Fibrillar silicate-reinforced super thermal-insulation heat-preserving paint and preparation method thereof

Abstract

The invention provides a fibrillar silicate-reinforced super thermal-insulation heat-preserving paint. The paint is prepared from the following raw materials by weight: 34 to 38 parts of ethyl orthosilicate, a proper amount of hydrochloric acid, a proper amount of ammonia water, a proper amount of ethanol, a proper amount of deionized water, 1 to 2 parts of vinyltrimethoxy silane, 2.5 to 3 parts of dimethyldiethoxylsilane, 0.8 to 1.2 parts of 3-aminopropyltrihydroxysilane, 0.5 to 0.8 part of phenolic resin, 0.2 to 0.4 part of nanometer calcium carbonate, 0.6 to 0.9 part of fibrillar silicate, 70 to 75 parts of epoxy resin E-12, 9 to 12 parts of ethylene glycol diglycidylether and 7 to 7.5 parts of triethanolamine. According to the invention, through hydrophobic modification of aerogel, the phenomenon of fragmentation of the aerogel due to moisture absorption is reduced; and through hydrophilic modification, bonding strength between the aerogel and a film forming agent is improved.

Description

technical field [0001] The invention relates to the field of thermal insulation coatings, in particular to an acicular silicate reinforced super thermal insulation coating and a preparation method thereof. Background technique [0002] Silica airgel has nanopores and is a porous solid material with low density, high porosity and super thermal insulation properties. The combination of silica airgel microspheres and film-forming materials for coatings forms a coating with super thermal insulation properties. [0003] Most of the current silica aerogels are prepared by hydrolysis of silicon sources such as tetraethyl orthosilicate by using the sol-gel method. The silica aerogels thus obtained are very easy to absorb moisture and crack when exposed to water, resulting in a nanoporous structure. If it is destroyed, it will affect the performance of airgel. Therefore, in the preparation process, it is usually necessary to carry out necessary hydrophobic modification on silica gel...

AI Technical Summary

Problems solved by technology

[0004] Overhydrophobic silica airgel microspheres are a good thermal insulation material, but due to the large number of non-polar groups on its surface, when it is mixed with a water-based polymer system, its compatibility is poor and the interface thermal resistance is large At the same time, the airgel microspheres are unevenly dispersed and easily agglomerated, resulting in a decrease in the performance of the composite material. Therefore, it is necessary to properly modify the hydrophobic silica airgel microspheres