碱性直接甲醇燃料电池(ADMFC)具有电极反应速率高,甲醇渗透率低的优点,阴离子交换膜是ADMFC的核心之一.以壳聚糖(CS)和环氧丙基三甲基氯化铵为原料合成季铵化壳聚糖,将其与聚乙烯醇(PVA)共混后制得一系列不同配比的季铵化壳聚糖(QCS)/聚乙烯醇阴离子交换膜,对膜的导电率和甲醇渗透系数进行了测试和分析.结果表明:季铵化壳聚糖与聚乙烯醇有较好的相容性,所制季铵化壳聚糖(QCS)/聚乙烯醇共混膜结构致密均匀,膜的吸水率和溶胀度随季铵化壳聚糖含量增大而减小,离子导电率随季铵化壳聚糖含量增大而提高,80℃时季铵化壳聚糖含量为60%的共混膜导电率最高可达2.5×10-2 S/cm.膜的甲醇渗透系数低于Nafion膜.
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