Enhanced forward osmosis from chemically modified polybenzimidazole (PBI) nanofiltration hollow fiber membranes with a thin wall

Handle URI:
http://hdl.handle.net/10754/598179
Title:
Enhanced forward osmosis from chemically modified polybenzimidazole (PBI) nanofiltration hollow fiber membranes with a thin wall
Authors:
Wang, Kai Yu; Yang, Qian; Chung, Tai-Shung; Rajagopalan, Raj
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.
Citation:
Wang KY, Yang Q, Chung T-S, Rajagopalan R (2009) Enhanced forward osmosis from chemically modified polybenzimidazole (PBI) nanofiltration hollow fiber membranes with a thin wall. Chemical Engineering Science 64: 1577–1584. Available: http://dx.doi.org/10.1016/j.ces.2008.12.032.
Publisher:
Elsevier BV
Journal:
Chemical Engineering Science
Issue Date:
Apr-2009
DOI:
10.1016/j.ces.2008.12.032
Type:
Article
ISSN:
0009-2509
Sponsors:
The authors would like to thank King Abdullah University of Science and Technology (KAUST), Saudi Arabia and National University of Singapore (NUS) for funding this research project with grant numbers of R-279-000-265-597 and R-279-000-265-598. Thanks are also due to the reviewers who provide valuable suggestion, scientific explanations and comments.
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Full metadata record

DC FieldValue Language
dc.contributor.authorWang, Kai Yuen
dc.contributor.authorYang, Qianen
dc.contributor.authorChung, Tai-Shungen
dc.contributor.authorRajagopalan, Rajen
dc.date.accessioned2016-02-25T13:14:11Zen
dc.date.available2016-02-25T13:14:11Zen
dc.date.issued2009-04en
dc.identifier.citationWang KY, Yang Q, Chung T-S, Rajagopalan R (2009) Enhanced forward osmosis from chemically modified polybenzimidazole (PBI) nanofiltration hollow fiber membranes with a thin wall. Chemical Engineering Science 64: 1577–1584. Available: http://dx.doi.org/10.1016/j.ces.2008.12.032.en
dc.identifier.issn0009-2509en
dc.identifier.doi10.1016/j.ces.2008.12.032en
dc.identifier.urihttp://hdl.handle.net/10754/598179en
dc.description.abstractTo 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.en
dc.description.sponsorshipThe authors would like to thank King Abdullah University of Science and Technology (KAUST), Saudi Arabia and National University of Singapore (NUS) for funding this research project with grant numbers of R-279-000-265-597 and R-279-000-265-598. Thanks are also due to the reviewers who provide valuable suggestion, scientific explanations and comments.en
dc.publisherElsevier BVen
dc.subjectDesalinationen
dc.subjectForward osmosisen
dc.subjectHollow fiberen
dc.subjectMembranesen
dc.subjectNanofiltrationen
dc.subjectPolybenzimidazoleen
dc.subjectSeparationen
dc.titleEnhanced forward osmosis from chemically modified polybenzimidazole (PBI) nanofiltration hollow fiber membranes with a thin wallen
dc.typeArticleen
dc.identifier.journalChemical Engineering Scienceen
dc.contributor.institutionNational University of Singapore, Singapore City, Singaporeen
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