PTFE／CaCO3杂化中空纤维膜制备及其界面孔研究  

Study on the preparation of PTFE/CaCO_3 hybrid hollow fiber membrane and the interfacial micro-voids

作　　者：黄庆林[1] 肖长发[1] 胡晓宇[1] 

机构地区：[1]天津工业大学中空纤维膜材料与膜过程省部共建国家重点实验室培育基地,天津工业大学材料科学与工程学院,天津300160

出　　处：《膜科学与技术》2011年第6期46-49,共4页Membrane Science and Technology

基　　金：国家高技术研究发展计划(863计划)重点课题(2007AA030304);国家自然科学基金资助项目(20874073);天津市科技计划项目(10SYSYJC27900)

摘　　要：以聚乙烯醇(PVA)和硼酸(H3BO3)的凝胶体为纺丝载体,由聚四氟乙烯(PTFE)分散乳液通过凝胶纺丝法制备PTFE/PVA初生中空纤维,经烧结去除载体,得到聚四氟乙烯中空纤维膜.通过在成膜体系中引入纳米无机粒子碳酸钙(CaCO3),经后拉伸得到具有界面微孔结构的PTFE/CaCO3杂化中空纤维膜.研究了PVA和H3BO3的络合机理,并讨论了CaCO3对杂化中空纤维膜性能及结构的影响.通过对膜的表面形貌观察表明所得PTFE中空纤维膜是一种均质膜,形成的界面微孔结构不同于PTFE双向拉伸产生的纤维-结点状裂隙孔结构,界面微孔的数量和孔径随着后拉伸倍数的增加呈增大的趋势.Using the gel of poly（vinyl alcohol） （PVA） and boric acid （Ha BO3） as the fiber forming polymer, introducing the nano-scale CaCOa particles into spinning solution, polytetrafluoroethylene （PTFE）/CaCOa hybrid hollow fiber membrane which has the interfacial micro-voids pore structure was prepared by the concentrated PTFE suspension. The gel mechanism of PVA and HaBO3 and the effects of CaC03 on the properties and structure of hybrid hollow fiber membrane were investigated. By the morphology observation, the hollow fiber membrane obtained is a kind of homogenous membrane. The interracial micro-voids are different from the node-fibril network produced by biaxial stretched method. The quantity and the pore size got improved when the draw ratio increases.

关 键 词：聚四氟乙烯 纺丝载体 中空纤维膜 界面微孔 

分 类 号：TB383.2[一般工业技术—材料科学与工程]