磺化聚芳醚酮砜/聚芳醚砜噁二唑复合型质子交换膜的制备与性能

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.

Preparation and Performance of Sulfonated Poly(aryl ether ketone sulfone)/Poly(aryl ether sulfone oxadiazole) Composite Proton-exchange Membranes†

A serious of sulfonated poly(aryl ether ketone sulfone)/poly(aryl ether sulfone oxadiazole) composite 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(3.9×10^-7—6.6×10^-7 cm²/s), which were better than 8.7×10^-7 cm²/s of SPAEKS. Although the composite membranes displayed lower proton conductivities 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.