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- Publisher Website: 10.1016/j.memsci.2011.07.034
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Article: Influence of monomer concentrations on the performance of polyamide-based thin film composite forward osmosis membranes
Title | Influence of monomer concentrations on the performance of polyamide-based thin film composite forward osmosis membranes |
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Authors | |
Keywords | Forward Osmosis (Fo) Interfacial Polymerization Internal Concentration Polarization (Icp) Monomer Concentration Polyamide Thin Film Composite (Pa Tfc) Solute Reverse Diffusion |
Issue Date | 2011 |
Publisher | Elsevier 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? |
Abstract | Polyamide 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 Identifier | http://hdl.handle.net/10722/185406 |
ISSN | 2023 Impact Factor: 8.4 2023 SCImago Journal Rankings: 1.848 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Wei, J | en_US |
dc.contributor.author | Liu, X | en_US |
dc.contributor.author | Qiu, C | en_US |
dc.contributor.author | Wang, R | en_US |
dc.contributor.author | Tang, CY | en_US |
dc.date.accessioned | 2013-07-30T07:32:19Z | - |
dc.date.available | 2013-07-30T07:32:19Z | - |
dc.date.issued | 2011 | en_US |
dc.identifier.citation | Journal Of Membrane Science, 2011, v. 381 n. 1-2, p. 110-117 | en_US |
dc.identifier.issn | 0376-7388 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/185406 | - |
dc.description.abstract | Polyamide 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.language | eng | en_US |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci | en_US |
dc.relation.ispartof | Journal of Membrane Science | en_US |
dc.subject | Forward Osmosis (Fo) | en_US |
dc.subject | Interfacial Polymerization | en_US |
dc.subject | Internal Concentration Polarization (Icp) | en_US |
dc.subject | Monomer Concentration | en_US |
dc.subject | Polyamide Thin Film Composite (Pa Tfc) | en_US |
dc.subject | Solute Reverse Diffusion | en_US |
dc.title | Influence of monomer concentrations on the performance of polyamide-based thin film composite forward osmosis membranes | en_US |
dc.type | Article | en_US |
dc.identifier.email | Tang, CY: tangc@hku.hk | en_US |
dc.identifier.authority | Tang, CY=rp01765 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1016/j.memsci.2011.07.034 | en_US |
dc.identifier.scopus | eid_2-s2.0-80052024057 | en_US |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-80052024057&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 381 | en_US |
dc.identifier.issue | 1-2 | en_US |
dc.identifier.spage | 110 | en_US |
dc.identifier.epage | 117 | en_US |
dc.identifier.isi | WOS:000295564600012 | - |
dc.publisher.place | Netherlands | en_US |
dc.identifier.scopusauthorid | Wei, J=55360900400 | en_US |
dc.identifier.scopusauthorid | Liu, X=36064600700 | en_US |
dc.identifier.scopusauthorid | Qiu, C=36019493600 | en_US |
dc.identifier.scopusauthorid | Wang, R=35081334000 | en_US |
dc.identifier.scopusauthorid | Tang, CY=35489259800 | en_US |
dc.identifier.issnl | 0376-7388 | - |