Preparation method of antiwear super-hydrophobic carbon black enhanced polyurethane coating

Abstract

The invention relates to a preparation method of an antiwear super-hydrophobic carbon black enhanced polyurethane coating. The preparation method is characterized in that the coating is composed of carbon black enhanced polyurethane elastomers, the coating surface is of order micro-bump structure, the static contact angle of the coating surface and the water is not larger than 160 degrees, and the coating is subjected to antiwear performance test according to the standard ASTMD (American Society Testing and Materials) 968-05 (Test for measuring wear resistance of an organic coating by a falling sand wear method), and the result indicated that the coating is subjected to wear test by five kilograms of quartz sand falling from a guide pipe 960mm in height and 20mm in internal diameter. The static contact angle of the coating and the water is still kept larger than 150 degrees. The preparation method includes two steps of 1) synthesizing carbon black enhanced polyurethane powder rubber; 2) preparing and spraying coating liquid, after coating, and forming the order micro-bump structure on the surface of a base body, namely the super-hydrophobic coating. The antiwear super-hydrophobic carbon black enhanced polyurethane coating is applicable to glass, metal, wood and ceramic base bodies.

Description

technical field [0001] The invention relates to a preparation method of an anti-wear carbon black reinforced polyurethane superhydrophobic coating, which belongs to the technical field of coatings. Background technique [0002] Super-hydrophobic coatings refer to coatings with a contact angle greater than 150° with water droplets. Super-hydrophobic coatings have the functions of self-cleaning, waterproof, and anti-ice and snow adhesion. They have application prospects in daily life and industrial fields. Super-hydrophobic coatings have a highly rough structure , when the superhydrophobic surface is subjected to friction, in fact, the micron or nanometer protrusions on the surface bear the pressure and shear action, and the pressure and shear stress carried by the surface micro-protrusions are far greater than the apparent pressure and shear stress, thus causing the surface The rough structure is damaged due to stress concentration, which eventually leads to the failure of th...

AI Technical Summary

Problems solved by technology

[0002] Super-hydrophobic coatings refer to coatings with a contact angle greater than 150° with water droplets. Super-hydrophobic coatings have the functions of self-cleaning, waterproof, and anti-ice and snow adhesion. They have application prospects in daily life and industrial fields. Super-hydrophobic coatings have a highly rough structure , when the superhydrophobic surface is subjected to friction, in fact, the micron or nanometer protrusions on the surface bear the pressure and shear action, and the pressure and shear stress carried by the surface micro-protrusions are far greater than the apparent pressure and shear stress, thus causing the surface The rough structure is damaged due to stress concentration, which eventually leads to the failure of the superhydrophobic function

Therefore, the superhydrophobic surface is prone to wear and failure during use

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