质子交换膜用部分含氟磺化聚芳醚的合成与性能研究

通过直接磺化的方法,合成了一种部分含氟的磺化聚芳醚.由于特殊单体结构的设计,在聚合物主链上引入甲基取代基,对聚合物主链进行保护.用氯磺酸直接磺化方法在聚芳醚侧基上引入磺酸功能基,实现了聚合物磺化结构的可控定位合成,得到了稳定性较好的磺化聚芳醚.用溶液浇膜法制备了质子交换膜,研究了膜的各种性能.这种膜具有较高的导电性、吸水性和好的抗水解性、热稳定性.由于特殊结构的设计和部分氟的引入,这种膜的抗氧化性有显著的提高.

Synthesis and properties of partially-fluorinated sulfonated poly (arylene ether) for proton exchange membrane

Partially-fluorinated sulfonated poly(arylene ether) as proton exchange membrane for fuel cell appliaction was successfully synthesized.The sulfonic acid function was only attached at the para positions on the pendant phenyl rings due to the novel sulfonated poly(arylene ether) structures designed.The sulfonated polymers were very soluble in common organic solvents,such as dimethyl sulfoxide,N,N'-dimethylacetamide,and can be readily cast into tough and smooth films from solutions.Thermal stability,water uptake,proton conductivity and hydrolytic stability and oxidative stability were studied.The membrane showed excellent oxidative stability and can be potentially used as the proton-exchange membranes for fuel-cells.