添加剂聚乙二醇对醋酸纤维素超滤膜结构和性能的影响  

Effects of Polyethylene Glycol on the Structure and Performance of Cellulose Acetate Ultrafiltration Membrane

作　　者：王云[1] 施键水[1] 张胜男[1] 王苑樱[1] 周建成[1] 

机构地区：[1]东南大学化学化工学院,南京211189

出　　处：《精细石油化工进展》2011年第11期43-46,共4页Advances in Fine Petrochemicals

基　　金：江苏省大学生创新计划项目(项目编号:S201130)

摘　　要：以不同相对分子质量的聚乙二醇(PEG)为添加剂,采用浸渍沉淀相转化法制备了醋酸纤维素(CA)超滤膜。通过计算孔隙率判断膜孔径的变化,利用扫描电子显微镜(SEM)对膜表面进行观察,测定超滤膜的纯水通量和截留率,探讨PEG的相对分子质量及用量对CA超滤膜的结构和性能的影响规律。结果表明,PEG-200和PEG-400能有效改善CA超滤膜的孔径和结构,使膜的微孔增多,孔间连通性增强,孔隙率、纯水通量及截留率增加。Cellulose acetate （CA） uhrafillration membranes were prepared using polyethylene glycol （PEG） with different molecular weight as additive by immersion precipitation phase inversion method. By calculating the porosity, observing the surface of the membrane with a scanning electron microscope （SEM） , and determining the permeate flux and the retention rate of the memhrane, the effects of molecular weight and dosage of PEG on the structure and perfommnee of CA uhrafihration membrane were investigated. The results showed that PEG- 200 and PEG- 400 could effectively improve the pore size and structure, increase the number of miero - porous, enhance the connectivity between the pores, and increase the pores, permeate flux, and retention rate of the CA ultrafihration membrane.

关 键 词：醋酸纤维素 超滤膜 聚乙二醇 

分 类 号：TB383.2[一般工业技术—材料科学与工程]