磷酸化EVOH/DGEBA/PPA交联质子交换膜的研究  

Research on Phosphorylated EVOH/DGEBA/PPA Cross-linked Proton Exchange Membranes

作　　者：王姝珊[1] 翟良芳[1] 刘剑洪[2] 李翠华[2] 管蓉[1] 

机构地区：[1]湖北大学化学化工学院,武汉430062 [2]深圳大学化学与化工学院,深圳518060

出　　处：《高分子通报》2013年第9期177-183,共7页Polymer Bulletin

基　　金：深圳市功能高分子重点实验室开放基金资助项目FP20130001

摘　　要：为了研究适用于高温低湿环境下的燃料电池质子交换膜,本文采用了一种新型交联试剂双酚A二缩水甘油醚型环氧树脂(DGEBA),按照一定配比对乙烯-乙烯醇的嵌段共聚物(EVOH)进行适度交联,引入多聚磷酸(PPA)对交联膜进行磷酸化,制备了磷酸化EVOH/DGEBA/PPA交联膜。通过傅里叶红外(FTIR)、X射线衍射(XRD)和质子电导率等测试对膜的性能进行了表征。实验结果表明:所制备的膜成功地进行了交联反应和磷酸化反应;交联反应使膜的热稳定性和氧化稳定性得到改善;随磷酸化时间的增加,膜的离子交换容量值和电导率增加,但氧化稳定性有所降低。在相对湿度为60%时,膜的质子电导率要高于Nafion膜,所研制的膜有望在高温低湿环境下的质子交换膜燃料电池中使用。In order to investigate the proton exchange membranes suitable for high temperature and low moisture, a new type of cross-linking reagent diglycidyl ether of bisphenol-A was introduced to react with ethylene-vinyl alcohol copolymer at certain mol ratio, then the phosphorylated EVOH/DGEBA/PPA cross-linked membranes were obtained by phosphorylating EVOH/DGEBA cross-linked membranes with polyphosphoric acid. FTIR, XRD and proton conductivity have been used to characterize the performance of membranes. The experimental results showed that the membranes have been cross-linked and phosphorylated successfully the thermal stability and oxidation stability of membranes were improved by cross-linking reaction the IEC value and proton conductivity of membranes increased with increasing the phosphorylation time, however, the oxidation stability decreased. The proton conductivity of membranes was higher than that of Nafion at the relative humidity of 60%, so the prepared membrane is expected to be used in proton exchange membrane fuel cell at high temperature and low humidity atmosphere.

关 键 词：双酚A二缩水甘油醚型环氧树脂 乙烯-乙烯醇共聚物 交联 磷酸化 质子交换膜 

分 类 号：TM911.4[电气工程—电力电子与电力传动]