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Modified polydimethylsiloxane/polystyrene blended IPN pervaporation membrane for ethanol/water separation

Ahmed, Iqbal and Nasrul Fikry, Che Pa and Mohd Ghazali, Mohd Nawawi and Wan Aizan Wan, Abd Rahman (2011) Modified polydimethylsiloxane/polystyrene blended IPN pervaporation membrane for ethanol/water separation. Journal of Applied Polymer Science, 122 (4). pp. 2666-2679. ISSN 1097-4628

Modified polydimethylsiloxane-polystyrene blended IPN pervaporation .pdf

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In this article a modified polydimethylsiloxane (PDMS) blended polystyrene (PS) interpenetrating polymer network (IPN) membranes supported by Teflon (polytetrafluoroethylene) ultrafiltration membrane were prepared for the separation of ethanol in water by pervaporation application. The relationship between the surface characteristics of the surface‐modified PDMS membranes and their permselectivity for aqueous ethanol solutions by pervaporation are discussed. The IPN supported membranes were prepared by sequential IPN technique. The IPN supported membrane were tested for the separation performance on 10 wt % ethanol in water and were characterized by evaluating their mechanical properties, swelling behavior, density, and degree of crosslinking. The results indicated that separation performance, mechanical properties, density, and the percentage of swelling of IPN membranes were influenced by degree of crosslink density. Depending on the feed temperature, the supported membranes had separation factors between 2.03 and 6.00 and permeation rates between 81.66 and 144.03 g m−2 h−1. For the azeotropic water–ethanol mixture (10 wt % ethanol), the supported membrane had at 30°C a separation factor of 6.00 and a permeation rate of 85 g m−2 h−1. Compared to the PDMS supported membranes, the PDMS/PS IPN supported blend membrane ones had a higher selectivity but a somewhat lower permeability.

Item Type: Article
Uncontrolled Keywords: interpenetrating polymer network; pervaporation; polydimethylsiloxane; polystyrene; water-ethanol mixtures
Subjects: T Technology > TP Chemical technology
Faculty/Division: Faculty of Chemical & Natural Resources Engineering
Institute of Postgraduate Studies
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 19 Feb 2020 07:46
Last Modified: 19 Feb 2020 07:50
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