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Self-cleaning passive radiation refrigeration paint as well as preparation method and coating structure thereof

A radiative cooling and self-cleaning technology, used in reflective/signal coatings, coatings, primers, etc., can solve the problems of single, loss of cooling performance, decreased solar reflectance, etc., to achieve high solar reflectance and cooling performance, improve The effect of heat aging resistance and UV aging resistance, and excellent daytime passive radiation cooling performance

Active Publication Date: 2021-08-20
中建西南院光子科技(四川)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Since the white surface has the highest solar reflectance, which is beneficial to suppress the absorption of solar heat by the surface, so far, the existing daytime passive radiative cooling technology has a single appearance of white
The solar reflectance of white surfaces is usually reduced by dirt and other pollutants and loses cooling performance

Method used

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  • Self-cleaning passive radiation refrigeration paint as well as preparation method and coating structure thereof
  • Self-cleaning passive radiation refrigeration paint as well as preparation method and coating structure thereof
  • Self-cleaning passive radiation refrigeration paint as well as preparation method and coating structure thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A self-cleaning passive radiative cooling coating, comprising a passive radiative cooling primer and a transparent superhydrophobic self-cleaning topcoat.

[0049] The transparent superhydrophobic self-cleaning topcoat includes in parts by weight: 1 part of nano-hydrophilic nano-silica, 0.2 part of 1M hydrochloric acid, 1 part of tetraethyl orthosilicate, 1 part of hexadecyltrimethoxysilane and 96.8 parts of water . The passive radiative refrigeration primer includes in parts by weight: 30 parts of styrene-acrylic emulsion, 20 parts of nano-calcium carbonate, 20 parts of hollow glass microspheres, 20 parts of silicon dioxide, 5 parts of water, 1 part of dispersant, and 1 part of wetting agent , 1 part of defoamer, 1 part of leveling agent, 1 part of film-forming aid.

[0050] A preparation method of the above coating.

[0051] Weigh nano-hydrophilic silica, 1M hydrochloric acid, ethyl orthosilicate, hexadecyltrimethoxysilane and water according to the formula, and aft...

Embodiment 2

[0059] A self-cleaning passive radiative cooling coating, comprising a passive radiative cooling primer and a transparent superhydrophobic self-cleaning topcoat.

[0060] The transparent superhydrophobic self-cleaning topcoat includes in parts by weight: 2 parts of nano-hydrophilic nano-silica, 0.1 part of 1M hydrochloric acid, 0.5 part of tetraethyl orthosilicate, 2 parts of hexadecyltrimethoxysilane and 95.4 parts of water . The passive radiative refrigeration primer includes in parts by weight: 40 parts of styrene-acrylic emulsion, 13 parts of nano-calcium carbonate, 10 parts of hollow glass microspheres, 10 parts of silicon dioxide, 20 parts of water, 1.4 parts of dispersant, and 1.4 parts of wetting agent , 1.4 parts of defoaming agent, 1.4 parts of leveling agent, and 1.4 parts of film-forming aid.

[0061] A preparation method and coating structure of the above-mentioned passive radiative refrigeration coating are the same as in Example 1.

[0062] Figure 5 It is a ...

Embodiment 3

[0066] A self-cleaning passive radiative cooling coating, comprising a passive radiative cooling primer and a transparent superhydrophobic self-cleaning topcoat.

[0067] The transparent superhydrophobic self-cleaning topcoat includes in parts by weight: 1.5 parts of nano-hydrophilic nano-silica, 0.15 parts of 1M hydrochloric acid, 0.75 parts of tetraethyl orthosilicate, 1.5 parts of hexadecyltrimethoxysilane and 96.1 parts of water . The passive radiative refrigeration primer includes in parts by weight: 35 parts of styrene-acrylic emulsion, 10 parts of nano-calcium carbonate, 15 parts of hollow glass microspheres, 15 parts of silicon dioxide, 15 parts of water, 2 parts of dispersant, and 2 parts of wetting agent , 2 parts of defoamer, 2 parts of leveling agent, 2 parts of film-forming aid.

[0068] A preparation method and coating structure of the above-mentioned passive radiative refrigeration coating are the same as in Example 1.

[0069] Figure 8 It is a schematic dia...

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Abstract

The invention discloses a self-cleaning passive radiation refrigeration paint as well as a preparation method and a coating structure thereof. The paint comprises a passive radiation refrigeration primer and transparent super-hydrophobic self-cleaning finishing paint. According to the preparation method, the transparent super-hydrophobic self-cleaning finishing paint is prepared from nano hydrophilic silicon dioxide, 1M hydrochloric acid, tetraethoxysilane, hexadecyl trimethoxy silane and water. The paint is of a double-layer structure formed by the passive radiation refrigeration primer and the transparent super-hydrophobic self-cleaning finishing paint. The transparent super-hydrophobic top-coat paint prepared by a sol-gel method has little influence on the solar reflectivity of a daytime passive radiation refrigeration coating, but enhances the selective infrared radiation of the daytime passive radiation refrigeration coating in an atmospheric window; the super-hydrophobic self-cleaning transparent top-coat paint enables the daytime passive radiation refrigeration coating to maintain long-term high solar reflectivity and refrigeration performance. The daytime passive radiation refrigeration primer improves the heat aging resistance and the ultraviolet aging resistance of the transparent super-hydrophobic self-cleaning finishing paint.

Description

technical field [0001] The invention belongs to the field of passive radiation refrigeration, and specifically relates to a self-cleaning passive radiation refrigeration coating, a preparation method and a coating structure thereof. Background technique [0002] For a surface facing the sky during the day, there are three thermal phenomena as follows: (1) The short-wave solar heat P absorbed by the surface sun and the heat P radiated by the atmosphere to the surface in the form of infrared atm (2) The heat P radiated from the surface to the atmosphere or / and space outside the atmosphere in the form of infrared rad ; (3) Heat exchange between the surface and the environment in contact with the air through conduction and convection. Among them, the heat radiated by the surface in the form of infrared minus the heat absorbed by the surface and radiated downward by the atmosphere in the form of infrared is called the net heat radiated by the surface in the form of infrared, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D125/14C09D7/62C09D7/61C09D5/33
CPCC09D125/14C09D7/62C09D7/61C09D7/70C09D5/002C09D5/004C08K2201/011C08K2003/265C08K9/06C08K3/36C08K3/26C08K7/28
Inventor 张卫东蔡元柱张红强李艳稳刘联华冯雅秦杰窦枚
Owner 中建西南院光子科技(四川)有限公司
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