采用共混制备了一系列磺化含酚酞侧基聚芳醚酮(SPEK-C)/氧化石墨烯(GO)复合质子交换膜,系统地研究了 GO 含量对复合膜性能的影响.结果表明,GO 含量对膜的离子交换容量、稳定性、质子电导率和甲醇渗透率等有重要影响.复合膜质子电导率随 GO 含量增加而提高,GO 含量为 2%和 5%的复合膜在 80℃下质子电导率均在 10?1 S·cm?1 以上.80℃下,GO 含量为 5%的复合膜甲醇渗透率为 6.69×10?7 cm2·s?1,低于同温度下复合前 SPEK-C 膜 1 个数量级.复合后膜的化学稳定性增强,离子交换容量和含水率均有提高,相对选择性明显增大,最高达 SPEK-C 的 18.2 倍.%A series of sulfonated phenolphthalein side poly (aryl ether ketone) (SPEK-C)/graphene oxide (GO) hybrid composite proton exchange membranes was fabricated. The effect of GO as a filler blending with SPEK-C was investigated systematically. The results indicated that GO content in the membrane had a great influence on ionic exchange capacity, stability, proton conductivity and methanol permeability. The proton conductivity was enhanced with increasing GO content. Moreover, the proton conductivity of the composite membranes with 2%and 5% GO was all above 10?1 S·cm?1 at 30℃. The composite membrane containing 5% GO exhibited methanol permeability of 6.7×10?8 cm2·s?1 at 30℃, which was one order of magnitude lower than that of SPEK-C membrane. The ionic exchange capacity, stability and water uptake were enhanced, and the relative selectivity reached up to 18.2 times higher than that of the SPEK-C membrane.
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