Copper surface gradient wetting self-assembly film and preparation method thereof

Abstract

The invention discloses a preparation method of a copper surface gradient wetting self-assembly film. The method comprises the steps of (1), depositing a layer of Cu(OH)2 precursor on the surface of copper through electrochemical deposition, (2), generating a layer of black CuO on the surface of sheet copper subjected to electrodeposition and high-temperature dehydration, and (3) adopting self-assembly method to gradually drip fatty acid ethanol solution with the concentration being 0.05mmol / L to 0.5mmol / L to the sheet copper obtained at step (2), and then flushing the sheet copper with absolute ethyl alcohol after 1 to 10min dripping, so as to obtain the copper surface gradient wetting self-assembly film after air drying at room temperature. Compared with the traditional method of plating noble metal of gold and silver on a substrate, the method has the advantages that simple electrochemical plating is only required to be performed on the substrate and then a required substrate for self-assembly can be obtained after dehydration treatment; and the electrochemical deposition has the advantages that the cost of raw material is low, the raw material can be reused, arrays of prepared CuO are uniform and stable, the technological process is simple, the preparation time is short, and the like.

Description

technical field [0001] The invention relates to a gradient wetting self-assembly film and a preparation method thereof, in particular to a gradient wetting self-assembly film on a copper surface and a preparation method thereof. Background technique [0002] Gradient wettability material is a material whose surface physical and chemical properties change continuously along the direction parallel to the surface through the continuous change of surface topography and surface chemical composition. Generally, according to the nature of the gradient property change, it can be divided into two types: chemical composition gradient surface and microstructure gradient surface. In recent years, surface wettability gradient materials have been widely used in the fields of biocompatibility, diagnostics, nanotribology, microfluidics, liquid self-transport, etc., especially in promoting liquid droplet and microfluidic migration (flow) and strengthening There are important applications in...

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Problems solved by technology

However, the above methods all need to plate a layer of gold and silver precious metals on the substrate, which has the disadvantages of expensive raw materials and complicated preparation processes.