利用非溶剂致相转化法(NIPS)制备了PVC-P(VC-VAC)-MBS平板和中空纤维超滤膜,讨论了氯乙烯-醋酸乙烯共聚物[P(VC-VAC)]的含量对膜机械性能、亲水性、纯水通量及截留率等性能的影响.同时,通过添加抗冲击改性剂甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物(MBS),考察了MBS对PVC平板超滤膜机械性能的影响.实验结果表明,当铸膜液中P(VC-VAC)的质量分数为4％时,亲水性最好,纯水通量可由42.5 L/(m2·h)增大到155 L/(m2·h);同时,膜的机械性能明显增强,P(VC-VAC)和MBS树脂可以有效地改善PVC超滤膜的亲水性和机械性能,是优良的PVC膜共混改性材料.
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