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COF改性聚酰亚胺纳米纤维/PFSA复合质子交换膜研究

作者：孟晓宇，鹿钟麒，彭路漫，刘心茹，乔佳怡，丛川波，周琼

单位：中国石油大学（北京）新能源与材料学院油气装备材料失效与腐蚀防护北京市重点实验室，北京 102249

关键词：质子交换膜；聚酰亚胺；全氟磺酸；纳米纤维；燃料电池

DOI号： 10.16159/j.cnki.issn1007-8924.2025.03.004

分类号： TB324； TQ031

出版年,卷(期):页码： 2025,45(3):35-43

摘要：

质子交换膜（PEM）作为燃料电池的核心部件，发挥着重要的作用，得到广泛的研究。聚合物纳米纤维已被广泛用作全氟磺酸质子交换膜的增强材料，以用于改善其因吸水而产生的尺寸稳定性问题。大量的研究表明单层纳米纤维对复合膜溶胀起积极作用，而增加纤维层数对其性能也有显著的影响。本研究在全氟磺酸基体中添加不同层数的在表面吸附了磺酸类共价有机框架COF（TpPa-SO3H）的聚酰亚胺纤维膜（PINF），制备出多层纤维复合膜，并对其性能进行表征和分析。结果表明，双层聚酰亚胺纤维膜增强的D-TpPa-SO3H@PINF/PFSA性能最佳，各项性能得到明显提升。80 ℃电导率为263.7 mS/cm，相比于全氟磺酸纯膜,电导率提高了63.4%，面积溶胀率降低了30.6%，氢渗透系数降低了76.0%，功率密度最大为282.6 mW/cm2。

Proton exchange membrane (PEM) plays an important role as a core component of fuel cells and has been widely studied. Polymer nanofibers have been widely used as reinforcement materials for perfluorosulfonic acid proton exchange membranes for improving their dimensional stability problems due to water absorption. Numerous studies have shown that single-layer nanofibers play a positive role in the swelling of composite membranes, while increasing the number of fiber layers also has a significant effect on their performance. In this paper, multilayer fiber composite membranes were prepared by adding different layers of polyimide fiber membrane (PINF) with sulfonic acid covalent organic framework COF (TpPa-SO3H) adsorbed on the surface in a perfluorosulfonic acid matrix, and their properties were characterized and analyzed. Among them, the double-layer polyimide fiber membrane reinforced D-TpPa-SO3H@PINF/PFSA had the best performance, with a significant improvement in various properties: the conductivity at 80 ℃ was 263.7 mS/cm, which was 63.4% higher than that of the pure membrane of PFSA, with a 30.6% reduction in the area dissolution rate, a 76.0% reduction in hydrogen permeability coefficient, and the maximum power density was 282.6 mW/cm2.

基金项目：

北京市高精尖学科建设项目

作者简介：

孟晓宇（1980-），男，黑龙江齐齐哈尔人，博士研究生，副教授，主要研究方向为高分子材料，E-mail：mengxy@cup.edu.cn

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