论文部分内容阅读
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 membranes were prepared by immersion-precipitation phase inversion method. Polyvinylpyrrolidone (PVP-K30, PVP-K90), polyethylene glycol (PEG-6000, PEG-20000) and small molecule zinc chloride (ZnCl2) and propionic acid (AS) were used as additives in the preparation of polysulfone ultrafiltration membrane, both of which content was 10%. Five properties of polysulfone ultrafiltration membrane such as cross-sectional structure, pure water flux, bovine serum albumin (BSA) retention rate, porosity and equilibrium water content were tested and characterized. As can be seen from the cross-sectional structure, when the PVP-K90 as an additive, the cross-section of the membrane prepared completely sponge-like structure, the other additives have a finger-like pore structure in the membrane cross section; PVP-K30 as an additive The water flux was the highest. The membrane retention rate of BSA was the highest with propionic acid as additive. The equilibrium water content and total porosity of polyvinylpyrrolidone (PVP) and polyethylene glycol (PEG) More holes.