添加剂对聚砜膜结构和性能的影响  

Effects of additives on characterization and performance of polysulfone ultrafiltration membrane

作　　者：雷晓慧[1] 丁雪佳[1] 何金迎[1] 王林生[1] 苏磊静[1] 吴勇振 魏永飞 王国胜 

机构地区：[1]北京化工大学北京市新型高分子材料制备与加工重点实验室,北京100029 [2]新乡市驼人医疗器械有限公司,河南长垣453400

出　　处：《化工进展》2013年第8期1866-1869,1886,共5页Chemical Industry and Engineering Progress

基　　金：国家科技支撑计划项目(2012BAI22B07)

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。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.

关 键 词：聚砜膜 断面结构 水通量 截留率 

分 类 号：TQ028.8[化学工程]