Negatively Charged Hyperbranched Polyglycerol Grafted Membranes for Osmotic Power Generation from Municipal Wastewater

Handle URI:
http://hdl.handle.net/10754/582470
Title:
Negatively Charged Hyperbranched Polyglycerol Grafted Membranes for Osmotic Power Generation from Municipal Wastewater
Authors:
Li, Xue; Cai, Tao; Chen, Chunyan; Chung, Neal Tai-Shung ( 0000-0003-3704-8609 )
Abstract:
Osmotic power holds great promise as a clean, sustainable and largely unexploited energy resource. Recent membrane development for pressure-retarded osmosis (PRO) is making the osmotic power generation more and more realistic. However, severe performance declines have been observed because the porous layer of PRO membranes is fouled by the feed stream. To overcome it, a negatively charged antifouling PRO hollow fiber membrane has been designed and studied in this work. An antifouling polymer, derived from hyperbranched polyglycerol and functionalized by α-lipoic acid and succinic anhydride, was synthesized and grafted onto the polydopamine (PDA) modified poly(ether sulfone) (PES) hollow fiber membranes. In comparison to unmodified membranes, the charged hyperbranched polyglycerol (CHPG) grafted membrane is much less affected by organic deposition, such as bovine serum albumin (BSA) adsorption, and highly resistant to microbial growths, demonstrated by E. coli adhesion and S. aureus attachment. CHPG-g-TFC was also examined in PRO tests using a concentrated wastewater as the feed. Comparing to the plain PES-TFC and non-charged HPG-g-TFC, the newly developed membrane exhibits not only the smallest decline in water flux but also the highest recovery rate. When using 0.81 M NaCl and wastewater as the feed pair in PRO tests at 15 bar, the average power density remains at 5.6 W/m2 in comparison to an average value of 3.6 W/m2 for unmodified membranes after four PRO runs. In summary, osmotic power generation may be sustained by properly designing and anchoring the functional polymers to PRO membranes.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC)
Citation:
Negatively Charged Hyperbranched Polyglycerol Grafted Membranes for Osmotic Power Generation from Municipal Wastewater 2015 Water Research
Publisher:
Elsevier BV
Journal:
Water Research
Issue Date:
18-Nov-2015
DOI:
10.1016/j.watres.2015.11.032
Type:
Article
ISSN:
00431354
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S0043135415303596
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorLi, Xueen
dc.contributor.authorCai, Taoen
dc.contributor.authorChen, Chunyanen
dc.contributor.authorChung, Neal Tai-Shungen
dc.date.accessioned2015-11-22T12:03:18Zen
dc.date.available2015-11-22T12:03:18Zen
dc.date.issued2015-11-18en
dc.identifier.citationNegatively Charged Hyperbranched Polyglycerol Grafted Membranes for Osmotic Power Generation from Municipal Wastewater 2015 Water Researchen
dc.identifier.issn00431354en
dc.identifier.doi10.1016/j.watres.2015.11.032en
dc.identifier.urihttp://hdl.handle.net/10754/582470en
dc.description.abstractOsmotic power holds great promise as a clean, sustainable and largely unexploited energy resource. Recent membrane development for pressure-retarded osmosis (PRO) is making the osmotic power generation more and more realistic. However, severe performance declines have been observed because the porous layer of PRO membranes is fouled by the feed stream. To overcome it, a negatively charged antifouling PRO hollow fiber membrane has been designed and studied in this work. An antifouling polymer, derived from hyperbranched polyglycerol and functionalized by α-lipoic acid and succinic anhydride, was synthesized and grafted onto the polydopamine (PDA) modified poly(ether sulfone) (PES) hollow fiber membranes. In comparison to unmodified membranes, the charged hyperbranched polyglycerol (CHPG) grafted membrane is much less affected by organic deposition, such as bovine serum albumin (BSA) adsorption, and highly resistant to microbial growths, demonstrated by E. coli adhesion and S. aureus attachment. CHPG-g-TFC was also examined in PRO tests using a concentrated wastewater as the feed. Comparing to the plain PES-TFC and non-charged HPG-g-TFC, the newly developed membrane exhibits not only the smallest decline in water flux but also the highest recovery rate. When using 0.81 M NaCl and wastewater as the feed pair in PRO tests at 15 bar, the average power density remains at 5.6 W/m2 in comparison to an average value of 3.6 W/m2 for unmodified membranes after four PRO runs. In summary, osmotic power generation may be sustained by properly designing and anchoring the functional polymers to PRO membranes.en
dc.language.isoenen
dc.publisherElsevier BVen
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0043135415303596en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Water Research. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Water Research, 18 November 2015. DOI: 10.1016/j.watres.2015.11.032en
dc.subjectPoly(ether sulfone)en
dc.subjectpressure-retarded osmosisen
dc.subjectthin-film composite membranesen
dc.subjectfoulingen
dc.subjectmunicipal wastewateren
dc.subjectosmotic poweren
dc.titleNegatively Charged Hyperbranched Polyglycerol Grafted Membranes for Osmotic Power Generation from Municipal Wastewateren
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalWater Researchen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Chemical & Biomolecular Engineering, National University of Singapore, Kent Ridge, Singapore 117585en
dc.contributor.institutionKey Laboratory of Biomedical Polymers of Ministry of Education, Department of Chemistry, Wuhan University, Wuhan, China 430072en
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorChung, Neal Tai-Shungen
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