A kind of material with hydrophobic function and its preparation process

Abstract

Disclosed are a novel material with a hydrophobic function and preparation process therefor. A surface of the novel material is in a bionic structure of a lotus leaf. The novel material comprises from bottom to top a substrate layer, a microporous foaming modified adhesive layer and a wax-containing layer dispersedly coated on the microporous foaming modified adhesive layer. The process comprises: firstly, during preparation of the adhesive layer, sufficiently mixing raw materials of the adhesive layer with a dispersing agent and a foaming agent and coating said mixture to a surface of a substrate; using a coating foaming process so as to obtain a modified substrate, and finally dispersedly coating wax to an outer surface of the obtained modified substrate, thereby obtaining the novel material. A rough structure on a surface of a product of the present invention is fundamentally similar to a mastoid process in a micro-nano structure on a rough surface of a lotus leaf and the structure of a hydrophobic waxy material on the surface, and a bionic structure of a lotus leaf is achieved, thereby having a good hydrophobic function.

Description

technical field [0001] The invention relates to a material and its preparation process, in particular, a material with hydrophobic function and its preparation process. Background technique [0002] In recent years, the phenomenon of superhydrophobicity (contact angle greater than 150°, rolling angle less than 10°) and self-cleaning phenomenon in nature has aroused people's research interest. The artificially prepared superhydrophobic surface can be used for the antifouling of automobile windows, glass windows of buildings and glass exterior walls. It can be used for radar and antenna surfaces to prevent signal attenuation caused by adhesion of snow and rain. The superhydrophobic surface of the material can inhibit The adhesion of microorganisms on the surface of objects can inhibit the coagulation phenomenon on the surface of polymers, and it can be used to reduce fluid resistance in the inner pipe wall of water and oil transportation. The research on superhydrophobic surf...

AI Technical Summary

Problems solved by technology

The electrodeposition or chemical deposition method has requirements for equipment and harsh conditions. The hydrothermal method and sol-gel method can only process a small area of ​​the surface. As for the carbon nanotube method, the required conditions are more stringent, requiring high temperature or limited equipment

The electrospinning method has limitations on equipment and cannot be applied to outdoor operations

The porous alumina template required by the template method is not easy to prepare, and cannot process special-shaped surfaces or large-area surfaces

Fluorinated substances such as perfluorosiloxanes used for surface modification are very expensive

Therefore, there is no large-scale production of superhydrophobic products used in industry or daily life. The problem to be solved is that the manufacturing method is simple, suitable for large test pieces, special-shaped surfaces, stable performance, and certain mechanical strength.

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