Low-damage preparation method of super-hydrophobic surface of industrial aluminum foil

Abstract

The invention provides a low-damage preparation method of a super-hydrophobic surface of an industrial aluminum foil. The method comprises the following steps of: firstly, ultrasonically cleaning the industrial aluminum foil with acetone and deionized water, blow-drying the industrial aluminum foil, then immerging the industrial aluminum foil into a NaOH water solution of which the concentration is 1mol / L to be processed for 30-60 seconds, then cleaning the industrial aluminum foil with ethanol and deionized water sequentially, and blow-drying the industrial aluminum foil for later use; soaking the preprocessed industrial aluminum foil in a prepared phosphoric acid and sodium fluoride mixed water solution, etching the industrial aluminum foil for 5 minutes in a water bath at the constant temperature of 70 DEG C, taking out the industrial aluminum foil, then cleaning the industrial aluminum foil with ethanol and deionized water, and blow-drying the industrial aluminum foil; and soaking the industrial aluminum foil processed by the mixed water solution in liquid stearic acid at 70 DEG C for 1 hour, then rinsing the industrial aluminum foil in hot ethanol at 70 DEG C, and finally curing the industrial aluminum foil in an oven at 80 DEG C for 30 minutes to obtain an industrial aluminum foil surface with super-hydrophobicity. The method provided by the invention is simple and convenient in operation, has low cost and small substrate damage, and is especially suitable for constructing thinner industrial aluminum foil surfaces with super-hydrophobicity.

Description

technical field [0001] The invention relates to a low-damage preparation method on the super-hydrophobic surface of industrial aluminum foil. Background technique [0002] Aluminum foil has the advantages of light weight, extensibility, and good electrical and thermal conductivity. Industrial aluminum foil is widely used in air-conditioning radiators, automobile radiators, cables and other fields. The surface of ordinary aluminum foil is hydrophilic, which is prone to problems such as condensation, corrosion, microbial contamination, and frosting. The superhydrophobic surface has the characteristics of anti-condensation, corrosion resistance, self-cleaning, anti-frosting, etc., which can significantly improve the performance of aluminum foil, and has important economic and social benefits. [0003] After years of development, a variety of methods for preparing superhydrophobic surfaces of aluminum and aluminum alloys have been reported, such as wet chemical etching, organic...

AI Technical Summary

Problems solved by technology

[0005] Some technologies obtain the rough structure required by the superhydrophobic surface through top-down etching, but the damage to the substrate is relatively large

For example, the wet chemical etching method mostly uses a solution containing hydrochloric acid and sodium hydroxide for etching. The reaction is more violent and difficult to control. When corroding aluminum foil, it is easy to penetrate in parts with residual stress and defects.

[0006] (2) The processing process is complex

[0007] Anodic oxidation is a common process for the surface treatment of aluminum and its alloys, but it needs to be combined with sandblasting, plasma treatment and other technologies to treat the surface of the sample to prepare a super-hydrophobic surface, and the process is relatively complicated.

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