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Article: Influence of monomer concentrations on the performance of polyamide-based thin film composite forward osmosis membranes

TitleInfluence of monomer concentrations on the performance of polyamide-based thin film composite forward osmosis membranes
Authors
KeywordsForward Osmosis (Fo)
Interfacial Polymerization
Internal Concentration Polarization (Icp)
Monomer Concentration
Polyamide Thin Film Composite (Pa Tfc)
Solute Reverse Diffusion
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci
Citation
Journal Of Membrane Science, 2011, v. 381 n. 1-2, p. 110-117 How to Cite?
AbstractPolyamide thin film composite (TFC) membranes with tailored porous substrate and rejection layer are promising for forward osmosis (FO) applications. The current study investigates the effect of rejection layer synthesis conditions on the performance of the resulting TFC polyamide FO membranes. The influence of monomer concentrations (i.e., m-phenylenediamine (MPD) and trimesoyl chloride (TMC) concentrations) on the membrane separation properties as well as FO performance was systematically studied. A strong trade-off between the water permeability and salt rejection was observed, where increasing the TMC concentration or reducing the MPD concentration resulted in higher membrane permeability but lower salt rejection. In FO tests, membranes with poor salt rejection had severe solute reverse diffusion, which enhanced the internal concentration polarization (ICP). It was found that the FO water flux was governed by both the membrane water permeability and its solute rejection. For a membrane with higher water permeability but lower solute rejection, the reduced membrane frictional resistance was compensated by the simultaneously more severe solute-reverse-diffusion-induced ICP. The net effect on the FO water flux depends on the competition of these two opposing mechanisms. Under conditions where solute reverse diffusion may cause severe ICP (e.g., high draw solution concentration and high water flux level), membranes need be optimized to achieve a high salt rejection even if this is at the expense of lower water permeability. © 2011 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/185406
ISSN
2015 Impact Factor: 5.557
2015 SCImago Journal Rankings: 2.042
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWei, Jen_US
dc.contributor.authorLiu, Xen_US
dc.contributor.authorQiu, Cen_US
dc.contributor.authorWang, Ren_US
dc.contributor.authorTang, CYen_US
dc.date.accessioned2013-07-30T07:32:19Z-
dc.date.available2013-07-30T07:32:19Z-
dc.date.issued2011en_US
dc.identifier.citationJournal Of Membrane Science, 2011, v. 381 n. 1-2, p. 110-117en_US
dc.identifier.issn0376-7388en_US
dc.identifier.urihttp://hdl.handle.net/10722/185406-
dc.description.abstractPolyamide thin film composite (TFC) membranes with tailored porous substrate and rejection layer are promising for forward osmosis (FO) applications. The current study investigates the effect of rejection layer synthesis conditions on the performance of the resulting TFC polyamide FO membranes. The influence of monomer concentrations (i.e., m-phenylenediamine (MPD) and trimesoyl chloride (TMC) concentrations) on the membrane separation properties as well as FO performance was systematically studied. A strong trade-off between the water permeability and salt rejection was observed, where increasing the TMC concentration or reducing the MPD concentration resulted in higher membrane permeability but lower salt rejection. In FO tests, membranes with poor salt rejection had severe solute reverse diffusion, which enhanced the internal concentration polarization (ICP). It was found that the FO water flux was governed by both the membrane water permeability and its solute rejection. For a membrane with higher water permeability but lower solute rejection, the reduced membrane frictional resistance was compensated by the simultaneously more severe solute-reverse-diffusion-induced ICP. The net effect on the FO water flux depends on the competition of these two opposing mechanisms. Under conditions where solute reverse diffusion may cause severe ICP (e.g., high draw solution concentration and high water flux level), membranes need be optimized to achieve a high salt rejection even if this is at the expense of lower water permeability. © 2011 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.subjectForward Osmosis (Fo)en_US
dc.subjectInterfacial Polymerizationen_US
dc.subjectInternal Concentration Polarization (Icp)en_US
dc.subjectMonomer Concentrationen_US
dc.subjectPolyamide Thin Film Composite (Pa Tfc)en_US
dc.subjectSolute Reverse Diffusionen_US
dc.titleInfluence of monomer concentrations on the performance of polyamide-based thin film composite forward osmosis membranesen_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.2011.07.034en_US
dc.identifier.scopuseid_2-s2.0-80052024057en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80052024057&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume381en_US
dc.identifier.issue1-2en_US
dc.identifier.spage110en_US
dc.identifier.epage117en_US
dc.identifier.isiWOS:000295564600012-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridWei, J=55360900400en_US
dc.identifier.scopusauthoridLiu, X=36064600700en_US
dc.identifier.scopusauthoridQiu, C=36019493600en_US
dc.identifier.scopusauthoridWang, R=35081334000en_US
dc.identifier.scopusauthoridTang, CY=35489259800en_US

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