摘要
通过化学反应将不同比例聚乙烯醇(PVAL)引入到咪唑化聚苯醚体系中,采用溶液浇注法制备相应的阴离子交换膜。对复合膜的红外和X射线衍射表征发现,PVAL是以化学键合的方式引入膜中且PVAL的引入对复合膜中硅烷的水解交联几乎没有影响。观察复合膜的微观形貌发现膜断面的微观结构都十分致密,无孔洞或相分离的现象。热稳定性分析结果表明,复合膜有较好的热稳定性。离子电导率测试表明,该膜离子电导率随着PVAL含量的增加而有一定的减小,随着温度升高而增大。在相同碱性环境下,PVAL改性后阴离子交换膜离子电导率的下降率可减少6%,表明其耐碱性能得到提升,可以满足高温高碱环境下燃料电池的运行要求。
Different proportions of polyvinyl alcohol （PVAL） were chemically bonded to imidazole polyphenylene oxide system by chemical reaction,and the corresponding anion exchange membrane was prepared by a solution casting method. FTIR and XRD measurements showed that PVAL successfully cross-linked in the molecular chain in the form of chemical bonds,and the addition of PVAL had no effect on the formation of Si-O-Si. SEM analysis showed that the modified membrane had a uniform microstructure. The TG–DSC curve displayed that the thermal stability of the membrane was significantly improved. The ionic conductivity test showed that the ionic conductivity of the membrane decreased with the increasing of PVAL content and increased with the increasing of temperature. In the same environment,the reduction rate of the ionic conductivity of the anion exchange membrane after PVAL modification could be reduced by 6%, which indicated that the alkaline resistance performance was improved,and it could meet the operating requirements of alkaline fuel cells under high temperature and high alkaline conditions.
作者
金怀洋
程向泽
陈继钦
朱希
沈春晖
Jin Huaiyang;Cheng Xiangze;Chen Jiqin;Zhu Xi;Shen Chunhui(School of Material Science and Engineering,Wuhan University of Technology,Wuhan 430070,Chin)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2018年第7期1-6,共6页
Engineering Plastics Application
关键词
聚乙烯醇
咪唑化
聚苯醚
阴离子交换膜
polyvinyl alcohol
imidazolium
polyphenylene oxide
anion exchange membrane
作者简介
通讯作者：沈春晖,博士,教授,主要研究方向为燃料电池关键材料及精细高分子合成与性能E-mail：shenchunhui@whut.edu.cn
