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3117048 
Journal Article 
Synthesis and characterization of GTMAC grafted chitosan membranes for the dehydration of low water content isopropanol by pervaporation 
Sajjan, AM; Premakshi, HG; Kariduraganavar, MY 
2015 
Yes 
Journal of Industrial and Engineering Chemistry
ISSN: 1226-086X 
25 
151-161 
WOS:000356200400023 
Glycidyltrimethylammonium chloride (GTMAC) grafted chitosan (CS) membranes were prepared by the solution casting technique. The chemical composition and morphological characteristics of the prepared GTMAC/CS membranes were investigated by various techniques such as Fourier transform infrared (FTIR) spectroscopy, wide-angle X-ray diffraction (WAXD), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The effects of grafting and feed composition on pervaporation performance of the membranes were systematically studied. The membrane containing 40 mass% of GTMAC exhibited the highest separation selectivity of 2133 with a flux of 6.91 x 10(-2) kg/m(2) h at 30 degrees C for 10 mass% of water in the feed. The total flux and flux of water are almost overlapping each other, manifesting that these membranes could be used effectively to break the azeotropic point of water-isopropanol mixture. From the temperature dependent diffusion and permeation values, the Arrhenius activation parameters were estimated. The activation energy values obtained for water permeation (E-pw) are significantly lower than those of isopropanol permeation (E-pIPA), suggesting that the grafted membranes developed here have higher separation ability for water-isopropanol system. The positive heat of sorption (Delta H-s) values was obtained for all the grafted membranes, suggesting that the Henry's mode of sorption is predominant. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved. 
Chitosan; GTMAC; Isopropanol; Pervaporation; Selectivity; Activation energy