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Article: Influence of the properties of layer-by-layer active layers on forward osmosis performance

TitleInfluence of the properties of layer-by-layer active layers on forward osmosis performance
Authors
KeywordsFo Performance Optimization
Forward Osmosis Membrane
Layer-By-Layer Adsorption
Membrane Characterization
Issue Date2012
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci
Citation
Journal Of Membrane Science, 2012, v. 423-424, p. 536-542 How to Cite?
AbstractThe advancement of forward osmosis (FO) technology requires separation membranes with appropriate transport characteristics. The layer-by-layer (LbL) method exhibits great flexibility for fabricating the active layer of FO membrane with controllable separation properties. The current work focused on investigating the effect of LbL active layer properties on the FO performance. A series of FO membranes were prepared with varied number of polyelectrolyte bilayers which were composed of positively charged poly(allylamine hydrochloride) (PAH) and negatively charged poly(sodium 4-styrene-sulfonate) (PSS), with either PAH or PSS as the terminating layer. The active layers were characterized in terms of contact angle, surface roughness, and zeta potential, which were exploited to explain the variations of the intrinsic transport properties (the hydraulic permeability and the solute permeability) of the polyelectrolyte multilayer films. FO filtration experiments were carried out to assess the performance of the same series of FO membranes. Both the filtration flux and the FO efficiency were demonstrated as a strong function of the LbL active layers. This dependency was rationalized by analyzing the relative importance of the different transport mechanisms during the FO processes, which were inherently correlated to the intrinsic transport properties of the multilayer films. The current investigation not only justifies the feasibility of improving the FO performance by properly controlling the number of the polyelectrolyte bilayers and the surface charge, but also makes the underlying mechanisms comprehensible. © 2012 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/185432
ISSN
2015 Impact Factor: 5.557
2015 SCImago Journal Rankings: 2.042
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorQi, Sen_US
dc.contributor.authorLi, Wen_US
dc.contributor.authorZhao, Yen_US
dc.contributor.authorMa, Nen_US
dc.contributor.authorWei, Jen_US
dc.contributor.authorChin, TWen_US
dc.contributor.authorTang, CYen_US
dc.date.accessioned2013-07-30T07:32:29Z-
dc.date.available2013-07-30T07:32:29Z-
dc.date.issued2012en_US
dc.identifier.citationJournal Of Membrane Science, 2012, v. 423-424, p. 536-542en_US
dc.identifier.issn0376-7388en_US
dc.identifier.urihttp://hdl.handle.net/10722/185432-
dc.description.abstractThe advancement of forward osmosis (FO) technology requires separation membranes with appropriate transport characteristics. The layer-by-layer (LbL) method exhibits great flexibility for fabricating the active layer of FO membrane with controllable separation properties. The current work focused on investigating the effect of LbL active layer properties on the FO performance. A series of FO membranes were prepared with varied number of polyelectrolyte bilayers which were composed of positively charged poly(allylamine hydrochloride) (PAH) and negatively charged poly(sodium 4-styrene-sulfonate) (PSS), with either PAH or PSS as the terminating layer. The active layers were characterized in terms of contact angle, surface roughness, and zeta potential, which were exploited to explain the variations of the intrinsic transport properties (the hydraulic permeability and the solute permeability) of the polyelectrolyte multilayer films. FO filtration experiments were carried out to assess the performance of the same series of FO membranes. Both the filtration flux and the FO efficiency were demonstrated as a strong function of the LbL active layers. This dependency was rationalized by analyzing the relative importance of the different transport mechanisms during the FO processes, which were inherently correlated to the intrinsic transport properties of the multilayer films. The current investigation not only justifies the feasibility of improving the FO performance by properly controlling the number of the polyelectrolyte bilayers and the surface charge, but also makes the underlying mechanisms comprehensible. © 2012 Elsevier B.V.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memscien_US
dc.relation.ispartofJournal of Membrane Scienceen_US
dc.subjectFo Performance Optimizationen_US
dc.subjectForward Osmosis Membraneen_US
dc.subjectLayer-By-Layer Adsorptionen_US
dc.subjectMembrane Characterizationen_US
dc.titleInfluence of the properties of layer-by-layer active layers on forward osmosis performanceen_US
dc.typeArticleen_US
dc.identifier.emailTang, CY: tangc@hku.hken_US
dc.identifier.authorityTang, CY=rp01765en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.memsci.2012.09.009en_US
dc.identifier.scopuseid_2-s2.0-84867742838en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84867742838&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume423-424en_US
dc.identifier.spage536en_US
dc.identifier.epage542en_US
dc.identifier.isiWOS:000311480800058-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridQi, S=48461816800en_US
dc.identifier.scopusauthoridLi, W=46661142300en_US
dc.identifier.scopusauthoridZhao, Y=55324866000en_US
dc.identifier.scopusauthoridMa, N=35771210500en_US
dc.identifier.scopusauthoridWei, J=55360900400en_US
dc.identifier.scopusauthoridChin, TW=55362158600en_US
dc.identifier.scopusauthoridTang, CY=35489259800en_US

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