磺化聚苯醚/聚醚酰亚胺共混质子交换膜的制备与性能

以磺化聚苯醚(SPPO)和聚醚酰亚胺(PEI)为原料,采用溶液共混法制备了SPPO/PEI共混质子交换膜,并经扫描电镜(SEM)、热重分析、拉伸测试等对膜的结构和性能进行了表征。结果表明,共混膜较纯SPPO膜具有更高的热稳定性、力学性能和尺寸稳定性;SPPO与PEI之间的强烈氢键相互作用使两组分之间并未发生明显的相分离。PEI的引入虽使得共混膜的质子传导率有所下降,但对于PEI含量在40%以下的共混膜,其质子传导率仍维持在约10-2S/cm的数量级水平,能满足质子交换膜的要求。

Preparation and Properties of Sulfonated Poly(Phenylene Oxide)/Poly(Ether Imide) Blend Proton Exchange Membranes

Sulfonated poly(phenylene oxide) (SPPO)/poly(ether imide) (PEI) blend membranes for application in proton exchange membrane fuel cells (PEMFCs) were uccessfully prepared by solution blend technique.The structure and performance of the obtained membranes were characterized using scanning electron microscope (SEM),thermogravimetry analysis(TGA) and tensile test.The results show that the blend membranes have higher thermal stability,mechanical strength and dimensional stability.The two polymers exhibit very fine microstructures without evident phase separation due to the strong hydrogen bond interactions between SPPO and PEI.Although the proton conductivity of the blend membrane decreases to some extent due to the blend of PEI,the SPPO/PEI (PEI content below 40%) membranes still exhibit adequate conductivity (about 10-2 S/cm) for application as proton exchange membranes.