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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
Title | Mesoporous silica gel-based mixed matrix membranes for improving mass transfer in forward osmosis: Effect of pore size of filler |
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Authors | |
Issue Date | 2015 |
Publisher | Nature 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? |
Abstract | The 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 Identifier | http://hdl.handle.net/10722/264577 |
ISSN | 2023 Impact Factor: 3.8 2023 SCImago Journal Rankings: 0.900 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Lee, JY | - |
dc.contributor.author | Wang, YN | - |
dc.contributor.author | Tang, C | - |
dc.contributor.author | Huo, FW | - |
dc.date.accessioned | 2018-10-22T07:57:16Z | - |
dc.date.available | 2018-10-22T07:57:16Z | - |
dc.date.issued | 2015 | - |
dc.identifier.citation | Scientific Reports, 2015, v. 5, p. Article no. 16808 | - |
dc.identifier.issn | 2045-2322 | - |
dc.identifier.uri | http://hdl.handle.net/10722/264577 | - |
dc.description.abstract | The 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.language | eng | - |
dc.publisher | Nature Publishing Group: Open Access Journals - Option C. The Journal's web site is located at http://www.nature.com/srep/index.html | - |
dc.relation.ispartof | Scientific Reports | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.title | Mesoporous silica gel-based mixed matrix membranes for improving mass transfer in forward osmosis: Effect of pore size of filler | - |
dc.type | Article | - |
dc.identifier.email | Tang, C: tangc@hku.hk | - |
dc.identifier.authority | Tang, C=rp01765 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1038/srep16808 | - |
dc.identifier.scopus | eid_2-s2.0-84947968624 | - |
dc.identifier.hkuros | 295729 | - |
dc.identifier.volume | 5 | - |
dc.identifier.spage | Article no. 16808 | - |
dc.identifier.epage | Article no. 16808 | - |
dc.identifier.isi | WOS:000365086000001 | - |
dc.publisher.place | United Kingdom | - |
dc.identifier.issnl | 2045-2322 | - |