Please use this identifier to cite or link to this item:
Title: Double-skinned forward osmosis membranes for reducing internal concentration polarization within the porous sublayer
Authors: Wang, K.Y. 
Ong, R.C. 
Chung, T.-S. 
Issue Date: 19-May-2010
Citation: Wang, K.Y., Ong, R.C., Chung, T.-S. (2010-05-19). Double-skinned forward osmosis membranes for reducing internal concentration polarization within the porous sublayer. Industrial and Engineering Chemistry Research 49 (10) : 4824-4831. ScholarBank@NUS Repository.
Abstract: A scheme to fabricate forward osmosis membranes comprising a highly porous sublayer sandwiched between two selective skin layers via phase inversion was proposed. One severe deficiency of existing composite and asymmetric membranes used in forward osmosis is the presence of unfavorable internal concentration polarization within the porous support layer that hinders both (i) separation (salt flux) and (ii) the performance (water flux). The double skin layers of the tailored membrane may mitigate the internal concentration polarization by preventing the salt and other solutes in the draw solution from penetrating into the membrane porous support. The prototype double-skinned cellulose acetate membrane displayed a water flux of 48.2 L·m-2·h -1 and lower reverse salt transport of 6.5 g·m -2·h-1 using 5.0 M MgCl2 as the draw solution in a forward osmosis process performed at 22 °C. This can be attributed to the effective salt rejection by the double skin layers and the low water transport resistance within the porous support layer. The prospects of utilizing the double-selective layer membranes may have potential application in forward osmosis for desalination. This study may help pave the way to improve the membrane design for the forward osmosis process. © 2010 American Chemical Society.
Source Title: Industrial and Engineering Chemistry Research
ISSN: 08885885
DOI: 10.1021/ie901592d
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Jan 23, 2023


checked on Jan 23, 2023

Page view(s)

checked on Jan 26, 2023

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.