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Effect of the preparation conditions on the permeation of ultrahigh‐molecular‐weight polyethylene/silicon dioxide hybrid membranes
Author(s) -
Li Nana,
Xiao Changfa
Publication year - 2010
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.32073
Subject(s) - diluent , materials science , membrane , polyethylene , chemical engineering , porosity , permeation , solvent , crystal (programming language) , nanofiltration , polymer chemistry , composite material , chemistry , organic chemistry , biochemistry , computer science , engineering , programming language
Porous ultrahigh‐molecular‐weight polyethylene/SiO 2 membranes were prepared by thermally induced phase separation (TIPS) with white mineral oil as the diluent and SiO 2 as an additive. Influential factors, including extraction method, SiO 2 content, and cooling rate, were investigated. The results suggest that the both porosity and pure water flux of the membranes by extraction of the solvent naphtha in the tension state with alcohol were the best among our research. With increasing SiO 2 content, the porosity, pure water flux, and pore diameter increased. However, with excessive SiO 2 content, defects formed easily. Moreover, SiO 2 improved the pressure resistance of the membranes. The cooling rate directly effected the crystal structure. A slow cooling rate was good for crystal growth and the integration of the diluent. Therefore, the porosity, pure water flux, and bubble‐point pore diameter increased with decreasing cooling rate. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010