膜科学与技术

磺化聚醚醚酮/多壁碳纳米管复合质子交换膜的制备与性能

作者：秦瑞红，孟晓宇，魏鹏，刘旭，蔡子青，周琼

单位：中国石油大学（北京）理学院材料科学与工程系，北京，102200

关键词：磺化聚醚醚酮，多壁碳纳米管，质子交换膜，直接甲醇燃料电池

出版年,卷(期):页码： 2015,35(4):29-34

摘要：

合成了表面接枝磺酸基团的改性多壁碳纳米管（S-MWNTs），通过溶液共混法制备了用于直接甲醇燃料电池的磺化聚醚醚酮（SPEEK）/S-MWNTs复合膜。扫描电镜显示，S-MWNTs在掺杂量比较少时，能够在SPEEK基体中均匀分散；热重分析证明，复合膜具有优异的热稳定性。当掺杂量为1wt%时，复合膜的机械性能，尺寸稳定性及电导率均提高，这有效解决了纯SPEEK膜中质子电导率与机械性能、尺寸稳定性等相矛盾的问题。
关键词：

modified multi-walled carbon nanotubes (S-MWNTs) whose surfaces were grafted with sulfonic acid groups were synthesized, sulfonatedpoly(ether ether ketone)/S-MWNTs composite membranes for application in the direct methanol fuel cell(DMFC) were prepared by solution blending technique. Scanning electron microscopy(SEM) showed S-MWNTs were uniformly dispersed in the composite membrane when the doping content was small. The excellent thermal resistance were proved by thermal gravimetric analysis(TGA). When the doping content was 1 wt%, the mechanical properties, dimensional stability and proton conductivity were all improved, which effectively solves contradictory problems of pureSPEEKmembranebetween proton conductivity and the other properties of proton exchange membrane such as mechanical properties, dimensional stability, thermal resistance.
Key words:

秦瑞红（1989－），女，河南商丘人，硕士研究生，从事高分子材料改性与高性能化方面研究

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