文献类型：期刊文献

英文题名：Structure Regulation of Polypropylene/Poly(ethylene-co-vinyl alcohol) Hollow Fiber Membranes with a Bimodal Microporous Structure Prepared by Melt-Spinning and Stretching: The Role of Melt-Draw Ratio

作者：Luo, Dajun Sun, Xin Gao, Jin Xie, Gaoyi Qin, Shuhao

第一作者：Luo, Dajun

通信作者：Qin, SH[1]

机构：[1]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China;[2]Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Peoples R China;[3]Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Peoples R China;[4]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Natl Engn Res Ctr Compounding & Modificat Polymer, Guiyang 550014, Peoples R China.

年份：2021

卷号：60

期号：37

起止页码：13674-13683

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000700883000023)】；

基金：This work was supported by the Science and Technology Planning Project of Guizhou Province (ZK [2021] General 246), the Natural Science Research Project of Guizhou Provincial Department of Education (Qian Jiao He KY Words [2021]256), the Academic New Seedling Cultivation and Innovation Exploration Project of Guizhou Institute of Technology (GZLGXM-06), and the National Natural Science Foundation of China (51803039).

语种：英文

外文关键词：Fibers - Lamellar structures - Melt spinning - Microporosity - Morphology - Phase interfaces - Polypropylenes - Pore size - Spinning (fibers)

摘要：High-performance polymeric hollow fiber membranes fabricated by a green and sustainable route have become the direction of the future. The bimodal microporous structure was green formed via melt spinning-stretching in the polypropylene (PP)/poly(ethylene-co-vinyl alcohol) (EVOH) hollow fiber membranes (PP/EVOH-HFMs) for improving the porosity and retaining the rejection performance. The relationship between the PP lamellar microstructure, the two-phase interface area, and the EVOH island morphology in PP/EVOH hollow fibers and the bimodal microporous structure in PP/EVOH-HFMs under different melt-draw ratios was established. The pore size of the bimodal microporous structure was controlled by regulating the melt-draw ratio. Small micropore sizes increased from 95 to 183 nm, and large micropore sizes decreased gradually from 3916 to 1054 nm with the melt-draw ratios increased. The porosity and pure water flux of PP/EVOH-HFM reached the maximum when the melt-draw ratio was 6000%. Moreover, the models of phase morphology and microstructure of PP/EVOH blends, PP/EVOH hollow fibers, and PP/EVOH-HFMs were built to explain the regulation mechanism of melt-draw ratio on the bimodal microporous structure of membranes.