Method for preparing super-amphiphobic aluminum surface

Abstract

The invention discloses a method for preparing a super-amphiphobic aluminum surface and belongs to the field of metal surface treatment. The method comprises the following steps: first, performing chemical etching on metal aluminum, so as to form a micron-sized rough structure on the surface of metal aluminum; then, performing water bath treatment on the etched sample, so as to form a petal-shaped nanometer structure on the micron-sized rough structure; and finally, performing low surface energy treatment to obtain the super-amphiphobic aluminum surface of which the water contact angle reaches up to 159.6 degrees, the rolling angle I is as low as 2 degrees, the oil contact angle is 154.8 degrees, and the rolling angle II is 7 degrees. The super-amphiphobic aluminum surface prepared according to the method is high in stability and corrosion resistance. Meanwhile, the method provided by the invention has the advantages that the process is simple; the cost is low; the cleanliness and the environmental protection are achieved; the limitation by the shape and the size of a substrate is avoided; and the industrialized production is easy to implement.

Description

technical field [0001] The invention relates to a method for preparing a superamphiphobic aluminum surface, belonging to the field of metal surface treatment. Background technique [0002] As the non-ferrous metal with the largest output in the world, aluminum is widely used in construction, packaging, aerospace, transportation and other fields. With the development of national economic construction and national defense technology industry, the performance requirements of aluminum metal are becoming more and more stringent. It has good corrosion resistance and drag reduction properties. Constructing aluminum surfaces with superamphiphobic properties is of great significance for further improving the application of metallic aluminum. [0003] A superamphiphobic surface refers to a surface on which water and oil droplets have a contact angle greater than 150° and a rolling angle less than 10°. The method of preparing a metal-based superamphiphobic surface is usually: first p...

AI Technical Summary

Problems solved by technology

However, the preparation process is relatively complicated, the product stability is poor, and it is difficult to achieve large-scale production

At present, the preparation process of most metal superamphiphobic surfaces is relatively complicated, often requiring the use of strong corrosive chemicals such as hydrochloric acid and sodium hydroxide, and the prepared superamphiphobic surfaces generally have the problem of poor stability.

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