Premium
Gas permeation properties of a composite membrane filled with poly(ethylene oxide) into a porous membrane
Author(s) -
Tsutsui Kimiaki,
Yoshimizu Hiroaki,
Tsujita Yoshiharu,
Kinoshita Takatoshi
Publication year - 1999
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/(sici)1097-4628(19990923)73:13<2733::aid-app21>3.0.co;2-o
Subject(s) - crystallinity , permeation , ethylene oxide , materials science , membrane , permeability (electromagnetism) , composite number , solubility , chemical engineering , crystallization , porosity , polymer chemistry , oxide , composite material , chemistry , polymer , organic chemistry , biochemistry , engineering , copolymer , metallurgy
The permeability coefficients of O 2 , N 2 , and CO 2 gases at 25°C were examined for composite membranes that were prepared by filling poly(ethylene oxide)(PEO) with different molecular weights into a porous membrane. The permeability coefficients of O 2 , N 2 , and CO 2 were 2 × 10 −10 – 4 × 10 −10 , 5 × 10 −11 – 9.5 × 10 −11 , and 6 × 10 −10 – 1 × 10 −9 (cm 3 STPcm/cm 2 s cmHg), respectively. The higher permeability coefficients of CO 2 are explained in terms of high solubility of CO 2 in filled PEO. The permeability coefficient of CO 2 was affected by the degree of crystallinity of PEO in the composite. On the other hand, there was little effect of crystallinity on O 2 and N 2 permeability coefficients. Some probable relationships between selectivities of O 2 to N 2 and CO 2 to N 2 and the degree of crystallinity of PEO were observed. The CO 2 gas permeability coefficients of the composite membrane for PEO50000 ( M w = 5 × 10 4 ) showed a marked change due to melting or crystallization of PEO. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 2733–2738, 1999