Synthesis and Characterization of Sulfonated Polyimides Containing Trifluoromethyl Groups as Proton Exchange Membranes
作者:Qingshuang Zhang、Qiaoling Li
DOI:10.1002/cjoc.201180266
日期:2011.7
F‐BAPBDS and nonsulfonated diamine. Flexible and tough membranes of high mechanical strength were obtained by solution casting and the electrolyte properties of the polymers were intensively investigated. The copolymer membranes exhibited excellent oxidative stability due to the introducing of the CF3 groups. The SPI membranes displayed desirable proton conductivity (0.52×10−1–0.97×10−1 S·cm−1) and low
新型磺化二胺4,4'-双(4-氨基-3-三氟甲基苯氧基)联苯3,3'-二磺酸(F-BAPBDS)是通过4,4'-二羟基联苯的亲核芳香取代成功合成的-氯-5-硝基三氟甲苯,然后还原和磺化。一系列高分子量的磺化聚酰亚胺(SPI‐ x,x代表磺化单体的摩尔百分比)是通过将1,4,5,8-萘四羧酸二酐(NTDA)与F-BAPBDS和未磺化的二胺共聚制备的。通过溶液流延获得具有高机械强度的柔性且坚韧的膜,并且对聚合物的电解质性质进行了深入研究。由于引入了CF 3基,该共聚物膜表现出优异的氧化稳定性。SPI膜显示出期望的质子传导性(0.52×10 -1 -0.97×10 -1 S·cm -1)和低的甲醇渗透性(小于2.8×10 -7 cm 2 ·s -1)。最高质子传导率(1.89×10SPI‐90膜在80°C下获得-1 S·cm -1),IEC为2.12 mequiv / g。该值高于Nafion 117的值(1