静电层层自组装改性SPPESK/PWA质子交换膜

doi:10.16085/j.issn.1000-6613.2015.12.024

化工进展 ›› 2015, Vol. 34 ›› Issue (12): 4285-4289,4294.DOI: 10.16085/j.issn.1000-6613.2015.12.024

静电层层自组装改性SPPESK/PWA质子交换膜

孙园园, 吴雪梅, 甄栋兴, 张世凯, 胡蒙蒙, 贺高红

大连理工大学精细化工国家重点实验室, 膜科学与技术研究开发中心, 辽宁大连 116024

收稿日期:2015-03-23 修回日期:2015-04-09 出版日期:2015-12-05 发布日期:2015-12-05
通讯作者: 贺高红,教授,从事膜科学与技术、燃料电池领域的研究。E-mailhgaohong@dlut.edu.cn。
作者简介:孙园园(1990—),女,硕士研究生,从事燃料电池用质子交换膜的研究。
基金资助:
国家杰出青年科学基金(21125628)、国家自然科学基金(21176044)及大连理工大学重大项目培育科研专题项目(DUT13ZD204)

Modification of SPPESK/PWA proton exchange membrane by layer-by-layer self-assembly

SUN Yuanyuan, WU Xuemei, ZHEN Dongxing, ZHANG Shikai, HU Mengmeng, HE Gaohong

State Key Laboratory of Fine Chemicals, R&D Center of Membrane Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning, China

Received:2015-03-23 Revised:2015-04-09 Online:2015-12-05 Published:2015-12-05

摘要/Abstract

摘要： 运用直接掺杂法制备的磺化聚芳醚砜酮/磷钨酸(SPPESK/PWA)复合质子交换膜存在PWA流失严重的问题,影响了膜的正常使用。为了解决这一问题,以壳聚糖(CS)和PWA为聚阴阳离子电解质对,对复合膜进行静电层层(LBL)自组装改性研究,对膜的吸水率、溶胀度、质子传导率等性能进行了表征,并测试了膜中PWA的稳定性。经测定,SPPESK/PWA/(CS/PWA)₂的质子传导率达到154mS/cm(80℃),高于相应的SPPESK膜(118mS/cm)及SPPESK/PWA膜(147mS/cm);SPPESK/PWA/(CS/PWA)₄在80℃水中浸泡30天后,膜的质量损失率由18.45%降为11.81%,电导率损失率由32.20%降为16.77%。结果表明,该方法不仅提高了复合膜的质子传导率,并且有效抑制了PWA的流失。

关键词: 层层自组装, 质子交换膜, 磺化聚芳醚砜酮, 壳聚糖, 磷钨酸

Abstract: The sulfonated poly(phthalazinone ether sulfone ketone)/phosphotungstic acid (SPPESK/ PWA) composite membrane prepared by the direct doping method has a problem of serious outflow,which affects the application of the membrane in fuel cells. To solve that,electrostatic layer-by-layer (LBL) self-assembly was employed to modify the SPPESK/PWA membrane using chitosan (CS) as the polycation and PWA as the polyanion. Properties such as water uptake,swelling ratio and proton conductivity were measured,and stability of PWA was analyzed meantime. It is shown that conductivity of the SPPESK/PWA/(CS/PWA)₂ membrane reaches 154mS/cm (80℃),higher than that of the SPPESK membrane (118mS/cm) and the SPPESK/PWA membrane (147mS/cm). In addition,for the SPPESK/PWA/(CS/PWA)₄ membrane,after soaked in 80℃ water for 30 days,weight loss ratio decreases from 18.45% to 11.81%,and conductivity loss ratio decreases from 32.20% to 16.77%. The results indicate that the LBL self-assembly method improves the proton conductivity and restricts the PWA loss.

Key words: layer-by-layer self-assembly, proton exchange membrane, sulfonated poly(phthalazinone ether sulfone ketone), chitosan, phosphotungstic acid

中图分类号:

TM911.48

孙园园, 吴雪梅, 甄栋兴, 张世凯, 胡蒙蒙, 贺高红. 静电层层自组装改性SPPESK/PWA质子交换膜[J]. 化工进展, 2015, 34(12): 4285-4289,4294.

SUN Yuanyuan, WU Xuemei, ZHEN Dongxing, ZHANG Shikai, HU Mengmeng, HE Gaohong. Modification of SPPESK/PWA proton exchange membrane by layer-by-layer self-assembly[J]. Chemical Industry and Engineering Progree, 2015, 34(12): 4285-4289,4294.

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静电层层自组装改性SPPESK/PWA质子交换膜

Modification of SPPESK/PWA proton exchange membrane by layer-by-layer self-assembly

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