基于国内尚没有市售的良好双极膜,本研究以氯甲基化聚砜和磺化聚苯醚作为双极膜的阴阳膜层,在双极膜中间界面层固定络合金属作为催化剂,分别利用SnSO4、CrCl3、NiSO4作为催化荆制得3种双极膜,并与不添加任何催化剂制得的双极膜进行了比较.实验表明,络合金属对双极膜水解离有很好的催化作用,当中问界面层含有络合金属催化剂时,双极膜的水解离电势大大降低,并得到3种络合金属的催化活性为:Cr3+>Ni2+>Sn2+;过多催化剂用量会使双极膜的膜电阻增加;络合金属催化剂对双极膜的选择透过度影响不大,可以忽略;双极膜中间界面层中的络合金属催化剂与阴阳膜面的附着力不强,在酸碱环境中有些出现脱落或溶解.
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