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Article: Solvent-thermal induced roughening: A novel and versatile method to prepare superhydrophobic membranes

TitleSolvent-thermal induced roughening: A novel and versatile method to prepare superhydrophobic membranes
Authors
KeywordsMembrane distillation
Polyvinylidene fluoride
Solvent-thermal treatment
Superhydrophobic membrane
Surface roughness enhancement
Issue Date2018
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/memsci
Citation
Journal of Membrane Science, 2018, v. 564, p. 465-472 How to Cite?
AbstractSurface roughness enhancement by fabricating multi-scale nano/microstructure is an effective strategy to prepare superhydrophobic membranes. Here we report a novel solvent-thermal induced roughening (STIR) method. The method involves the swelling of a polymer surface to create a soft shell/hard core structure under the combined action of solvent and heating, followed by a controllable surface roughening as a result of mismatched thermal expansion between the shell and the core. We show a significant increase of surface roughness for a STIR-treated polyvinylidene fluoride nanofibrous membrane, whose nanofibers were covered with densely-packed nanofins. The treated membrane had greatly enhanced hydrophobicity, resulting in improved anti-wetting performance to low-surface-tension feed water in a membrane distillation process. The STIR method was capable of treating membranes with various pore structures. The novel surface roughening strategy opens up new directions to fabricate superhydrophobic surfaces and membranes, which can greatly benefit a wide range of applications such as membrane distillation, oil/water separation. © 2018 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/264035
ISSN
2019 Impact Factor: 7.183
2015 SCImago Journal Rankings: 2.042
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorQing, W-
dc.contributor.authorShi, X-
dc.contributor.authorZhang, W-
dc.contributor.authorWang, J-
dc.contributor.authorWu, Y-
dc.contributor.authorWang, P-
dc.contributor.authorTang, C-
dc.date.accessioned2018-10-22T07:48:28Z-
dc.date.available2018-10-22T07:48:28Z-
dc.date.issued2018-
dc.identifier.citationJournal of Membrane Science, 2018, v. 564, p. 465-472-
dc.identifier.issn0376-7388-
dc.identifier.urihttp://hdl.handle.net/10722/264035-
dc.description.abstractSurface roughness enhancement by fabricating multi-scale nano/microstructure is an effective strategy to prepare superhydrophobic membranes. Here we report a novel solvent-thermal induced roughening (STIR) method. The method involves the swelling of a polymer surface to create a soft shell/hard core structure under the combined action of solvent and heating, followed by a controllable surface roughening as a result of mismatched thermal expansion between the shell and the core. We show a significant increase of surface roughness for a STIR-treated polyvinylidene fluoride nanofibrous membrane, whose nanofibers were covered with densely-packed nanofins. The treated membrane had greatly enhanced hydrophobicity, resulting in improved anti-wetting performance to low-surface-tension feed water in a membrane distillation process. The STIR method was capable of treating membranes with various pore structures. The novel surface roughening strategy opens up new directions to fabricate superhydrophobic surfaces and membranes, which can greatly benefit a wide range of applications such as membrane distillation, oil/water separation. © 2018 Elsevier B.V.-
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.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectMembrane distillation-
dc.subjectPolyvinylidene fluoride-
dc.subjectSolvent-thermal treatment-
dc.subjectSuperhydrophobic membrane-
dc.subjectSurface roughness enhancement-
dc.titleSolvent-thermal induced roughening: A novel and versatile method to prepare superhydrophobic membranes-
dc.typeArticle-
dc.identifier.emailQing, W: qingwh@hku.hk-
dc.identifier.emailWu, Y: kriswu@HKUCC-COM.hku.hk-
dc.identifier.emailTang, C: tangc@hku.hk-
dc.identifier.authorityTang, C=rp01765-
dc.description.naturepostprint-
dc.identifier.doi10.1016/j.memsci.2018.07.035-
dc.identifier.scopuseid_2-s2.0-85050540471-
dc.identifier.hkuros295709-
dc.identifier.volume564-
dc.identifier.spage465-
dc.identifier.epage472-
dc.identifier.isiWOS:000442653900047-
dc.publisher.placeNetherlands-
dc.identifier.issnl0376-7388-

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