Study of Super Hydrophobic Films on Pre-Sensitized Plate Aluminium Substrate

Abstract:

A simple chemical etching method was developed for corrosion of the pre-sensitized plate aluminium substrate in order to be a rough surface. After the chemical etched surface was treated with fluorination, the pre-sensitized (PS) plate aluminium (Al) substrate surface exhibits a super-hydrophobic property. The effects of the etching time and the etchant concentration on the super-hydrophobici were investigated, and the results show the contact angle of hydrofluoric firstly increases then reduce with acid etching time increasing, and the optimum etching time is 12 min; the contact angle of hydrofluoric firstly increases then reduce with acid etchant concentration increasing, and the optimum etchant concentration is 3 mol /L. When the contact angle increases, the droplet and solid surface tension increases. Film base fine structure of the rough surface is the key to the formation of hydrophobic.

• Periodical: Applied Mechanics and Materials (Volume 200)
• Pages: 427-429
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.200.427
• Online since: October 2012
• Authors: Zhuang Liu, Lin Zhu, Jing Lin, Zhi Hui Sun
• Keywords: Chemical Etching, Contact Angle (CA), Superhydrophobic

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