Modification method for super-hydrophobic packing particle for anti-contamination flashover coating and application

Abstract

The invention discloses a modification method for super-hydrophobic packing particles for an anti-contamination flashover coating and application. The modification method comprises the following steps: 1) preparing a packing particle dispersion; 2) preparing an ethanol dispersion of a fluorinated silane coupling agent, and adjusting the pH value of the ethanol dispersion of the fluorinated silanecoupling agent to 3-5; 3) adding the fluorinated silane coupling agent into the dispersion obtained in the step 2), performing ultrasonic treatment to sufficiently hydrate the fluorinated silane coupling agent so as to obtain a fluorinated silane coupling agent solution for later use; 4) adding the fluorinated silane coupling agent solution prepared in the step 3) into the dispersion with the packing particles prepared in the step 1), and performing a heating stirring reaction to modify the surfaces of the packing particles; 5) drying the modified material, and grinding, thereby obtaining themodified packing particles. According to the modification method, the surfaces of the packing particles for the anti-contamination flashover coating are modified by using the fluorinated silane coupling agent, then the surfaces of the packing particles are hydrophobic but oleophilic, furthermore the hydrophobicity of the coating is improved, and the hydrophobic angle can be up to 150 degrees or larger.

Description

technical field

[0001] The invention belongs to the technical field of nano / micro particle surface modification, and in particular relates to a modification method and application of superhydrophobic filler particles used in antifouling flashover coatings. Background technique

[0002] The performance of antifouling flashover coatings mainly depends on the function and effect of filler particles. The filler particles are mainly nano- and micron-sized particles with hydrophobic properties and rough surface structures, such as nano- and micron-sized silica particles; photocatalytic nanoparticles, such as nano-sized titanium oxide particles; Nanoparticles with flame retardant effect, such as nano-alumina particles. However, these filler particles often have large specific surface area, high surface activity and poor stability due to their nanometer size, which makes it easy for the nanoparticles to agglomerate with each other. Moreover, a large number of active hydroxyl group...