以COCl2为添加剂、N,N-二甲基乙酰胺为溶剂,采用湿法相转化工艺制备了聚丙烯腈超滤膜.对比研究了凝胶过程中磁场作用对凝胶浴液电导率、钴离子浓度的影响,并采用扫描电子显微镜、原子力显微镜观察了膜的断面与表面结构,通过超滤实验测定了膜的性能.实验结果表明:凝胶过程中的磁场作用能明显提高成膜过程中COCl2的传质速率;磁场作用使得膜断面的大孔穴数目明显减少、膜的表面粗糙度降低和膜的孔径分布变窄;磁场作用对膜的渗透通量和耐污染性的影响不大,但能提高膜的截留率.
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