Electrochemical method for preparing superhydrophobic surface on copper substrates by using aqueous electrolyte

Abstract

The invention discloses an electrochemical method for preparing a superhydrophobic surface on copper substrates by using an aqueous electrolyte. The method comprises the steps of: I, dissolving potassium hydroxide and potassium peroxydisulfate into distilled water to obtain a solution A; II, dissolving tetradecanoic acid into anhydrous ethanol to obtain a solution B; III, polishing the two copper substrates by using waterproof abrasive paper, then cleanly washing the two copper substrates by sequentially using the distilled water and the anhydrous ethanol, and drying for later use; IV, placing the solution A, as an electrolyte, into an electrolytic cell, and utilizing the two dried copper substrates as an anode and a cathode respectively to electrolyze; and V, cleanly washing the electrolyzed anode copper substrate by sequentially using the distilled water and the anhydrous ethanol, then uniformly smearing the solution B to a surface of the cleanly washed anode copper substrate, and airing to obtain the copper substrates with the super-hydrophobic surface. A contact angle of the super-hydrophobic surface prepared on the copper substrates by using the method can reach more than 152 degrees, and the super-hydrophobic performance keeps stable after the copper substrates are placed in a normal condition for one year.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to an electrochemical method for preparing a superhydrophobic surface on a copper substrate by using a water electrolyte. Background technique [0002] Many plants in nature, such as lotus leaves, exhibit extraordinary superhydrophobic properties, with contact angles as high as 150° and rolling angles below 3°. Inspired by this, researchers have carried out research on superhydrophobic properties, and this direction has developed into a research hotspot in surface science. It was found that the superhydrophobic properties mainly depend on the chemical composition and microstructure. Generally, superhydrophobic surfaces are constructed by modifying low surface energy substances on rough surfaces or constructing rough structures on the surface of superhydrophobic materials. At present, the preparation methods mainly include electrodeposition, chemical vapor deposition, ...

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Problems solved by technology

At present, the preparation methods mainly include electrodeposition, chemical vapor deposition, plasma etching, anodic oxidation, chemical corrosion, laser treatment, electrospinning, sol-gel, etc. However, these methods still have some disadvantages, such as expensive The materials, complex process control and the need to use templates have seriously hindered its large-scale application in engineering.

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