Universität zu Köln

Schmidt-Verma, Anna K., Renner, Alexander M., Wilhelm, Michael, Bohr, Christoph, Goenuellue, Yakup, Rudigier-Voigt, Eveline and Mathur, Sanjay . High-Temperature Ultrahydrophobic Ceramic Coatings from Surface-Functionalized MgAl(2)O(4)Nanoparticles. Adv. Eng. Mater.. WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 1527-2648

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Abstract

Innovative coatings that can shield functional surfaces from environmental and temperature impact are essential to increase the life time of devices and reduce the maintenance costs. Superhydrophobic ceramic coatings with self-cleaning properties and stability at high-temperatures (up to 300 degrees C) are eco-friendly alternative to aggressive surface-cleaning agents. Despite the wide range of possible applications for hydrophobic surfaces, the practical implementation of currently used polymeric fluoro-silanes is restricted by their low thermal stability, which is an essential figure of merit. Herein, a nonadhesive coating with an exceptionally low surface-energy (contact angle approximate to 180 degrees) is developed by chemical conjugation of MgAl(2)O(4)spinel nanoparticles (NPs) with perfluorodecyltrichlorosilane (FDTS). The cross-conjugation of FDTS and MgAl(2)O(4)is substantiated by condensation reactions between the surface-rooted hydroxyl groups and chloride ligands of fluorosilane. Compared with the coatings based on pure fluorosilanes, the FDTS@MgAl(2)O(4)core-shell particles unify optical transparency and high-temperature stability imparted by spinel reinforcement with the superhydrophobicity induced by FDTS periphery. Addition of TiO(2)NPs to MgAl(2)O(4)sol unifies the ultrahydrophobicity of FDTS@MgAl(2)O(4)with UV-absorption properties of TiO(2)to produce a new UV- and temperature-resistant ultrahydrophobic coating system.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Schmidt-Verma, Anna K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Renner, Alexander M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wilhelm, Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED Bohr, Christoph UNSPECIFIED UNSPECIFIED UNSPECIFIED Goenuellue, Yakup UNSPECIFIED UNSPECIFIED UNSPECIFIED Rudigier-Voigt, Eveline UNSPECIFIED UNSPECIFIED UNSPECIFIED Mathur, Sanjay UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-319682
DOI:	10.1002/adem.202000738
Journal or Publication Title:	Adv. Eng. Mater.
Publisher:	WILEY-V C H VERLAG GMBH
Place of Publication:	WEINHEIM
ISSN:	1527-2648
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Chemistry > Institute of Inorganic Chemistry
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SUPERHYDROPHOBIC SURFACES; TRANSPARENT; MGAL2O4; ALUMINUM; FILMS; XPS Multiple languages Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/31968