Formula based on modified hydrophobic SiO2 (silicon dioxide) self-cleaning paint and preparation method thereof

Abstract

The invention discloses a formula based on modified hydrophobic SiO2 (silicon dioxide) self-cleaning paint. The formula is characterized by comprising the following components by weight percent: 25 to 45 percent of fluorosilicone resin, 15 to 30 percent of hydroxyl-terminated dimethyl siloxane-coated modified nano SiO2 and 30 to 55 percent of aromatic ester mixed solvent, and the formula also comprises a curing agent, and the relative mass ratio range of the curing agent and the components is (0.4:100)-(0.72:100). The hydroxyl-terminated dimethyl siloxane is used for coating and modifying the nano gas-phase SiO2, so that the hydrophobic property is improved; and meanwhile, due to the cladding and modification of the macromolecule polymer, the clustering phenomenon caused by the doping of the nano SiO2 in the polymer can be inhibited, the dispersing efficiency of the nano SiO2 can be improved, and the hydrophobic property of the surface of a paint film can be promoted.

Description

technical field

[0001] The invention relates to the technical field of self-cleaning coatings, in particular to a modified hydrophobic SiO 2 Formulation of self-cleaning coating and method for its preparation. Background technique

[0002] Since the concept of "self-cleaning" was put forward in the 1990s, its research and commercialization have developed rapidly. One of the important research directions of "self-cleaning coatings" is to learn from the biohydrophobic mechanism, such as the perfect hydrophobic self-cleaning function on the surface of lotus leaves. Barthlott W, a professor of botany at the University of Bonn in Germany, found that there are nano-wax crystals on the surface of lotus leaves. This special structure makes the surface of lotus leaves almost non-wettable by water. The particle size is generally larger than wax crystals, so the pollutants will loosely attach to the protruding part of the mastoid, and the pollutants will be easily taken away when the...

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