Novel cellulose ester substrates for high performance flat-sheet thin-film composite (TFC) forward osmosis (FO) membranes

Handle URI:
http://hdl.handle.net/10754/594076
Title:
Novel cellulose ester substrates for high performance flat-sheet thin-film composite (TFC) forward osmosis (FO) membranes
Authors:
Ong, Rui Chin; Chung, Neal Tai-Shung ( 0000-0003-3704-8609 ) ; de Wit, Jos S.; Helmer, Bradley J.
Abstract:
A novel hydrophilic cellulose ester with a high intrinsic water permeability and a water partition coefficient was discovered to construct membrane supports for flat-sheet thin film composite (TFC) forward osmosis (FO) membranes for water reuse and seawater desalination with high performance. The performance of TFC-FO membranes prepared from the hydrophilic cellulose ester containing a high degree of OH and a moderate degree of Pr substitutions clearly surpasses those prepared from cellulose esters and other polymers with moderate hydrophilicity. Post-treatments of TFC-FO membranes using sodium dodecyl sulfate (SDS) and glycerol followed by heat treatment further enhance the water flux without compromising the selectivity. Positron annihilation lifetime analyses have confirmed that the SDS/glycerol post-treatment increases the free volume size and fractional free volume of the polyamide selective layer. The newly developed post-treated TFC-FO membranes exhibit a remarkably high water flux up to 90 LMH when the selective layer is oriented towards the draw solution (i.e., PRO mode) using 1. M NaCl as the draw solution and DI water as the feed. For seawater desalination, the membranes display a high water flux up to 35 LMH using a 2. M NaCl draw solution. These water fluxes exceeded the water fluxes achieved by other types of FO membranes reported in literatures. © 2014 Elsevier B.V.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC)
Citation:
Ong RC, Chung T-S, de Wit JS, Helmer BJ (2015) Novel cellulose ester substrates for high performance flat-sheet thin-film composite (TFC) forward osmosis (FO) membranes. Journal of Membrane Science 473: 63–71. Available: http://dx.doi.org/10.1016/j.memsci.2014.08.046.
Publisher:
Elsevier BV
Journal:
Journal of Membrane Science
Issue Date:
Jan-2015
DOI:
10.1016/j.memsci.2014.08.046
Type:
Article
ISSN:
0376-7388
Sponsors:
The authors would like to thank Eastman Chemical Company, USA for the provision of the synthesized novel cellulose esters. This research is also supported by the National Research Foundation, Prime Minister's Office, Singapore under its Competitive Research Program for the project entitled, "Advanced FO Membranes and Membrane Systems for Wastewater Treatment, Water Reuse and Seawater Desalination" (Grant numbers: R-279-000-336-281 and R-279-000-339-281). Special thanks are due to Dr. Shipeng Sun and Dr. Sui Zhang for their valuable advices and Ms. Xiaoman Li for her assistance in this work.
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorOng, Rui Chinen
dc.contributor.authorChung, Neal Tai-Shungen
dc.contributor.authorde Wit, Jos S.en
dc.contributor.authorHelmer, Bradley J.en
dc.date.accessioned2016-01-19T13:20:59Zen
dc.date.available2016-01-19T13:20:59Zen
dc.date.issued2015-01en
dc.identifier.citationOng RC, Chung T-S, de Wit JS, Helmer BJ (2015) Novel cellulose ester substrates for high performance flat-sheet thin-film composite (TFC) forward osmosis (FO) membranes. Journal of Membrane Science 473: 63–71. Available: http://dx.doi.org/10.1016/j.memsci.2014.08.046.en
dc.identifier.issn0376-7388en
dc.identifier.doi10.1016/j.memsci.2014.08.046en
dc.identifier.urihttp://hdl.handle.net/10754/594076en
dc.description.abstractA novel hydrophilic cellulose ester with a high intrinsic water permeability and a water partition coefficient was discovered to construct membrane supports for flat-sheet thin film composite (TFC) forward osmosis (FO) membranes for water reuse and seawater desalination with high performance. The performance of TFC-FO membranes prepared from the hydrophilic cellulose ester containing a high degree of OH and a moderate degree of Pr substitutions clearly surpasses those prepared from cellulose esters and other polymers with moderate hydrophilicity. Post-treatments of TFC-FO membranes using sodium dodecyl sulfate (SDS) and glycerol followed by heat treatment further enhance the water flux without compromising the selectivity. Positron annihilation lifetime analyses have confirmed that the SDS/glycerol post-treatment increases the free volume size and fractional free volume of the polyamide selective layer. The newly developed post-treated TFC-FO membranes exhibit a remarkably high water flux up to 90 LMH when the selective layer is oriented towards the draw solution (i.e., PRO mode) using 1. M NaCl as the draw solution and DI water as the feed. For seawater desalination, the membranes display a high water flux up to 35 LMH using a 2. M NaCl draw solution. These water fluxes exceeded the water fluxes achieved by other types of FO membranes reported in literatures. © 2014 Elsevier B.V.en
dc.description.sponsorshipThe authors would like to thank Eastman Chemical Company, USA for the provision of the synthesized novel cellulose esters. This research is also supported by the National Research Foundation, Prime Minister's Office, Singapore under its Competitive Research Program for the project entitled, "Advanced FO Membranes and Membrane Systems for Wastewater Treatment, Water Reuse and Seawater Desalination" (Grant numbers: R-279-000-336-281 and R-279-000-339-281). Special thanks are due to Dr. Shipeng Sun and Dr. Sui Zhang for their valuable advices and Ms. Xiaoman Li for her assistance in this work.en
dc.publisherElsevier BVen
dc.subjectCellulose esteren
dc.subjectForward osmosisen
dc.subjectThin film composite membraneen
dc.titleNovel cellulose ester substrates for high performance flat-sheet thin-film composite (TFC) forward osmosis (FO) membranesen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalJournal of Membrane Scienceen
dc.contributor.institutionDepartment of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, Singaporeen
dc.contributor.institutionEastman Chemical Company, P.O. Box 1972, Kingsport, TN, United Statesen
kaust.authorChung, Neal Tai-Shungen
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