制备了带有柔性有机侧链的改性碳纳米管（MWCNT-G），并与磺化聚醚醚酮（SPEEK）共混制得复合膜。扫描电镜（SEM）分析结果表明，MWCNT-G比原始MWCNT在SPEEK中分散更均匀。在1%的掺杂比例下对比分析了SPEEK/MWCNT膜及SPEEK/MWCNT-G膜的质子传导率、吸水率、溶胀度、机械性能、化学稳定性、热稳定性等。SPEEK/MWCNT-G膜未降低吸水率却降低了溶胀度，在机械强度及稳定性上均有所提高。SPEEK/MWCNT-G膜质子传递阻力更低，60℃时其质子传导率达0.086 S/cm，是SPEEK/MWCNT膜的1.46倍、SPEEK膜的1.72倍。该方案使MWCNT与SPEEK相容性差的状况得以改善。

A kind of composite membrane is obtained through blending sulfonated polyether ether ketone (SPEEK) and modified carbon nanotube (MWCNT-G) with flexible organic side chains.Analysis results by SEM indicate that MWCNT-G disperses more uniformly in the matrix than native MWCNT.Under a doping ratio of 1%,SPEEK/MWCNT and SPEEK/MWCNT-G composite membranes are compared and analyzed from their proton conductivity,water absorption rate,swelling ratio,mechanical property,strength,chemical stability and thermal stability.SPEEK/MWCNT-G membrane remains unchanged in water absorption rate but has a lower swelling ratio,and exhibits a higher mechanical strength and a higher stability.Moreover,SPEEK/MWCNT-G membrane shows lower proton transfer resistance with a proton conductivity of 0.086 S/cm at 60℃,1.46 times that of SPEEK/MWCNT and 1.72 times that of SPEEK.This scheme improves the compatibility between MWCNT and SPEEK.

杨俊(1994-),男,硕士研究生,研究方向为燃料电池质子交换膜,497762924@qq.com