PWA-13X-CS复合质子交换膜的性能研究  

Properties of PWA-13X-CS Proton Exchange Membranes

作　　者：伍艳辉[1] 严丹丹[1] 张惠敏[1] 

机构地区：[1]同济大学化学系,上海200092

出　　处：《化学工业与工程》2014年第3期67-71,共5页Chemical Industry and Engineering

摘　　要：用13X分子筛负载无机质子导体-磷钨酸,然后加入壳聚糖(CS)中制备得到PWA-13X-CS复合质子交换膜,对其进行扫描电镜表征,测试了其吸水率、溶胀度、质子导电率、甲醇渗透系数等性质。结果表明PWA-13X-CS复合质子交换膜溶胀度较小,机械性能较好,质子导电率明显高于壳聚糖空白膜,且随温度升高呈上升趋势,其质子导电活化能低于壳聚糖空白膜,甲醇渗透系数小于Nafion117膜。将其与同样添加负载磷钨酸的13X分子筛的聚酰亚胺复合膜及聚乙烯醇复合膜性能进行对比,结果表明PWA-13X-CS复合质子交换膜综合性能较优,在直接甲醇燃料电池中具有较好的应用潜力。PWA-13X-CS composite proton exchange membranes are prepared with chitosan（CS） and phos- photungstic acid（PWA） supported on molecular sieves 13X. The composite membrane structure is analyzed with SEM. Water uptake, swelling degree, proton conductivity and methanol permeability of the composite membrane are measured. The results show that PWA-13X-CS composite membrane has low swelling de- gree, which means it has good mechanical stability. And the proton conductivity is higher than the plain chitosan membrane and it increases with the increasing temperature. The proton conducting activation ener- gy of PWA-13X-CS composite membrane is lower than that of the plain membrane. The methanol permea- bility of the composite membranes is lower than that of Nation 117. Comparing with PI and PVA composite membrane that has the same content of 13X supported PWA, PWA-13X-CS composite membrane has better overall performance and shows better application potential in direct methanol fuel cell.

关 键 词：壳聚糖 复合膜 质子电导率 直接甲醇燃料电池 

分 类 号：O636.1[理学—高分子化学]