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Article: Janus Polyvinylidene Fluoride Membrane with Extremely Opposite Wetting Surfaces via One Single-Step Unidirectional Segregation Strategy

TitleJanus Polyvinylidene Fluoride Membrane with Extremely Opposite Wetting Surfaces via One Single-Step Unidirectional Segregation Strategy
Authors
Issue Date2018
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/aamick
Citation
ACS Applied Materials & Interfaces, 2018, v. 10 n. 29, p. 24947-24954 How to Cite?
AbstractJanus membranes with asymmetric wettability have attracted intense attention in oil/water separation, membrane distillation, liquid/fog collection, liquid diode, etc. Facile manipulation of the paradoxical wetting/antiwetting property on opposite surfaces of a 2D membrane is challenging. Different from most postmodification methods, herein, we propose one single-step unidirectional segregation strategy to fabricate a polymeric Janus membrane with extremely opposite wetting surfaces showing almost a 150° contact angle difference for the first time. We achieved the unidirectional segregation of the hydrophilic copolymer poly(vinylpyrrolidone-vinyltriethoxysilane) in a polyvinylidene fluoride (PVDF) membrane during phase separation. A glycerol coating on the nonwoven fabric support locally limited the phase separation on the bottom surface, blocked the segregation of hydrophilic copolymer, and promoted the segregation to the top surface. Working collaboratively with the asymmetric micro-/nanostructure on both surfaces, the resulting Janus membrane exhibited a superhydrophilic top surface and a superhydrophobic bottom surface. The Janus PVDF membrane showed switchable separation performance and high separation efficiency for both oil-in-water emulsions and water-in-oil emulsions because of its anisotropic wettability compared with solely hydrophobic or hydrophilic PVDF membranes.
Persistent Identifierhttp://hdl.handle.net/10722/264042
ISSN
2017 Impact Factor: 8.097
2015 SCImago Journal Rankings: 2.381
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLi, T-
dc.contributor.authorLiu, F-
dc.contributor.authorZhang, S-
dc.contributor.authorLin, H-
dc.contributor.authorWang, J-
dc.contributor.authorTang, C-
dc.date.accessioned2018-10-22T07:48:36Z-
dc.date.available2018-10-22T07:48:36Z-
dc.date.issued2018-
dc.identifier.citationACS Applied Materials & Interfaces, 2018, v. 10 n. 29, p. 24947-24954-
dc.identifier.issn1944-8244-
dc.identifier.urihttp://hdl.handle.net/10722/264042-
dc.description.abstractJanus membranes with asymmetric wettability have attracted intense attention in oil/water separation, membrane distillation, liquid/fog collection, liquid diode, etc. Facile manipulation of the paradoxical wetting/antiwetting property on opposite surfaces of a 2D membrane is challenging. Different from most postmodification methods, herein, we propose one single-step unidirectional segregation strategy to fabricate a polymeric Janus membrane with extremely opposite wetting surfaces showing almost a 150° contact angle difference for the first time. We achieved the unidirectional segregation of the hydrophilic copolymer poly(vinylpyrrolidone-vinyltriethoxysilane) in a polyvinylidene fluoride (PVDF) membrane during phase separation. A glycerol coating on the nonwoven fabric support locally limited the phase separation on the bottom surface, blocked the segregation of hydrophilic copolymer, and promoted the segregation to the top surface. Working collaboratively with the asymmetric micro-/nanostructure on both surfaces, the resulting Janus membrane exhibited a superhydrophilic top surface and a superhydrophobic bottom surface. The Janus PVDF membrane showed switchable separation performance and high separation efficiency for both oil-in-water emulsions and water-in-oil emulsions because of its anisotropic wettability compared with solely hydrophobic or hydrophilic PVDF membranes.-
dc.languageeng-
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/aamick-
dc.relation.ispartofACS Applied Materials & Interfaces-
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://pubs.acs.org/page/policy/articlesonrequest/index.html-
dc.titleJanus Polyvinylidene Fluoride Membrane with Extremely Opposite Wetting Surfaces via One Single-Step Unidirectional Segregation Strategy-
dc.typeArticle-
dc.identifier.emailTang, C: tangc@hku.hk-
dc.identifier.authorityTang, C=rp01765-
dc.description.naturepostprint-
dc.identifier.doi10.1021/acsami.8b08278-
dc.identifier.hkuros295722-
dc.identifier.volume10-
dc.identifier.issue29-
dc.identifier.spage24947-
dc.identifier.epage24954-
dc.identifier.isiWOS:000440511900070-
dc.publisher.placeUnited States-

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