聚乙二醇对聚醚砜超滤膜的结构和亲水性能的影响  

Influence of Polyethylene Glycol on Structure and Hydrophilic Performance of Polyether Sulfone Ultrafiltration Membrane

作　　者：董曲 钱建华[1] 秦刘伟[1] 曹原[1] 曹晨[1] 

机构地区：[1]浙江理工大学材料与纺织学院,杭州310018

出　　处：《现代纺织技术》2017年第2期10-16,共7页Advanced Textile Technology

基　　金：浙江理工大学纺织科学与工程优秀青年人才基金项目(2013YXQN09)

摘　　要：聚醚砜(PES)是一种制备超滤膜的常用材料,为改善其亲水性,文章在以聚醚砜为原料,二甲基乙酰胺(DMAc)为溶剂,聚乙烯吡咯烷酮(PVP)为添加剂,制备成铸膜液的基础上添加不同分子量和含量的聚乙二醇(PEG)。应用扫描电子显微镜观察了膜的微观结构,测定了平板膜的接触角、截留率和水通量等性能。结果表明:随PEG的分子量和质量分数的增大,PES膜的水通量显著增加,亲水性能大幅提高,PEG的加入使PES膜结构产生更加致密且连通性更好的指状孔结构。当PEG分子量为6 000,PEG质量分数为4%时,制备得到的PES平板膜具有最佳的亲水性能。Polyether sulfone （PES） is a common material for preparing ultrafiltration membrane. To improve its hydrophilic performance, this paper adds polyethylene glycol （PEG） with different molecular weight and content on the basis of preparing membrane casting solution with polyether sulfone as raw material, dimethylacetamide （DAMc） as solvent and polyvinylpyrrolidone （PVP） as additive, observes microstructure of membrane with scanning electron microscope and measures contact angle, reject rate and water flux of flat sheet membrane. The result shows that water flux of PES membrane greatly increases and hydrophilie performance greatly improves with the increase of molecular weight and mass fraction of PEG; the addition of PEG makes PEG membrane have a more compact fingerlike pore structure with better connectivity. When PEG molecular weight is 6000 and mass fraction is 4%, PEG flat sheet membrane prepared has the best hydrophilie performance.

关 键 词：聚醚砜平板超滤膜 聚乙二醇 分子量 质量分数 亲水改性 

分 类 号：TQ028.8[化学工程]