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Self-cleaning passive radiation refrigeration coating, preparation method and coating structure

A radiation cooling and self-cleaning technology, applied in the direction of reflection/signal coatings, coatings, primers, etc., can solve the problems of decreased solar reflectance, singleness, loss of cooling performance, etc., achieve high solar reflectance and cooling performance, and improve Effects of thermal aging resistance and UV aging resistance, excellent daytime passive radiative cooling performance

Active Publication Date: 2022-07-29
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 coating, preparation method and coating structure
  • Self-cleaning passive radiation refrigeration coating, preparation method and coating structure
  • Self-cleaning passive radiation refrigeration coating, preparation method and coating structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A self-cleaning passive radiation cooling coating includes a passive radiation cooling primer and a transparent superhydrophobic self-cleaning topcoat.

[0049] The transparent super-hydrophobic 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 ethyl orthosilicate, 1 part of hexadecyltrimethoxysilane and 96.8 parts of water . The passive radiation refrigeration primer includes in parts by weight: 30 parts of styrene-acrylic emulsion, 20 parts of nano calcium carbonate, 20 parts of hollow glass beads, 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, and 1 part of film-forming aid.

[0050] A preparation method of the above coating.

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

Embodiment 2

[0059] A self-cleaning passive radiation cooling coating includes a passive radiation 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 ethyl orthosilicate, 2 parts of hexadecyltrimethoxysilane and 95.4 parts of water . The passive radiation refrigeration primer includes in parts by weight: 40 parts of styrene-acrylic emulsion, 13 parts of nano calcium carbonate, 10 parts of hollow glass beads, 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 defoamer, 1.4 parts of leveling agent, and 1.4 parts of film-forming aids.

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

[0062] Figure 5 It is a schematic diag...

Embodiment 3

[0066] A self-cleaning passive radiation cooling coating includes a passive radiation 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 ethyl orthosilicate, 1.5 parts of hexadecyltrimethoxysilane and 96.1 parts of water . The passive radiation refrigeration primer includes in parts by weight: 35 parts of styrene-acrylic emulsion, 10 parts of nano calcium carbonate, 15 parts of hollow glass beads, 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 aids.

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

[0069] Figure 8 It is a schematic diagram of...

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Abstract

The invention discloses a self-cleaning passive radiation refrigeration coating, a preparation method and a coating structure. The coating includes a passive radiant cooling primer and a transparent superhydrophobic self-cleaning topcoat. In the preparation method, a transparent super-hydrophobic self-cleaning topcoat is prepared through nano-hydrophilic silica, 1M hydrochloric acid, ethyl orthosilicate, hexadecyltrimethoxysilane and water. The coating structure is a passive radiation cooling primer and a transparent superhydrophobic self-cleaning topcoat to form a double-layer structure. Benefits of the present invention: It is proved that the transparent superhydrophobic finish coating prepared by the sol-gel method has little effect on the solar reflectance of the passive radiation cooling coating during the day, but enhances the selective infrared radiation of the passive radiation cooling coating in the atmospheric window during the day ; The super-hydrophobic self-cleaning transparent finish coating enables the passive radiation cooling coating to maintain long-term high solar reflectivity and cooling performance during the day. Daytime passive radiant cooling primer improves heat aging and UV aging resistance of transparent superhydrophobic self-cleaning topcoats.

Description

technical field [0001] The invention belongs to the field of passive radiation refrigeration, in particular to a self-cleaning passive radiation refrigeration coating, a preparation method and a coating structure. Background technique [0002] For a surface that faces 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 to the surface by the atmosphere in the form of infrared atm ; (2) the heat P radiated by the surface to the atmosphere or / and the outer space of the atmosphere in the form of infrared rad ; (3) Heat exchange by conduction and convection between the environment and the air with which the surface is in contact. Among them, the heat radiated by the surface in the form of infrared minus the heat absorbed by the surface and radiated downward in the form of infrared by the atmosphere is called the net heat radiated by the surface in the form of infrared, which is...

Claims

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Application Information

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Patent Type & Authority Patents(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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