The Dissolution of Nafion115 and the Measurement on the Performance of the Recast Membrane

Xu Hongfeng
(Department of Environment Science and Engineering, Dalian Railway Institute, Dalian 116028)
Xing Yiming, Shao Zhigang, Wang Xin
(Department of Chemical Engineering Hong Kong University of Science &Technology, Hong Kong China)

Abstract Perfluorinated resin solution is useful in proton exchange membrane fuel cell. At the temperature of boiling point of dimethyl sulfoxide, and protected with N₂, the proton exchange membrane (Nafion115) was dissolved in dimethyl sulfoxide, and a kind of membrane solution was obtained. With this solution, a recast membrane was prepared. The exchange capacity, water content, conductivity and structure of the recast membrane were measured. The results show that the properties of the recast membrane are as good as those of its mother membrane. It reveals that such perfluorinated membrane can be reuse.
Key words Nafion, Proton exchange membrane, Solid polymer electrolyte, Dimethyl sulfoxide

Nafion115膜的溶解及其再铸膜性能测定

徐洪峰
(大连铁道学院环境科学与工程系 大连 116028)
邢怡铭  邵志刚  王 昕
(香港科技大学化学工程系 香港 九龙清水湾)

摘要 利用二甲基亚砜将质子交换膜燃料电池用过的Nafion115膜在二甲基亚砜沸点温度，常压下溶解，得到了含Nafion 树脂为2%左右的溶液，并在170° C条件下再铸成膜。利用XRD、交流阻抗和燃料电池等对膜的性能进行了评价和分析。结果表明，再铸膜的分子结构、电阻、交换容量、吸水量以及伏-安性能均与相同厚度的Nafion115接近。
关键词 Nafion 质子交换膜 固体聚合物电解质 二甲基亚砜