Universiti Teknologi Malaysia Institutional Repository

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

Ahmed, Iqbal and Che Pa, Nasrul Fikry and Mohd. Nawawi, Mohd. Ghazali and Wan Abdul Rahman, Wan Aizan (2011) Modified polydimethylsiloxane/polystyrene blended IPN pervaporation membrane for ethanol/water separation. Journal of Applied Polymer Science, 122 (4). pp. 2666-2679. ISSN 0021-8995

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1002/app.34319


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:Q Science > QD Chemistry
Divisions:Chemical and Natural Resources Engineering
ID Code:29443
Deposited By: Yanti Mohd Shah
Deposited On:12 Mar 2013 02:18
Last Modified:31 Mar 2019 08:23

Repository Staff Only: item control page