为了降低质子交换膜(PEM)的甲醇渗透系数和改善PEM在中高温(80~120℃)时的质子传导率,以自制的磺化度( SD)为100%的磺化聚芳醚酮砜( SPAEKS)与聚芳醚砜噁二唑( PAESO)为原料,采用溶液共混法制备了SPAEKS/PAESO复合膜,并用傅里叶变换红外光谱( FTIR)和热重分析( TGA)对其进行了表征.结果表明,该复合膜具有较好的化学稳定性和热稳定性.扫描电子显微镜( SEM)照片显示,复合膜具有较好的致密结构,其甲醇渗透系数为3.9×10-7~6.6×10-7 cm2/s,低于SPAEKS的8.7×10-7 cm2/s.在100℃时复合膜的质子传导率达到0.074 S/cm,高于SPAEKS膜的0.066 S/cm.%A serious of sulfonated poly( aryl ether ketone sulfone)/poly( aryl ether sulfone oxadiazole) com-posite membranes were prepared by solution blended method, to improve the performance of membranes for using in the condition of high-middle temperature ( 80-120 ℃) . These prepared membranes were characte-rized by FTIR spectroscopy and thermo gravimetric analysis( TGA) , and exhibited high thermal stability and good chemical stability. The SEM images showed that the composite membranes had compact structure. The composite membranes had low methanol diffusion coefficient properties(3. 9í10-7-6. 6í10-7 cm2/s), which were better than 8. 7í10-7 cm2/s of SPAEKS. Although the composite membranes displayed lower proton con-ductivities than the pure copolymer membranes at room temperature, the presence of nitrogen heterocyclic led to an improvement in high-temperature conductivity. The proton conductivity of SPAEKS/PAESO was found to be 0. 074 S/cm at 100 ℃, which was higher than 0. 066 S/cm of SPAEKS.
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