PTFE中空纤维膜微孔结构调控技术研究进展  

Progresses in the controlling of microporous structure on the preparation of polytetrafluoroethylene hollow fiber membrane

作　　者：刘国昌[1,2] 高从堦[1] 郭春刚[2] 李晓明[2] 陈江荣[2] 刘铮[2] 吕经烈[2] LIU Guochang GAO Congjie GUO Chungang LI Xiaoming CHEN Jiangrong LIU Zheng LV Jinglie(College of Chemistry and 2. The Institute of Seawater Chemical Engineering, Ocean University of China, Qindao 266100,China Desalination and Multipurpose Utilization, State Oceanic Administration, Tianjin 300192, China)

机构地区：[1]中国海洋大学化学化工学院,山东青岛266100 [2]国家海洋局天津海水淡化与综合利用研究所,天津300192

出　　处：《功能材料》2016年第B06期38-48,共11页Journal of Functional Materials

基　　金：国家海洋局青年基金重点项目(2013502);中央级公益性科研院所基本科研业务费专项资金项目(2012-G8;2013-T1;2013-T13);2015年度海洋公益性行业科研专项经费项目(201505006);海洋经济创新发展区域示范项目(CXSF2014-34-C)

摘　　要：从原料、工艺和后处理三方面,综述了近年来基于推压成型-拉伸法制备聚四氟乙烯(PTFE)中空纤维膜微孔结构调控技术的研究进展。认为树脂原料是基础,压缩比决定膜内外径,分子量与膜微孔结构关系密切;工艺调节是最基本、最主要的手段,预成型、推压成型、热处理、拉伸致孔和烧结定型各工序及其参数能够直接影响膜微孔结构;后处理是有益补充,涂覆、物理气相沉积和包缠能够对膜表层微孔结构做进一步修饰,达到减小膜分离层孔径并最大限度保持膜的高孔隙率的目的。最后,对PTFE中空纤维膜微孔结构调控技术的发展趋势进行分析展望。The successful process for preparation of PTFE hollow fiber membrane is known as paste extrusion-stretching.However,the process does not generally provide a membrane having fine pores size and high porosi-ty.The structure control,therefore,has been the main issue among researchers and manufacturers.This article provides an overview of recent progress on microporous structure control related to selection of PTFE fine pow-der,mechanical operations and post treatment.The effects of PTFE fine powder species,reduction ratio and molecular weight on the preforming were introduced in detail.Subsequently,a series of mechanical operations and process parameters were analyzed as suitable for the preparation of PTFE hollow fiber membrane and chan-ges of microporous structure.About the post treatment process,the surface coating,physical vapor deposition and spiral wrapping techniques would bring a host of salutary effects.It was pointed out the ingredients of PT-FE fine powder wasfoundation for getting microporous membrane,the process of mechanical operations was most directly effective approach,and post treatment was the beneficial supplement.Finally,the tendency about microporous structure controlling technology were suggested and forecasted.

关 键 词：膨体聚四氟乙烯 中空纤维膜 微孔结构 推压成型 拉伸致孔 后处理 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业] TQ320.66