Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.ces.2008.12.032
Title: Enhanced forward osmosis from chemically modified polybenzimidazole (PBI) nanofiltration hollow fiber membranes with a thin wall
Authors: Wang, K.Y. 
Yang, Q. 
Chung, T.-S. 
Rajagopalan, R. 
Keywords: Desalination
Forward osmosis
Hollow fiber
Membranes
Nanofiltration
Polybenzimidazole
Separation
Issue Date: 1-Apr-2009
Source: Wang, K.Y., Yang, Q., Chung, T.-S., Rajagopalan, R. (2009-04-01). Enhanced forward osmosis from chemically modified polybenzimidazole (PBI) nanofiltration hollow fiber membranes with a thin wall. Chemical Engineering Science 64 (7) : 1577-1584. ScholarBank@NUS Repository. https://doi.org/10.1016/j.ces.2008.12.032
Abstract: To develop high-flux and high-rejection forward osmosis (FO) membranes for water reuses and seawater desalination, we have fabricated polybenzimidazole (PBI) nanofiltration (NF) hollow fiber membranes with a thin wall and a desired pore size via non-solvent induced phase inversion and chemically cross-linking modification. The cross-linking by p-xylylene dichloride can finely tune the mean pore size and enhance the salt selectivity. High water permeation flux and improved salt selectivity for water reuses were achieved by using the 2-h modified PBI NF membrane which has a narrow pore size distribution. Cross-linking at a longer time produces even a lower salt permeation flux potentially suitable for desalination but at the expense of permeation flux due to tightened pore sizes. It is found that draw solution concentration and membrane orientations are main factors determining the water permeation flux. In addition, effects of membrane morphology and operation conditions on water and salt transport through membrane have been investigated. © 2008 Elsevier Ltd. All rights reserved.
Source Title: Chemical Engineering Science
URI: http://scholarbank.nus.edu.sg/handle/10635/63841
ISSN: 00092509
DOI: 10.1016/j.ces.2008.12.032
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