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Article: Immobilization of sulfonated polysulfone via 2D LDH nanosheets during phase-inversion: A novel strategy towards greener membrane synthesis and enhanced desalination performance

TitleImmobilization of sulfonated polysulfone via 2D LDH nanosheets during phase-inversion: A novel strategy towards greener membrane synthesis and enhanced desalination performance
Authors
KeywordsThin-film composite membranes
Layered double hydroxide
Sulfonated polysulfone
Desalination
Issue Date2020
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci
Citation
Journal of Membrane Science, 2020, v. 614, p. article no. 118508 How to Cite?
AbstractSulfonated polysulfone (sPSf) is a commonly used hydrophilic additive to polysulfone (PSf) substrates for preparing polyamide membranes with enhancement desalination performance. However, severe leaching of water-soluble sPSf into the coagulation water bath during substrate formation can lead to weakened mechanical strength of the substrate, loss of the expensive sPSf polymer, and potential environmental pollution. In this study, we report a novel and efficient strategy to “anchor” sPSf in the PSf matrix by using 2D layered double hydroxide (LDH) nanosheets. LDH nanosheets effectively immobilized sPSf due to their electrostatic interaction, resulting in greener membrane synthesis. Substrates modified with LDH anchored sPSf (PSf/sPSf5-LDHx) exhibited enhanced mechanical strength and water permeability compared to the pristine PSf substrate as well as the sPSf-blended substrates (sPSf/sPSf5). Interfacial polymerization on the PSf/sPSf5-LDHx substrate resulted in a polyamide rejection film containing more extensive nanovoids and thus greater effective filtration area, which enhanced water permeability without major loss of salt rejection. In forward osmosis tests, this novel membrane enjoyed an additional advantage of less severe internal concentration polarization, as reflected by its significantly reduced structural parameter.
Persistent Identifierhttp://hdl.handle.net/10722/306355
ISSN
2023 Impact Factor: 8.4
2023 SCImago Journal Rankings: 1.848
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLu, P-
dc.contributor.authorWang, Y-
dc.contributor.authorWang, L-
dc.contributor.authorWei, Y-
dc.contributor.authorLi, W-
dc.contributor.authorLi, Y-
dc.contributor.authorTang, C-
dc.date.accessioned2021-10-20T10:22:27Z-
dc.date.available2021-10-20T10:22:27Z-
dc.date.issued2020-
dc.identifier.citationJournal of Membrane Science, 2020, v. 614, p. article no. 118508-
dc.identifier.issn0376-7388-
dc.identifier.urihttp://hdl.handle.net/10722/306355-
dc.description.abstractSulfonated polysulfone (sPSf) is a commonly used hydrophilic additive to polysulfone (PSf) substrates for preparing polyamide membranes with enhancement desalination performance. However, severe leaching of water-soluble sPSf into the coagulation water bath during substrate formation can lead to weakened mechanical strength of the substrate, loss of the expensive sPSf polymer, and potential environmental pollution. In this study, we report a novel and efficient strategy to “anchor” sPSf in the PSf matrix by using 2D layered double hydroxide (LDH) nanosheets. LDH nanosheets effectively immobilized sPSf due to their electrostatic interaction, resulting in greener membrane synthesis. Substrates modified with LDH anchored sPSf (PSf/sPSf5-LDHx) exhibited enhanced mechanical strength and water permeability compared to the pristine PSf substrate as well as the sPSf-blended substrates (sPSf/sPSf5). Interfacial polymerization on the PSf/sPSf5-LDHx substrate resulted in a polyamide rejection film containing more extensive nanovoids and thus greater effective filtration area, which enhanced water permeability without major loss of salt rejection. In forward osmosis tests, this novel membrane enjoyed an additional advantage of less severe internal concentration polarization, as reflected by its significantly reduced structural parameter.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci-
dc.relation.ispartofJournal of Membrane Science-
dc.subjectThin-film composite membranes-
dc.subjectLayered double hydroxide-
dc.subjectSulfonated polysulfone-
dc.subjectDesalination-
dc.titleImmobilization of sulfonated polysulfone via 2D LDH nanosheets during phase-inversion: A novel strategy towards greener membrane synthesis and enhanced desalination performance-
dc.typeArticle-
dc.identifier.emailTang, C: tangc@hku.hk-
dc.identifier.authorityTang, C=rp01765-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.memsci.2020.118508-
dc.identifier.scopuseid_2-s2.0-85089361923-
dc.identifier.hkuros326729-
dc.identifier.volume614-
dc.identifier.spagearticle no. 118508-
dc.identifier.epagearticle no. 118508-
dc.identifier.isiWOS:000567418900001-
dc.publisher.placeNetherlands-

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