将柔性链聚乙烯醇(PVA)分别与天然高分子海藻酸钠(SA)、壳聚糖(CS)共混,以增强其柔韧性及双极膜界面层的相容性.分别以FeCl3和戊二醛为交联剂,对PVA/SA和PVA/CS进行改性.制备了PVA-SA/CS双极膜,其溶胀度为25%~80%.用红外光谱和扫描电子显微镜对膜成分与形貌进行了表征.结果表明.PVA-SA/CS双极膜致密,表面均匀,未见孔隙.阴离子交换层(GA-PVA/CS)中含有-N=c官能团.阳离子交换层(Fe-PVA/sA)中含有-COO-官能团.以PVA-SA/CS双极膜为电解槽的隔膜,间接电氧化羟基新戊醛为羟基新戊酸,槽电压稳定,在电流密度28×10-3A/cm2下,最大电流效率为68.9%,平均电流效率为52.2%.
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