文献类型：期刊文献

中文题名：PTFE-PDMS／PVDF复合膜制备及其渗透汽化性能

英文题名：Preparation and Pervaporation Performances of PTFE-PDMS/PVDF Composite Membranes

作者：孙德[1,2];李冰冰[2];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;[2]长春工业大学化学工程学院,吉林长春130012

年份：2013

卷号：27

期号：3

起止页码：500

中文期刊名：高校化学工程学报

外文期刊名：Journal of Chemical Engineering of Chinese Universities

收录：CSTPCD;;EI(收录号：20132816483898);Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：上海市科技攻关计划(11DZ1205201)

语种：中文

中文关键词：聚四氟乙烯(PTFE);聚二甲基硅氧烷(PDMS);复合膜;渗透汽化;氯仿;水溶液

外文关键词：polytetrafluoroetene; polydimethylsiloxane; composite membrane; pervaporation;chloroform / water mixtures

摘要：制备了以聚偏氟乙烯PVDF超滤膜为底膜的聚四氟乙烯PTFE超细粉体填充聚二甲基硅氧烷PDMS复合膜,并用于氯仿水溶液体系的渗透汽化。采用SEM和接触角分析研究了膜结构及表面性能。研究了PTFE:PDMS质量比、料液流速、料液浓度对渗透汽化性能的影响;采用串联阻力模型分析了渗透汽化氯仿水溶液的传质过程。研究表明,填充PTFE提高了PDMS膜渗透汽化性能;流量大于200 mL min 1时渗透汽化传质阻力主要由膜阻力控制;在流速低于200 mL min 1时,浓差极化产生的氯仿传质边界层阻力最大可达膜阻力的29倍。
A novel PDMS composite membrane filled with micron PTFE powder and using PVDF ultration membrane as the support layer was prepared for the pervaporation of chloroform from water. The structure and the performance of the composite membranes were characterized by scanning electron microscope （SEM） and contact angle. The effects of mass ratio of PTFE and PDMS, feed flow rate and feed concentration on the pervaporation of the composite membrane were studied. The resistance-in-series model was employed to study the transfer characteristics. From experimental data it can be concluded that the addition of PTFE can enhance pervaporation performance of PDMS membrane for the separation of chloroform from water. When the feed flow rate is greater than 200 200mL·min^（-1）, the membrane resistance controls the rate of permeation mass transfer. But when the feed flow rate is below 200 200mL·min^（-1）, the boundary layer resistance resulted from concentration polarization is 29 times as big as the membrane resistance.