Wettability of Alumina Substrates with Micro-Morphology and Microstructure

Abstract:

A non-smooth surface with convex domes was fabricated on a chemical polished 2024 aluminum alloy substrate using the method of pressing with a symmetrically distributed concave hole module. Anode oxidation technique was used to prepare alumina films on a non-smooth surface. The as-prepared surfaces possessing microscale morphology and multiscale structures without anything chemical modification exhibited excellent hydrophobicity, and had a maximum water contact angle of about 133^o. The microscale morphology of the non-smooth alumina films were investigated by a stereo microscope and a laser scanning confocal microscopy. A scanning electron microscopy was used for surface corresponding microstructure of the non-smooth alumina films. The forming course of the alumina films with pores was analyzed. Such an alumina films that combine excellent hydrophobicity with other properties may have many potential applications.

• Periodical: Advanced Materials Research (Volumes 838-841)
• Pages: 166-169
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.838-841.166
• Online since: November 2013
• Authors: Jing Li, Feng Du, Qiang Li, Jin Kai Xu, Hua Dong Yu*
• Keywords: Alumina Films, Hydrophobicity, Microscale Morphology, Microstructure

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