Superoleophobic Surfaces Obtained via Hierarchical Metallic Meshes

Hierarchical metallic surfaces demonstrating pronounced water and oil repellence are reported. The surfaces were manufactured with stainless-steel microporous meshes, which were etched with perfluorononanoic acid. As a result, a hierarchical relief was created, characterized by roughness at micro- a...

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Bibliographic Details
Published in:Langmuir 2016-05, Vol.32 (17), p.4134-4140
Main Authors: Grynyov, Roman, Bormashenko, Edward, Whyman, Gene, Bormashenko, Yelena, Musin, Albina, Pogreb, Roman, Starostin, Anton, Valtsifer, Viktor, Strelnikov, Vladimir, Schechter, Alex, Kolagatla, Srikanth
Format: Article
Language:English
Subjects:
Interfaces: Adsorption, Reactions, Films, Forces, Measurement Techniques, Charge Transfer, Electrochemistry, Electrocatalysis, Energy Production and Storage
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Summary:Hierarchical metallic surfaces demonstrating pronounced water and oil repellence are reported. The surfaces were manufactured with stainless-steel microporous meshes, which were etched with perfluorononanoic acid. As a result, a hierarchical relief was created, characterized by roughness at micro- and sub-microscales. Pronounced superoleophobicity was registered with regard to canola, castor, sesame, flax, crude (petroleum), and engine oils. Relatively high sliding angles were recorded for 5 μL turpentine, olive, and silicone oil droplets. The stability of the Cassie-like air trapping wetting state, established with water/ethanol solutions, is reported. The omniphobicity of the surfaces is due to the interplay of their hierarchical relief and surface fluorination.
ISSN:0743-7463
1520-5827
DOI:10.1021/acs.langmuir.6b00248