文献类型：期刊文献

中文题名：金属盐改性PVA膜及其渗透汽化性能

英文题名：Performance of pervaporation of PVA membranes modified by metal salts

作者：徐林[1];侯春龙[1];刘月胜[1];杨虎[1];许振良[1]

机构：[1]化学工程联合国家重点实验室,华东理工大学化学工程研究所膜科学与工程研发中心,上海200237

年份：2016

卷号：36

期号：2

起止页码：60

中文期刊名：膜科学与技术

外文期刊名：Membrane Science and Technology

收录：CSTPCD;;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家自然科学基金项目(20076009、21176067、21276075和21406060)

语种：中文

中文关键词：聚乙烯醇;金属盐;乙酸乙酯;渗透气化

外文关键词：PVA;metal salts;ethyl acetate;pervaporation

摘要：以聚乙烯醇(PVA)为原料,在PVA水溶液中添加不同类型的金属盐,制备不同金属盐改性的PVA渗透汽化膜,讨论了金属盐对膜溶胀度、机械性能和渗透汽化能力的影响.实验结果表明,加入金属盐(除镁盐)后,改性膜的溶胀度降低,膜的稳定性提高;添加金属盐均能提高膜分离乙酸乙酯溶液的渗透汽化通量.通过改性膜综合性能的比较,LiCl改性膜性能更为优异.随着LiCl含量的增加,膜通量增大.当LiCl添加量为0.1mol时,渗透通量J=110g/(m^2·h),分离因子α=1700;添加0.3mol LiCl时,J=536g/(m^2·h),α=1000.
Using PVA as raw material,polyvinyl alcohol(PVA)membranes modified by metal salts were prepared by adding metal salts into PVA solutions.The effects of metal salts on the swelling degree,mechanical properties and pervaporation performance of the membranes were studied.The results revealed that the swelling degree of modified membranes decreased and the stability enhanced after adding metal salts except magnesium salts.And in separating the solution of ethyl acetate the fluxes of membranes were increased after adding metal salts.Considering the comprehensive performance of modified membranes,membranes modified by lithium chloride were more excellent.The flux increased with the increase of LiCl content,when LiCl content was 0.1mol,the flux J=110g/(m^2·h),the separation factorα=1700;LiCl content was 0.3mol,J=536g/(m^2·h),α=1000.