摘要
本文用非均相光化学氯磷化反应制得了亲水的耐有机溶剂耐酸碱的磺化聚乙烯离子交换膜．膜截面离子基因密度与反应程度有关．该膜对近恒沸组成的二氧六环／水混合液显示出很高的渗透汽化分离系数和透过速率．研究了对离子、离子交换容量、料液浓度和温度对分离性能的影响．通过膜内水合离子形成“水通道”模型讨论了渗透机理．膜内离子基团密度估计及水的表观渗透活化能的大小支持“水通道”的存在．
he sulfonated polyethylene ion - exchange membrane, which is hydrophilic, resistance to solvents and acid-alkali, was prepared by a heterogeneousphotochemical chlorosulfonation of polyethylene film. Pervaporatioh separation ofdioxane/water mixture through this membrane indicates that both flux and separation factor are vary high when the fed is near azeotropic composition. The effectsof counterions, tffeperature, ion-exchange capacity and fed concentration on themparation properties were discussed. The transport of permeants was supposed tobe through a 'water channel' formed from the connection of water cluster in themembrane. The 'water channel' model was supported by the facts that the distance between two ion--groups is shorter than 10A for the membrane with Imeq/g, and the apparent permeation activation enefgy of water in the membraneis near that of in water.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1994年第1期85-91,共7页
Acta Polymerica Sinica
关键词
离子交换膜
膜分离
二氧六环
水
ion-exchange membrane, Pervaporation, Membrane separatinn,Dioxane/ water mixture
