Ultra hydrophobic surface preparation method

Abstract

The invention relates to a preparation method of a superhydrophobic surface, in particular to a method for preparing the superhydrophobic surface by compounding micron or sub-micron particles with nanometer pores or nanometer decorative surfaces and a low surface energy material. The method concretely comprises the following steps: the superhydrophobic surface is prepared by compounding the micron or sub-micron particles with nano-sized pores or surfaces decorated by nanometer and the low surface energy material; firstly activation is carried out to the particle surfaces by the existing mature surface activation technology so as to remove passivation membranes on the particle surfaces; then the low surface energy material, the micron or sub-micron particles after surface activation, a coupling agent and the like are evenly mixed, and the mixture is sprayed or painted on the surface to be processed according to needs; finally the hydrophobic surface is obtained after natural drying or being dried at a reasonable temperature. The method can solve the problem that the surface of a special shape is difficult to process in the prior art; the process is simple, thus being suitable for mass application; and the prepared hydrophobic surface has long service life.

Description

technical field [0001] The invention relates to a method for preparing a super-hydrophobic surface, in particular, the invention relates to a method for preparing a super-hydrophobic surface by combining micron or submicron particles with nanopores or nano-modified surfaces with low surface energy materials. Background technique [0002] The basic theoretical research on superhydrophobic membranes began in the 1950s. Generally, the contact angle with water greater than 150° is called superhydrophobic film. The contact angle is determined as the angle between the tangent to the contour at the end of the beading curve at the liquid-solid-gas junction and the solid surface. Due to the unique surface characteristics of the super-hydrophobic film, it has broad application prospects in national defense, daily life and many industrial fields. For example, super-hydrophobic technology is used on outdoor antennas to prevent snow accumulation and ensure communication quality; it is u...

AI Technical Summary

Problems solved by technology

[0005] However, the current various technologies are still difficult to solve the preparation of large-area hydrophobic surfaces and coatings. Many technologies still have problems such as the need to use complex equipment or high-temperature calcinations, which limits the types and quantities of super-hydrophobic surfaces or coating products. greatly restricted

In addition, whether it is to construct a special surface microstructure first and then modify the low surface energy material, or to construct a special surface microstructure on the surface of the low surface energy material, the formed superhydrophobic surface is relatively easy to damage and has no self-healing function.