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Chemical modification of poly(substituted‐acetylene). IV. Pervaporation of organic liquid/water mixture through poly(1‐phenyl‐1‐propyne)/polydimethylsiloxane graft copolymer membrane
Author(s) -
Nagase Yu,
Mori Shigehiro,
Matsui Kiyohide
Publication year - 1989
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.1989.070370510
Subject(s) - pervaporation , membrane , copolymer , permeation , solubility , chemical engineering , polymer chemistry , semipermeable membrane , aqueous solution , polydimethylsiloxane , materials science , solvent , chemistry , organic chemistry , polymer , biochemistry , engineering
Poly(1‐phenyl‐1‐propyne)/polydimethysiloxane (PPP/PDMS) graft copolymer membranes having various PDMS content were prepared by solvent casting method, and the permeation characteristics at pervaporation were examined upon the aqueous solutions containing organic liquids such as alcohols, acetone, dioxane, acetonitrile, pyridine, and DMF. At pervaporation of ethanol/water mixture, preferential permeation of ethanol was observed for all the copolymer membranes, although PPP membrane showed water permselectivity. The permselectivity of the copolymer membrane also depended on operation temperature, but was independent on the thickness of the membrane. Furthermore, an excellent permselectivity of organic liquids was observed at the pervaporation of several organic liquid/water mixtures except in the case of DMF/water mixture. Observed high selectivity is thought to be due to the depression of the membrane swelling and the high solubility of the liquids into the membrane.