Replacement reaction method for preparation of silver dendritic super-hydrophobic surface

Abstract

The invention discloses a replacement reaction method for preparation of a silver dendritic super-hydrophobic surface. The method comprises the steps that 1, silver nitrate crystals are dissolved in distilled water and stirred to be even so as to obtain a solution A; 2, tetradecanoic acid is dissolved in absolute ethyl alcohol to obtain a solution B; 3, an oxide layer on the surface of a copper matrix is removed and then washed out sequentially through distilled water and absolute ethyl alcohol, and the copper matrix is dried for standby application; 4, the copper matrix is immersed in the solution A to be subjected to replacement reaction; and 5, the copper matrix obtained in the step 4 is washed out sequentially through distilled water and absolute ethyl alcohol, then the solution B is evenly smeared on the surface of the washed copper matrix, the surface of the copper matrix is aired and slightly wiped with a sponge, and then the silver dendritic super-hydrophobic surface is obtained. By the adoption of the method, the contact angle of the prepared super-hydrophobic surface on the copper matrix can reach more than 156 degrees, and the super-hydrophobic property keeps stable after the super-hydrophobic surface is put under the normal condition for one year.

Description

technical field [0001] The invention belongs to the technical field of preparation of hydrophobic surface materials, and in particular relates to a displacement reaction method for preparing superhydrophobic surfaces of silver dendrites. Background technique [0002] Many animals and plants in nano nature have super-hydrophobic properties, such as lotus leaves, taro leaves and other surfaces with super-hydrophobic self-cleaning properties. Inspired by this, researchers have carried out research on superhydrophobic properties, and this direction has developed into a research hotspot in surface science. Superphobic surfaces usually use a combination of low surface energy and micro-nano structures to achieve superphobic properties. Superhydrophobic materials are widely used in daily life, industrial production, and national defense. Building superhydrophobic films on metal surfaces can enhance the corrosion resistance of metals. [0003] With the in-depth study of superhydrop...

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Problems solved by technology

However, these methods still have some disadvantages, such as expensive materials, complicated process control, and the need to use templating agents, which seriously hinder their large-scale application in engineering.

[0004] In recent years, the superhydrophobic surface of the dendritic structure has attracted much attention in the field of superphobicity. Although the related literature on the metal dendritic structure in the superphobic field has gradually increased, there are successful cases in which researchers have applied the dendritic structure to the superphobic field in the prior art. But very few, most of them are in the research stage, although there have also been a small number of reports on super-thin surfaces with metal dendritic structures. For example, Wang et al. deposited metal gold on silicon wafers by current exchange reaction technology. A dendritic micro / nano double-layer rough structure is obtained, and the surface is modified with dodecanethiol to show superhydrophobicity, but this method is cumbersome, and the preparation conditions are harsh and the reaction time is long

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