A method for superhydrophobicizing the surface of aluminum material

Abstract

The invention provides a novel surface super-hydrophobization method for an aluminum material (aluminum or an aluminum alloy). The method comprises the following steps of: polishing the aluminum material with metallographic abrasive paper, cleaning the polished aluminum material with acetone and ethanol and treating the washed aluminum material in boiling water; and putting the aluminum material into coupling agent-containing solution of toluene for reaction at the temperature of 80 DEG C for 4 to 8 hours, reacting the reaction product with solution of an end functional group polymer at the temperature of between 80 and 120 DEG C for 4 hours and cleaning and drying the reaction product to obtain a super-hydrophobization metal aluminum material of which the surface is grafted with a hydrophobic polymer layer, wherein the surface contact angle of the super-hydrophobization metal aluminum material is up to 150 to 157 degrees. An aluminum-based material used in the method is not limited by any crystal lattice and a prepared super-hydrophobic functional membrane is bonded with the surface of an aluminum substrate through a chemical bond, so that an obtained material with super-hydrophobic property has easily controlled quality and stable performance. A surface pre-treatment method and a surface coating method adopted by the aluminum substrate have the advantages of simple process, convenient operation, no need of complex and expensive equipment or long processing time, easy realization of industrialization and suitability for surface super-hydrophobic modification on large-area or specially-shaped or complex aluminum material parts.

Description

technical field [0001] The invention relates to surface treatment of metal substrates, in particular to a method for preparing superhydrophobic surfaces of metal aluminum materials. Background technique [0002] Superhydrophobic surface is one of the more active fields in surface science research and thin film preparation technology in recent years. The study of superhydrophobic surfaces is of great importance to the in-depth understanding of plants (such as lotus leaves, taro leaves and straw leaves, etc.) and animals (such as dolphins, sharks, whales, etc.) Thin films play an extremely important role. At the same time, it has a very broad application prospect in industrial production and people's daily life. [0003] Superhydrophobic surfaces generally refer to surfaces with a static contact angle greater than 150° with water droplets. Studies have found that this special wettability is determined by the surface microstructure of the material and the surface chemical com...

AI Technical Summary

Problems solved by technology

This method is cumbersome, requires a large oxidation current, and takes a long time to react with the inorganic salt solution

[0006] Among the currently commonly used methods mentioned above, the chemical etching method is simple and fast, but the disadvantage is that it is limited by the crystal lattice and the quality is difficult to control.

Electrochemical corrosion is easy to form a uniform nanostructure, but it needs to use expensive high-power power supply equipment and long processing time, which is not conducive to mass production

And generally all there is cost higher, is difficult to the practical problem of suitability for industrialized production

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