燃料电池质子交换膜用新型磺化聚芳醚酮的合成和性能表征

报道了一种新型磺化聚芳醚酮材料的合成方法, 通过引入取代基对聚芳醚主链进行保护，用氯磺酸直接磺化方法在聚芳醚酮高分子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酮. 通过核磁共振(NMR)、 热重(TG)和凝胶渗透色谱(GPC)等分析方法对其结构及性能进行了表征. 用溶液浇膜法制备了质子交换膜, 考察了膜的各种性能, 并与商用Nafion膜进行了比较, 其导电性、 热稳定性和吸水性远优于Nafion膜, 抗氧化性、抗水解性和机械强度也达到了较高的指标.

Synthesis and Characterization of Novel Sulfonated Poly(arylene ether ketone) as Proton Exchange Membrane for PEM Fuel Cell Application

A novel sulfonated poly(arylene ether ketone) was successfully synthesized by the sulfonation of the polymer with chlorosulfonic acid.It was confirmed by()~(1)H NMR spectra that the sulfonic acid group had been(introduced) onto the para-position of the pendant phenyl rings.The sulfonated polymers are very soluble in(DMSO) and other organic solvents,and can be readily cast into tough and transparent film.The results show that the membrane derived from the as-prepared polymers exhibits higher water absorption,superior thermal stability and higher proton conductive property than Nafion.The mechanical strength,oxidative stability and hydrolytic stability were tested and compared with those of Nafion.