静电层层自组装改性SPPESK/PWA质子交换膜
Release Time:2019-03-10 Hits:
Indexed by: Journal Article
Date of Publication: 2015-12-05
Journal: 化工进展
Included Journals: CSCD、ISTIC、PKU
Volume: 34
Issue: 12
Page Number: 4285-4289,4294
ISSN: 1000-6613
Key Words: 层层自组装;质子交换膜;磺化聚芳醚砜酮;壳聚糖;磷钨酸
Abstract: 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.