Novel thermal-insulation waterproof coating used for solar energy devices

Abstract

The invention relates to a novel thermal-insulation waterproof coating used for solar energy devices. The coating is prepared from the following components in parts by weight: 44-87 parts of a film forming agent, 28-32 parts of acrylic resin, 1-3 parts of polyvinylpyrrolidone, 1.0-2.4 parts of carbon black, 1.1-1.8 parts of chrome oxide green, 8-10 parts of methyl isobutyl ketone, 13-25 parts of afilm forming auxiliary agent, 4-9 parts of enamel black, 44-63 parts of a light absorbing agent, 1-3 parts of chlorinated paraffin, 1-2 parts of carbon black, 8-10 parts of precipitated barium sulfate, 23-47 parts of a solvent, 4-8 parts of a manganese ferrite black pigment, 6-23 parts of an auxiliary agent, 0.2-0.4 part of a silane coupling agent, and 1-2 parts of sulfonated graphene. The coating provided by the invention has the advantages that a coating layer prepared from the coating has a high absorption rate, high thermal conductivity, low radiance and high stability, and a conversion rate of solar energy by an endothermic coating is effectively improved; and the coating has good weather resistance and water resistance, and is a solar energy endothermic coating especially suitable for a solar energy heat absorber.

Description

technical field

[0001] The invention relates to the field of solar energy, in particular to a novel thermal insulation and waterproof coating for solar energy. Background technique

[0002] Solar absorbing coatings have a great impact on the technical and economic performance of solar energy utilization. In order to improve the efficiency of solar energy devices and reduce costs, solar science and technology workers in various countries attach great importance to the research and development of solar absorbing coatings, and have developed a variety of coatings. has been used in production with good results.

[0003] Electroplating coating is a mature technology of solar absorbing materials, which can be divided into black chromium coating or black nickel coating. The absorption ratio α and emission ratio ε of black chromium coating are 0.93-0.97 and 0.07 respectively. -0.15, α / ε is 6-13, with excellent spectral selectivity. The thermal stability and high temperature resist...