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Article: Superwettability with antithetic states: fluid repellency in immiscible liquids

TitleSuperwettability with antithetic states: fluid repellency in immiscible liquids
Authors
KeywordsAnisotropy
Gas oils
Hydrophobicity
Liquids
Wetting
Issue Date2018
PublisherRSC Publications. The Journal's web site is located at http://www.rsc.org/publishing/journals/mh/about.asp
Citation
Materials Horizons, 2018, v. 5 n. 6, p. 1156-1165 How to Cite?
AbstractA surface repels a fluid in an immiscible liquid when it stabilizes the former at a non-wetted Cassie state and the latter at a fully-wetted Wenzel state. Chemically, this occurs only when the former non-wets and the latter wets the surface. Here, we report the removal of the long-standing chemical constraints by harmonizing the antithetic states with rationally-designed anisotropic surface topology so that the super-repellency can appear in virtually any two-fluid system. Inspired by the 3D multi-layered structures of diatom frustules, our surface texture design introduces the required direction-dependent energetic barriers to create and stabilize the Cassie and Wenzel states, respectively. The multi-layered cage structure is found to be the best in achieving under-liquid repellency. We fabricate the required surface architecture by the microfluidics method and show experimentally its super-repellency of gas, water, and oils in all six types of fluid–liquid systems with a single micro-cage surface. Such super-repellent surfaces would be important in various fields that involve multiple fluids and anisotropic solid–liquid interactions. ER
Persistent Identifierhttp://hdl.handle.net/10722/272922
ISSN
2017 Impact Factor: 13.183

 

DC FieldValueLanguage
dc.contributor.authorZhu, P-
dc.contributor.authorKong, T-
dc.contributor.authorTian, Y-
dc.contributor.authorTang, X-
dc.contributor.authorTian, X-
dc.contributor.authorWang, L-
dc.date.accessioned2019-08-06T09:19:07Z-
dc.date.available2019-08-06T09:19:07Z-
dc.date.issued2018-
dc.identifier.citationMaterials Horizons, 2018, v. 5 n. 6, p. 1156-1165-
dc.identifier.issn2051-6347-
dc.identifier.urihttp://hdl.handle.net/10722/272922-
dc.description.abstractA surface repels a fluid in an immiscible liquid when it stabilizes the former at a non-wetted Cassie state and the latter at a fully-wetted Wenzel state. Chemically, this occurs only when the former non-wets and the latter wets the surface. Here, we report the removal of the long-standing chemical constraints by harmonizing the antithetic states with rationally-designed anisotropic surface topology so that the super-repellency can appear in virtually any two-fluid system. Inspired by the 3D multi-layered structures of diatom frustules, our surface texture design introduces the required direction-dependent energetic barriers to create and stabilize the Cassie and Wenzel states, respectively. The multi-layered cage structure is found to be the best in achieving under-liquid repellency. We fabricate the required surface architecture by the microfluidics method and show experimentally its super-repellency of gas, water, and oils in all six types of fluid–liquid systems with a single micro-cage surface. Such super-repellent surfaces would be important in various fields that involve multiple fluids and anisotropic solid–liquid interactions. ER-
dc.languageeng-
dc.publisherRSC Publications. The Journal's web site is located at http://www.rsc.org/publishing/journals/mh/about.asp-
dc.relation.ispartofMaterials Horizons-
dc.subjectAnisotropy-
dc.subjectGas oils-
dc.subjectHydrophobicity-
dc.subjectLiquids-
dc.subjectWetting-
dc.titleSuperwettability with antithetic states: fluid repellency in immiscible liquids-
dc.typeArticle-
dc.identifier.emailZhu, P: pazhu@hku.hk-
dc.identifier.emailWang, L: lqwang@hku.hk-
dc.identifier.authorityWang, L=rp00184-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1039/C8MH00964C-
dc.identifier.scopuseid_2-s2.0-85055800645-
dc.identifier.hkuros300442-
dc.identifier.hkuros301680-
dc.identifier.volume5-
dc.identifier.issue6-
dc.identifier.spage1156-
dc.identifier.epage1165-
dc.publisher.placeUnited Kingdom-

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