膜科学与技术

全氟阳离子聚合物的合成及膜结构与性能研究

作者：刘训道¹，²，陈晓红¹，王丽³，李虹¹，张永明¹

单位： 1. 上海交通大学化学化工学院，上海 2002401；2.济南大学材料科学与工程学院，济南 250022；3. 山东东岳高分子材料有限公司，淄博 256401

关键词：全氟阳离子聚合物；阴离子交换膜；燃料电池

出版年,卷(期):页码： 2018,38(6):14-21

摘要：

高碱稳定性、高离子电导率的阴离子交换膜的设计与制备是近年来燃料电池领域研究的前沿和热点。本文从分子设计出发，聚合物主链上引入优异稳定性氟原子的基础上，在侧基上进行功能基团的嫁接，合成了吗啉、直链季铵、咪唑型的全氟阳离子聚合物，并将这些聚合物制成相应的阴离子交换膜。结果显示：所得三种阴离子交换膜在80 ℃水中的离子电导率为60.4~80.6 mS/cm之间，其中，直链季铵型阴离子交换膜在80℃下的电导率达到了 80.6 mS/cm。此外，在 80 ℃，8M KOH 水溶液中浸泡 10 天后，离子膜的IEC和电导率分别保留了 92.7 %和 93.2 %，表现出了优异的耐碱性能。

Design and fabrication of high alkaline stability and high ionic conductivity of anion exchange membranes are one of the frontier and hot research areas of fuel cells in recent years. A new research program is proposed, which mainly focuses on molecule synthesis to design and prepare a series of perfluorinated cationic polymers and their AEMs, including linear-quaternary-ammonium, cyclic-morpholine and imidazole-functionalized cationic polymers were successfully synthesized by incorporation of excellent stability fluorine atoms in the polymer main chain and utilization the pendant groups to attach various functional groups. The resulted AEMs displayed the high conductivity of 60.4~80.6 mS/cm at 80 ?C in water. Additionally, linear-quaternary-ammonium membrane exhibited good hydroxide conductivity of 80.6 mS/cm at 80 °C and excellent dimensional stability in water. Moreover, the membrane maintained 92.7% IEC and 93.2% hydroxide conductivity value after immersion in 8 M KOH at 80 °C over ten days and exhibits good alkaline stability.

第一作者简介：刘训道（1986-），男，山东临沂人，博士，主要从事含氟功能膜材料的研究，E-mail：mse_liuxundao@ujn.edu.cn. *通讯作者，E-mail： lh102@sjtu.edu.cn; ymzhang@sjtu.edu.cn

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