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Separation of liquid mixtures by using polymer membranes. IV. Water‐alcohol separation by pervaporation through modified acrylonitrile grafted polyvinyl alcohol copolymer (PVA‐G‐AN) membranes
Author(s) -
Chiang WenYen,
Huang ChingChong
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.1993.070480202
Subject(s) - pervaporation , polyvinyl alcohol , membrane , acrylonitrile , copolymer , chemical engineering , polymer chemistry , aqueous solution , materials science , polymer , alcohol , vinyl alcohol , chemistry , permeation , organic chemistry , composite material , biochemistry , engineering
Abstract The acrylonitrile (AN) grafted onto polyvinyl alcohol (PVA) can improve the mechanical properties and water resistance of PVA; however, its hydrophilicity is decreased. Prepared PVA‐g‐AN membranes through modification with the NaOH and HCHO aqueous solutions can enhance its hydrophilicity. This modified PVA‐g‐AN membranes were used to separate alcohol/water solution with the pervaporation method. The flux was increased from 0.72 kg/m 2 h of the original membrane to 2.06 kg/m 2 h of the modified membrane. Moreover, adding a small quantity of CoSO 4 to the water‐alcohol mixture can simultaneously increase the separation factor. © 1993 John Wiley & Sons, Inc.