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Article: Mesoporous silica gel-based mixed matrix membranes for improving mass transfer in forward osmosis: Effect of pore size of filler

TitleMesoporous silica gel-based mixed matrix membranes for improving mass transfer in forward osmosis: Effect of pore size of filler
Authors
Issue Date2015
PublisherNature Publishing Group: Open Access Journals - Option C. The Journal's web site is located at http://www.nature.com/srep/index.html
Citation
Scientific Reports, 2015, v. 5, p. Article no. 16808 How to Cite?
AbstractThe efficiency of forward osmosis (FO) process is generally limited by the internal concentration polarization (ICP) of solutes inside its porous substrate. In this study, mesoporous silica gel (SG) with nominal pore size ranging from 4-30 nm was used as fillers to prepare SG-based mixed matrix substrates. The resulting mixed matrix membranes had significantly reduced structural parameter and enhanced membrane water permeability as a result of the improved surface porosity of the substrates. An optimal filler pore size of ∼9 nm was observed. This is in direct contrast to the case of thin film nanocomposite membranes, where microporous nanoparticle fillers are loaded to the membrane rejection layer and are designed in such a way that these fillers are able to retain solutes while allowing water to permeate through them. In the current study, the mesoporous fillers are designed as channels to both water and solute molecules. FO performance was enhanced at increasing filler pore size up to 9 nm due to the lower hydraulic resistance of the fillers. Nevertheless, further increasing filler pore size to 30 nm was accompanied with reduced FO efficiency, which can be attributed to the intrusion of polymer dope into the filler pores.
Persistent Identifierhttp://hdl.handle.net/10722/264577
ISSN
2017 Impact Factor: 4.122
2015 SCImago Journal Rankings: 2.073
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLee, JY-
dc.contributor.authorWang, YN-
dc.contributor.authorTang, C-
dc.contributor.authorHuo, FW-
dc.date.accessioned2018-10-22T07:57:16Z-
dc.date.available2018-10-22T07:57:16Z-
dc.date.issued2015-
dc.identifier.citationScientific Reports, 2015, v. 5, p. Article no. 16808-
dc.identifier.issn2045-2322-
dc.identifier.urihttp://hdl.handle.net/10722/264577-
dc.description.abstractThe efficiency of forward osmosis (FO) process is generally limited by the internal concentration polarization (ICP) of solutes inside its porous substrate. In this study, mesoporous silica gel (SG) with nominal pore size ranging from 4-30 nm was used as fillers to prepare SG-based mixed matrix substrates. The resulting mixed matrix membranes had significantly reduced structural parameter and enhanced membrane water permeability as a result of the improved surface porosity of the substrates. An optimal filler pore size of ∼9 nm was observed. This is in direct contrast to the case of thin film nanocomposite membranes, where microporous nanoparticle fillers are loaded to the membrane rejection layer and are designed in such a way that these fillers are able to retain solutes while allowing water to permeate through them. In the current study, the mesoporous fillers are designed as channels to both water and solute molecules. FO performance was enhanced at increasing filler pore size up to 9 nm due to the lower hydraulic resistance of the fillers. Nevertheless, further increasing filler pore size to 30 nm was accompanied with reduced FO efficiency, which can be attributed to the intrusion of polymer dope into the filler pores.-
dc.languageeng-
dc.publisherNature Publishing Group: Open Access Journals - Option C. The Journal's web site is located at http://www.nature.com/srep/index.html-
dc.relation.ispartofScientific Reports-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleMesoporous silica gel-based mixed matrix membranes for improving mass transfer in forward osmosis: Effect of pore size of filler-
dc.typeArticle-
dc.identifier.emailTang, C: tangc@hku.hk-
dc.identifier.authorityTang, C=rp01765-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1038/srep16808-
dc.identifier.scopuseid_2-s2.0-84947968624-
dc.identifier.hkuros295729-
dc.identifier.volume5-
dc.identifier.spageArticle no. 16808-
dc.identifier.epageArticle no. 16808-
dc.identifier.isiWOS:000365086000001-
dc.publisher.placeUnited Kingdom-

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