Abstract: Polysulfone ultrafiltration membrane was prepared by the method of immersion-precipitation phase inversion. Casting solution consists of PSf and additive. Polyvinylpyrrolidone (PVP-K30，PVP-K90)，polyethylene glycol (PEG-6000，PEG-20000)，zinc chloride (ZnCl2) and propionic acid (PA) were used as additives. The concentration of the additive was 10%. The sectional structure of the polysulfone membrane with PVP-K90 is sponge-like. The membranes with other additives are like finger-like. The pure water flux of the polysulfone membrane with PVP-K30 was maximum and the rejection of BSA of the polysulfone membrane with PA was maximum. The equilibrium water content (EWC) and porosity of polysulfone membranes with polymeric additives were higher than polysulfone membranes with small molecule additives. Polysulfone membranes with polymeric additives had more closed-cell structure.

Key words: PSf membrane, cross-sectiion image, pure water influx, rejection, PSf membrane, cross-sectiion image, pure water flux, rejection

摘要： 通过浸没沉淀相转化法制备聚砜超滤膜，分别以高分子聚乙烯基吡咯烷酮（PVP-K30，PVP-K90）、聚乙二醇（PEG-6000，PEG-20000）和小分子氯化锌（ZnCl2）、丙酸（AS）6种物质作为制备聚砜超滤膜的添加剂，含量均为10%。并对聚砜超滤膜的断面结构、纯水通量、牛血清蛋白（BSA）截留率、孔隙率及平衡水含量等5项性能进行了测试及表征。由断面结构可以看出，PVP-K90作为添加剂时，制得膜的断面完全为海绵状结构，其它添加剂制得膜断面中均有指状孔结构；PVP-K30作为添加剂时制得膜的纯水通量最大；丙酸作为添加剂制得膜的BSA截留率最高；聚乙烯基吡咯烷酮（PVP）和聚乙二醇（PEG）制得膜的平衡水含量及总孔隙率均较高，但闭孔也较多。

关键词: 聚砜膜, 断面结构, 水通量, 截留率, 聚砜膜, 断面结构, 水通量, 截留率