Method for producing structure body having super-hydrophobic surface

Abstract

The invention provides a method for producing a structure body having a super-hydrophobic surface, and belongs to the technical field of materials. The preparation method comprises the following steps: preparing modified nano SiO2 particles and SiO2 alcosol by taking nano SiO2 particles as a raw material; and preparing a prepolymer solution from the modified nano SiO2 particles and the SiO2 alcosol, coating a clean matrix structure with the prepolymer solution, and curing the prepolymer solution on the matrix structure to form a structure body with a stable super-hydrophobic surface, wherein the super-hydrophobic surface exhibits a contact angle of not less than 158 degrees and a rolling angle of less than 5 degrees. According to the preparation method provided by the invention, the roughstructure and the roughness of the super-hydrophobic surface can be increased, the water contact angle is increased, the rolling angle and the viscous force to water are reduced, the wear resistance,the durability and the high-temperature stability are improved, and the ultraviolet aging resistance is enhanced, so that the contact angle loss rate under ultraviolet weathering is reduced, the service life is prolonged, and the waterproof and antifouling effects are enhanced.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a structure with a superhydrophobic surface. Background technique [0002] Superhydrophobicity is an extreme wetting phenomenon. In general, superhydrophobicity refers to the contact angle of a liquid droplet on a solid surface greater than 150°. In addition, a surface is considered to be: self-cleaning if it exhibits a water drop rolling (sliding) angle of less than 10°. Generally, hydrophobicity is expressed by covering the surface with molecular residues with low surface tension, but it is difficult to express superhydrophobicity only with molecular residues with low surface tension. Due to the unique wetting properties of superhydrophobic surfaces, it has a wide range of potential applications, such as anti-icing, self-cleaning, drag reduction, anti-fog and corrosion resistance, etc. application value. It is well known that the combin...

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Problems solved by technology

[0003] The superhydrophobic materials reported so far can achieve superhydrophobic properties under relatively mild conditions. However, the special micro-nano binary structure of the superhydrophobic surface has poor adaptability to the external environment. Under complex working conditions such as high temperature, organic solvent and gas, particle or bacterial pollution, ultraviolet light irradiation or some mechanical wear, the surface structure will be polluted or destroyed, such as caused by the deposition of industrial dust or salt or in the process of moisture evaporation Dissolved particles are separated and deposited on the surface, thus losing their superhydrophobic properties. However, conventional technologies cannot prevent damage to the surface due to high temperature, acid-base environment, ultraviolet rays, pollutants such as dust, particles or bacteria accumulation, which severely limits Practical applications of superhydrophobic surfaces

Superhydrophobic membranes and their production methods are frequently mentioned in many known documents, but most of them are equivalent to the processing methods for the roughness of the substrate surface, and the surface treatment process is easy to become complicated and the cost is high.

In addition, in the case of an organic polymer-based superhydrophobic surface, although the cost is low, the resulting superhydrophobic surface has low solvent resistance and corrosion resistance, so there are practical problems.

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