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Cellulose–poly(acrylamide or acrylic acid) interpenetrating polymer network membranes for the pervaporation of water–ethanol mixtures
Author(s) -
Buyanov A. L.,
Revel'skaya L. G.,
Kuznetzov Yu. P.,
Shestakova A. S.
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(19980725)69:4<761::aid-app14>3.0.co;2-s
Subject(s) - pervaporation , membrane , acrylic acid , polymer chemistry , interpenetrating polymer network , cellulose , cellophane , acrylamide , polymer , chemical engineering , polyacrylamide , materials science , polymerization , permeation , chemistry , organic chemistry , copolymer , biochemistry , engineering
A new type of interpenetrating polymer network (IPN) pervaporation membranes based on cellulose and synthetic polymers was developed. They were prepared by free‐radical polymerization of acrylamide or acrylic acid in the presence (or absence) of the crosslinking agent (allyldextran or N,N ′‐methylenebisacrylamide) within cellophane films swollen in the reaction mixture. The swelling behavior of these membranes in water–ethanol solutions and their separation characteristics were investigated depending on the polyacrylamide (PAAm) or poly(acrylic acid) (PAA) content in the IPN ( C p ) and for ionic cellulose–PAA membranes depending on the degree of neutralization of carboxylic groups and on the type of counterions. IPN membranes were selective over a wide range of ethanol concentration in the feed. The separation factor (α) and the permeation rate ( P ) significantly improved with increasing C p in IPN membranes, especially for the cellulose–PAA(K + form) membranes (for 86% EtOH feed at 50°C, and α and P values reached 1500 and 1.6 kg/m 2 h, respectively). The results for ionic and nonionic IPN membranes were compared. The separation characteristics of membranes were in good correlation with their swelling behavior. The α values of the membranes depended on the affinity of the IPN polymer chains functional groups for water. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 761–769, 1998