渗透蒸发膜的研制──聚丙烯酸与聚乙烯醇等共混及其缩醛化  

Preparation of Polyvinyl Alcohol/Polyacrylic Acid Pervaporation Membrane Modified by Blending and Acetal Reaction

作　　者：倪秀元[1] 许振良[1] 施亚钧[1] 

机构地区：[1]华东理工大学化学工程研究所

出　　处：《华东理工大学学报（自然科学版）》1994年第6期735-739,共5页Journal of East China University of Science and Technology

基　　金：国家化学工程重点实验室资助项目

摘　　要：以乙醇水溶液为分离对象，研究了聚丙烯酸（ＰＡＡ）与聚酰胺羧酸或聚乙烯醇（ＰＶＡ）共混膜的渗透蒸发分离性能，以及均相、非均相缩醛反应对ＰＶＡ膜分离因素ａ和渗透通量Ｊ的影响。实验发现，戊二醛交联ＰＶＡ膜的ａ提高到４９．５（乙时含水Ｃ＿１＝１０％，温度为５５℃）；增加非均相缩甲醛反应时间，ＰＶＡ／ＰＡＡ共混膜的α先下降而后趋于不变，同时Ｊ存在一最大值。The separation characteristics for water/ethanol mixture of the blended membranes of polyacrylic acid- polyamide acid and polyacrylic acid-polyvinyl alcohol were studied ,and the effects of both homogeneous and heterogeneous acetal reaction on PVA membranesepartion performance were also investigated.According to the experimental data,the separation factor of the PVA membrane crosslinked by glutaraldehyde was up to 49.5(the massconcentration of water was equal to 10%,and the operation temperature was equal to 55℃)。The separation factor of the PVA- PAA blended membrane showed a minimum value at thereaction time of 30 minutes of heterogeneous acetal reaction with formalehyde and almostkept constant,and the permeation flux of this membrane had a peak value.

关 键 词：渗透蒸发 共混 膜分离 聚丙烯酸 聚乙烯醇 

分 类 号：TQ028.8[化学工程]