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Preparation and characterization of microporous polyethylene hollow fiber membranes
Author(s) -
Shen LiQiang,
Xu ZhiKang,
Xu YouYi
Publication year - 2002
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.10305
Subject(s) - microporous material , membrane , permeation , materials science , fiber , spinning , polyethylene , porosity , composite material , melt spinning , chemical engineering , polymer chemistry , chemistry , biochemistry , engineering
Microporous polyethylene (PE) hollow fiber membrane with a porosity of 43% and N 2 permeation of 4.96 cm 3 (STP)/cm 2 s cmHg was prepared by melt‐spinning and cold‐stretching method. It was found that PE with a density higher than 0.96 g/cm 3 should be used for the preparation of microporous PE hollow fiber membranes. By increasing the spin–draw ratio, both the porosity and the N 2 permeation of the hollow fiber membranes increased. Annealing the nascent hollow fiber at 115°C for 2 h was suitable for attaining membranes with good performance. By straining the hollow fiber to higher extensions, the amount and size of the micropores in the hollow fiber wall increased, and the N 2 permeation of the membranes increased accordingly. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 84: 203–210, 2002; DOI 10.1002/app.10305