南京大学学报（自然科学版）2016，Vol.52Issue(2)：229-234,6.DOI:10.13232/j.cnki.jnju.2016.02.003
热致相法制备聚丙烯-聚乳酸共混中空纤维膜及其性能测试
Polypropylene-poly(lactic acid)hollow fiber membrane by thermally induced phase separation and its performance test
摘要
Abstract
The purpose of this work is to fabricate porous isotactic polyproylene (iPP)membrane with uniformly dispersed poly lactic acid(PLA)porous particles inside.In order to extend its application in biomedical field,surface hydrophilic modification was carried out.In this study,iPP-PLA blend hollow fiber membranes were prepared via thermally induced phase separation(TIPS)method and PLA surface ester group hydrolysis under alkali solution was applied to improve its hydrophilicity.The effect of different diluent mixture ratio on the mechanical properties was measured and compared by tensile strength tests.For further evaluation of potential biomedical application in blood gas separation like membrane oxygenator,O 2 and CO 2 gas permeation properties of the iPP-PLA membrane was in-vestigated,and optimized fabrication parameter was then selected.Water contact angle was measured to indicate hy-drophobic to hydrophilic change after surface alkali hydrolysis.The SEM was used to characterize the morphology of the membrane and the results showed that in iPP-PLA blend system,with MAH-g-PP as surfactant agent,partially miscible was observed and porous PLA particles,also formed via TIPS,dispersed in iPP matrix uniformly with 10-20 μm in size.Mechanical property measurements showed that iPP-PLA membrane demonstrates larger elongation at break than iPP membrane and biggest gas permeation rate was achieved with 5:5 diluent ratio.After hydrolysis, smaller water contact angle of iPP-PLA hollow fiber membrane surface indicates significantly hydrophilic improve-ment.关键词
聚丙烯-聚乳酸/中空纤维膜/热致相法/表面水解Key words
polypropylene-poly (lactic acid )/hollow fiber membranes/thermally induced phase separation/surface hydrolysis分类
化学化工引用本文复制引用
徐志红,黄鑫,王伟平,郭强,李磊,张志炳..热致相法制备聚丙烯-聚乳酸共混中空纤维膜及其性能测试[J].南京大学学报（自然科学版）,2016,52(2):229-234,6.基金项目
江苏省自然科学基金面上项目(BK2012727) （BK2012727）
