Premium
Influence of quench medium on the structure and gas permeation properties of cellulose acetate membranes
Author(s) -
Hao Ji Hua,
Wang Shichang
Publication year - 1998
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(19980523)68:8<1269::aid-app8>3.0.co;2-b
Subject(s) - cellulose acetate , membrane , phase inversion , acetone , permeation , chemical engineering , methanol , cellulose , polymer chemistry , cellulose triacetate , materials science , gas separation , polymer , chemistry , selectivity , chromatography , nuclear chemistry , organic chemistry , catalysis , biochemistry , engineering
Integrally skinned asymmetric cellulose acetate membranes made by the wet phase inversion for removal of CO 2 from natural gas were investigated. The membrane was cast with the membrane‐forming systems of cellulose acetate–acetone and quench media, such as methanol, ethanol and isopropanol, respectively, without heat‐treating and multistage exchange process. By means of evaluation on separating characteristics of the membrane for CO 2 /CH 4 , observation of morphologies by scanning electron photomicrographs and analysis of the phase diagrams on the membrane‐forming systems, it has shown that the membrane‐forming system of cellulose acetate–acetone–methanol is quite suitable to prepare integrally skinned asymmetric cellulose acetate membranes for gas separation with good selectivity CO 2 /CH 4 = 30 and flux coefficient = 2.4 × 10 −5 cm 3 /cm 2 − s − cm Hg. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 68: 1269–1276, 1998