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Article: Vacuum-assisted MPD loading toward promoted nanoscale structure and enhanced water permeance of polyamide RO membrane

TitleVacuum-assisted MPD loading toward promoted nanoscale structure and enhanced water permeance of polyamide RO membrane
Authors
Issue Date2022
Citation
Separation and Purification Technology, 2022, v. 297, p. 121547 How to Cite?
AbstractThin-film composite (TFC) reverse osmosis (RO) membranes fabricated by interfacial polymerization (IP) have been widely applied in seawater desalination. Nevertheless, their separation performance is limited by the permeance-selectivity upper bound. Compared to conventional synthesis/modification techniques, the manipulation of amine monomer distribution for the IP reaction has been far less investigated. In this study, we systematically investigated three classical approaches for m-phenylenediamine (MPD) loading during the IP reaction, i.e., vacuum filtration (TFC-V), roller (TFC-R), and air gun (TFC-A). Our results suggested that the vacuum-assisted approach can greatly enhance the availability of MPD monomers, which could, in turn, result in enhanced “ridge-and-valley” morphology of the polyamide rejection layer as a result of the enhanced nanofoaming effect. Furthermore, the TFC-V membrane demonstrated the highest water permeance of 2.8 ± 0.4 L m-2 h−1 bar−1 compared to TFC-R and TFC-A membranes of 2.1 ± 0.2 L m-2 h−1 bar−1 and 2.1 ± 0.4 L m-2 h−1 bar−1, respectively. This study provided mechanistic insights to facilitate an improved understanding of membrane synthesis–structure–performance relationships.
Persistent Identifierhttp://hdl.handle.net/10722/314687
ISSN
2023 Impact Factor: 8.1
2023 SCImago Journal Rankings: 1.533
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWu, S-
dc.contributor.authorWang, F-
dc.contributor.authorZhou, S-
dc.contributor.authorLong, L-
dc.contributor.authorYang, Z-
dc.contributor.authorTang, C-
dc.date.accessioned2022-08-05T09:32:47Z-
dc.date.available2022-08-05T09:32:47Z-
dc.date.issued2022-
dc.identifier.citationSeparation and Purification Technology, 2022, v. 297, p. 121547-
dc.identifier.issn1383-5866-
dc.identifier.urihttp://hdl.handle.net/10722/314687-
dc.description.abstractThin-film composite (TFC) reverse osmosis (RO) membranes fabricated by interfacial polymerization (IP) have been widely applied in seawater desalination. Nevertheless, their separation performance is limited by the permeance-selectivity upper bound. Compared to conventional synthesis/modification techniques, the manipulation of amine monomer distribution for the IP reaction has been far less investigated. In this study, we systematically investigated three classical approaches for m-phenylenediamine (MPD) loading during the IP reaction, i.e., vacuum filtration (TFC-V), roller (TFC-R), and air gun (TFC-A). Our results suggested that the vacuum-assisted approach can greatly enhance the availability of MPD monomers, which could, in turn, result in enhanced “ridge-and-valley” morphology of the polyamide rejection layer as a result of the enhanced nanofoaming effect. Furthermore, the TFC-V membrane demonstrated the highest water permeance of 2.8 ± 0.4 L m-2 h−1 bar−1 compared to TFC-R and TFC-A membranes of 2.1 ± 0.2 L m-2 h−1 bar−1 and 2.1 ± 0.4 L m-2 h−1 bar−1, respectively. This study provided mechanistic insights to facilitate an improved understanding of membrane synthesis–structure–performance relationships.-
dc.languageeng-
dc.relation.ispartofSeparation and Purification Technology-
dc.titleVacuum-assisted MPD loading toward promoted nanoscale structure and enhanced water permeance of polyamide RO membrane-
dc.typeArticle-
dc.identifier.emailYang, Z: zheyang8@hku.hk-
dc.identifier.emailTang, C: tangc@hku.hk-
dc.identifier.authorityYang, Z=rp02847-
dc.identifier.authorityTang, C=rp01765-
dc.identifier.doi10.1016/j.seppur.2022.121547-
dc.identifier.hkuros334780-
dc.identifier.volume297-
dc.identifier.spage121547-
dc.identifier.epage121547-
dc.identifier.isiWOS:000822628700001-

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