Electrostatic spraying method for preparing copper substrate super-hydrophobic surface

Abstract

The invention provides a method for preparing a copper substrate super-hydrophobic surface through an electrostatic spraying method. The method mainly comprises the steps that firstly, a super-hydrophobic material is prepared; 2, pretreating the copper substrate; thirdly, the copper substrate treated in the second step is subjected to surface roughening treatment; fourthly, the super-hydrophobic material prepared in the first step and a curing agent are mixed according to different proportions (1: 3, 1: 4 and 1: 5) through an electrostatic spraying machine, and the mixture is sprayed on a copper substrate; and fifthly, the sprayed copper substrate is put into a drying oven to be cured. A layer of hydrophobic structure similar to a lotus leaf surface is obtained on the surface of a copper substrate through a simple electrostatic spraying method, when the mixing ratio is 1: 5, the prepared super-hydrophobic surface is stable in performance, a uniform coating of a micro-nano composite hierarchical coarse structure is formed on the surface, and the contact angle reaches 153.4 degrees.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of metal substrates, and in particular relates to a preparation method of a copper-based superhydrophobic surface structure. Background technique [0002] Superhydrophobic surfaces have the advantages of anti-icing, anti-corrosion and self-cleaning, and reduced flow resistance. Currently, chemical methods, hydrothermal methods, and electrodeposition methods are commonly used to prepare superhydrophobic surfaces. However, most of the superhydrophobic materials prepared by the existing methods and routes still have the problems of poor mechanical durability and chemical stability, which largely restrict their development in the field of scientific research and practical application. [0003] Electrostatic spraying methods are compared to these methods. The electrostatic spraying method is to disperse the prepared reagents into micron and nanoscale small particles by the action of a spr...

AI Technical Summary

Problems solved by technology

However, most superhydrophobic materials prepared by existing methods and routes still have poor mechanical durability and chemical stability, which largely restricts their development in the field of scientific research and practical application.

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