A preparation method of a super-oleophobic metal surface with concave micropores

Abstract

The invention discloses a method for manufacturing an ultra-oleophobic metal surface with recessed micropores. The method includes the following steps that a metal substrate is cleaned and dried; a nickel block serving as a positive pole and the metal substrate serving as a negative pole are connected to the positive pole and the negative pole of a power source respectively, and a nickel deposition solution evenly mixed with soluble spherical micronano-particles passes the portion between the positive pole and the negative pole to be powered on to form an electric settled layer, so that the soluble spherical micronano-particles are embedded in a metallic nickel layer and in the surface of the metallic nickel layer; cleaning and drying are conducted; the workpiece is put into a dissolution solution so that the soluble spherical micronano-particles can be dissolved, and the ultra-oleophobic surface of the recessed structure is formed on the surface of the nickel layer; and lower-surface-energy modification is conducted. According to the method, the soluble spherical micronano-particles pass the portion between the negative pole and the positive pole to be embedded in the surface of the deposition layer and in the deposition layer, then the soluble spherical micronano-particles are dissolved, and the oleophobic surface of the recessed structure is formed; and the specification and morphology of the recessed pores can be controlled through the size of the spherical particles so that the pores can be evenly and regularly arranged, batch production is achieved, and good wear resistance and ultra-oleophobic performance are achieved.

Description

technical field [0001] The invention relates to a super-oleophobic surface processing technology, in particular to a method for preparing a super-oleophobic metal surface with concave micropores. Background technique [0002] Wettability is a common phenomenon in nature. For example, the phenomenon that rainwater falls on the surface of lotus leaves to form spherical droplets and rolls down, and the self-cleaning effect of lotus leaves "out of silt without staining", which is the phenomenon of superhydrophobicity. In addition, many animals and plants, such as the feet of water striders, the wings of butterflies, and rice leaves, also have superhydrophobic properties. Studies have shown that the superhydrophobic properties of all these surfaces are formed due to the combined action of micro-nano rough structures and low surface energy substances. [0003] Wettability is also an important aspect in the fields of material science and surface engineering, and has many important...

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Problems solved by technology

[0007] The above methods have the following corresponding defects: (1) template-free wet etching can etch silicon and metal surfaces, with high efficiency and low cost, but the controllability of the etched surface morphology is poor. This method is easy to obtain a super-hydrophobic surface. But it is not easy to obtain a super-oleophobic surface; the oleophobic surface can be obtained by Bosch etching method, but the process is complex and only suitable for silicon materials

(2) The femtosecond laser etching method can prepare micro-nano nested structure surface with high precision and regular shape, but the process efficiency is low, it is not suitable for large-scale manufacturing, and the equipment is extremely expensive

(3) The electrospinning method uses micro / nano filaments to construct a rough structure on the surface, and it is easy to control the required structure of the oleophobic surface, but the prepared surface has poor mechanical properties and does not have good wear resistance, etc. , the service life is relatively short; (4) The electrodeposition method can deposit metals or polymers, which can efficiently and conveniently prepare surfaces with micro-nano rough structures, but the morphology is highly random and difficult to control, and it is not easy to produce concave or cantilever structures

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