Preparation and characterization of proton exchange membranes from polystyrene grafted poly(vinylidene fluoride) powder  

作　　者：LI Linfan YU Yang DENG Bo YU Ming XIE Leidong LI Jingye 

机构地区：[1]shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Nuclear Science and Techniques》2011年第3期160-164,共5页核技术（英文）

基　　金：Supported by National Natural Science Foundation of China(No.10875164 and No.10805070);Knowledge Innovation Program of the Chinese Academy of Sciences

摘　　要：Proton exchange membranes(PEMs)were prepared in three steps:grafting of polystyrene onto PVDF powder using pre-irradiation graft polymerization technique,processing the grafted PVDF powder into membranes of around 50-μm thickness,and sulfonating them with cholorosulfonic acid to form poly(vinylidene fluoride)-g-poly(styrene sulfonic acid)membranes.Kinetics of the graft polymerization was studied.The existing of polystyrene side-chains in the grafted PVDF powders,and PSSA groups in PEMs,were proved by FT-IR.Properties of the PEMs,i.e.the ion exchange capacity,water uptake,proton conductivity,thermal property and oxidative stability, were characterized.Dependence of properties on the degree of grafting was investigated,too.Proton exchange membranes （PEMs） were prepared in three steps： grafting of polystyrene onto PVDF powder using pre-irradiation graft polymerization technique, processing the grafted PVDF powder into membranes of around 50-~tm thickness, and sulfonating them with cholorosulfonic acid to form poly（vinylidene fluoride）-g-poly（styrene sulfonic acid） membranes. Kinetics of the graft polymerization was studied. The existing of polystyrene side-chains in the grafted PVDF powders, and PSSA groups in PEMs, were proved by FT-IR. Properties of the PEMs, i.e. the ion exchange capacity, water uptake, proton conductivity, thermal property and oxidative stability were characterized. Dependence of properties on the degree of grafting was investigated, too.

关 键 词：质子交换膜 预辐照接枝 聚苯乙烯 偏二氟乙烯 表征 聚合反应动力学 聚偏氟乙烯 制备 

分 类 号：TQ028.8[化学工程] TM911.4[电气工程—电力电子与电力传动]