于80 MPa，伸长率为80- 100%。它们在水中表现出高度各向异性的膜溶胀，厚度方向的溶胀大于平面方向的溶胀。它们显示出相当高的质子传导率（σ）。例如，IEC为1.77meqg− 1的膜在60 ° C和120°C下的σ值分别为120和260 mScm − 1。它们还表现出相当高的水稳定性。
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 1.5–2.8meqg−1showed high reduced viscosity of 3–10dLg−1and high desulfonation temperature of 320°C. The SPI membranes were tough and flexible, having high stress at break of more than 80MPa 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 (σ). For example, the membrane with IEC of 1.77meqg−1exhibited σ values of 120 and 260mScm−1at 60 and 120°C, respectively, in water. They also showed fairly high water stability.