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Title: Robust and superhydrophobic coating highly resistant to wear and efficient in water/oil separation
Author: Rius Ayra, Oriol
Castellote-Alvarez, Roger
Escobar Romero, Ana Maria
Llorca i Isern, Núria
Keywords: Superfícies hidrofòbiques
Deposició (Metal·lúrgia)
Hydrophobic surfaces
Issue Date: 25-Jan-2019
Publisher: Elsevier B.V.
Abstract: Here, we report a straightforward and rapid process using fatty acids to produce a stable superhydrophobic hybrid composite coating on aluminium substrate which is highly resistant to wear under environmental conditions. Furthermore, this novel superhydrophobic metal surface is highly efficient at separating of water/oil systems. The single-step process we adopt involves electrochemical deposition of ZnCl2, α-Al2O3 and lauric acid (C11H23COOH) onto commercial pure aluminium substrate. The resultant static contact angle (170°) and sliding angle (1°) are those of a superhydrophobic coating with self-cleaning properties; while chemical analysis shows that this is the result of generation of zinc laurate (Zn(C11H20COO)2) as a major compound that increases the superhydrophobic character of the coating, generating a flower-like structure 70 nm thick. Different wear tests show the coating is resistant to severe conditions, confirming its real potential against weathering, including sand and water erosion. Finally, a water/oil separation test determined 99% separation efficiency in hexane and ether petroleum systems, in a laboratory-made storage tank.
Note: Versió postprint del document publicat a:
It is part of: Surface & Coatings Technology, 2019, vol. 364, p. 330-340
Related resource:
ISSN: 0257-8972
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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