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Preparation of polycarbonate/metal salt gas separation membranes
Author(s) -
Lai JuinYih,
Chen ShihHsiung,
Lee MeiHsiu,
Shyu S. S.
Publication year - 1993
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.1993.070470902
Subject(s) - membrane , selectivity , polycarbonate , gas separation , ultimate tensile strength , oxygen permeability , metal , chemistry , permeability (electromagnetism) , solvent , oxygen , materials science , polymer chemistry , nuclear chemistry , analytical chemistry (journal) , chemical engineering , chromatography , composite material , catalysis , organic chemistry , biochemistry , engineering
Polycarbonate (PC) membranes possess high O 2 /N 2 selectivity and mechanical strength, but have low gas permeability. In order to improve the pure PC membrane's gas permeability and selectivity of O 2 /N 2 , in this study we attempt to combine transition metal salts into the membrane to form a complex membrane. Tensile strength and elongation at break of the membrane are not significantly changed. The effect of casting solution composition and solvent evaporation time on morphology, gas permeability, and selectivity of O 2 /N 2 of PC membranes are studied. The gas permeabilities of PC/DMF/Metals membranes are significantly improved, as compared to those of pure PC membrane. For example, an oxygen permeability of 137 cm 3 (STP)‐cm/cm 2 ‐sec‐cmHg and separation ratio of oxygen to nitrogen of 4.0 for PC/DMF/CuCl 2 membrane with [PC/CH 2 Cl 2 ]/[CuCl 2 /DMF] = 17/3 mL/mL, and CuCl 2 /DMF = 0.1 g/mL, can be obtained. The FT–IR spectra and elementary analysis suggest that there is interaction among metal, DMF, and PC. © 1993 John Wiley & Sons, Inc.