Efficient colored heat-insulating and cooling coating as well as preparation method and application thereof

Abstract

The invention discloses an efficient colored heat-insulating and cooling coating as well as a preparation method and application thereof, the efficient colored heat-insulating and cooling coating takes a polymer porous film as a bottom layer, and an infrared transparent colored film is arranged on the polymer porous film. The preparation method comprises the following steps: preparing the polymer porous film and preparing the infrared transparent color film on the polymer porous film. The efficient colored heat-insulating and cooling coating has the advantages of being adjustable in appearance color, high in sunlight reflecting capacity, good in heat-insulating and cooling effect and the like, the coating is attached to the surface of a base body needing temperature adjustment and the skin surfaces of animals and human bodies in a covering, coating or pasting mode and the like, the color requirements of city appearance, pollution prevention and the like are met, and meanwhile the heat-insulating and cooling effects are good. The efficient cooling effect can be shown, refrigeration energy consumption is greatly reduced, the use value is high, and the application prospect is good. The preparation method has the advantages of being simple and easy to implement, low in production cost, high in film forming efficiency and the like, is suitable for preparing a large-area coating material and is beneficial to industrial application.

Description

Technical field

[0001] The invention belongs to the technical field of polymer materials and relates to a high-efficiency color heat-insulating and cooling coating and its preparation method and application. Background technique

[0002] Studies have shown that radiative cooling can theoretically achieve a cooling effect of 58°C, provided that the material must have strict spectral selectivity, that is, it only absorbs 100% of the infrared heat in the 8-13 μm band, and does not absorb incident light in other bands, especially the solar band. Be 100% reflective. In order to meet the requirements of high solar reflection efficiency, heat-insulating coatings are usually processed into white color. However, existing white heat-insulating coatings still have the following defects: Affected by the material composition and structure, the white heat-insulating coating itself is not exposed to sunlight. The reflective ability is limited, resulting in a large gap between the overall ...

Examples

Embodiment 1

[0056] The utility model relates to a high-efficiency color heat-insulating and cooling coating, which uses a spectrally selective porous film as a bottom layer, an infrared transparent color film is arranged on the spectrally selective porous film, and the spectrally selective porous film is a polymer porous film.

[0057] In this embodiment, the thickness of the infrared transparent color film is 30 μm, and the color of the infrared transparent color film is medium green MG1151, which is an infrared transparent medium green film. It is prepared after curing. Specifically, the yellow dye in the solvent, the solvent scarlet dye, the solvent emerald green dye, and the solvent black dye are prepared into dye liquors of different colors, and then the above dye liquors are mixed and tinted to meet the requirements of the Lab value. Transparent dye liquor and acrylic resin BS-963 are prepared after curing.

[0058]In this embodiment, the spectrally selective porous film is formed b...

Embodiment 2

[0072] A preparation method of a high-efficiency color thermal insulation and cooling coating, the steps are basically the same as those in Example 1, the difference is only that: in step (2), the thickness of the spectrally selective porous film is 420 μm.

[0073] After testing, the solar reflectance of the high-efficiency color thermal insulation and cooling coating is 40.32%, the maximum temperature of the backside of the coating material is 57.2°C, the reflectance is significantly lower than that of Example 1, and the temperature of the backside is significantly higher than that of Example 1, because The role of the spectrally selective porous film is to reflect sunlight, and its reflectivity is heavily dependent on the thickness of the film. Reducing the film thickness will lead to a significant decrease in the overall sunlight reflectivity and thermal insulation performance of the composite coating.

Embodiment 3

[0075] A preparation method of a high-efficiency color thermal insulation and cooling coating, the steps are basically the same as those in Example 1, the only difference is: in step (2), the thickness of the spectrally selective porous film is 1200 μm.

[0076] After testing, the solar reflectance of the high-efficiency color thermal insulation and cooling coating is 54.05%, the maximum temperature of the back of the coating material is 44.0°C, the reflectivity is slightly higher than that of Example 1, and the temperature of the backside is slightly lower than that of Example 1.

Technical field

[0001] The invention belongs to the technical field of polymer materials and relates to a high-efficiency color heat-insulating and cooling coating and its preparation method and application. Background technique

[0002] Studies have shown that radiative cooling can theoretically achieve a cooling effect of 58°C, provided that the material must have strict spectral selectivity, that is, it only absorbs 100% of the infrared heat in the 8-13 μm band, and does not absorb incident light in other bands, especially the solar band. Be 100% reflective. In order to meet the requirements of high solar reflection efficiency, heat-insulating coatings are usually processed into white color. However, existing white heat-insulating coatings still have the following defects: Affected by the material composition and structure, the white heat-insulating coating itself is not exposed to sunlight. The reflective ability is limited, resulting in a large gap between the overall ...

Examples

Embodiment 1

[0056] The utility model relates to a high-efficiency color heat-insulating and cooling coating, which uses a spectrally selective porous film as a bottom layer, an infrared transparent color film is arranged on the spectrally selective porous film, and the spectrally selective porous film is a polymer porous film.

[0057] In this embodiment, the thickness of the infrared transparent color film is 30 μm, and the color of the infrared transparent color film is medium green MG1151, which is an infrared transparent medium green film. It is prepared after curing. Specifically, the yellow dye in the solvent, the solvent scarlet dye, the solvent emerald green dye, and the solvent black dye are prepared into dye liquors of different colors, and then the above dye liquors are mixed and tinted to meet the requirements of the Lab value. Transparent dye liquor and acrylic resin BS-963 are prepared after curing.

[0058]In this embodiment, the spectrally selective porous film is formed b...

Embodiment 2

[0072] A preparation method of a high-efficiency color thermal insulation and cooling coating, the steps are basically the same as those in Example 1, the difference is only that: in step (2), the thickness of the spectrally selective porous film is 420 μm.

[0073] After testing, the solar reflectance of the high-efficiency color thermal insulation and cooling coating is 40.32%, the maximum temperature of the backside of the coating material is 57.2°C, the reflectance is significantly lower than that of Example 1, and the temperature of the backside is significantly higher than that of Example 1, because The role of the spectrally selective porous film is to reflect sunlight, and its reflectivity is heavily dependent on the thickness of the film. Reducing the film thickness will lead to a significant decrease in the overall sunlight reflectivity and thermal insulation performance of the composite coating.

Embodiment 3

[0075] A preparation method of a high-efficiency color thermal insulation and cooling coating, the steps are basically the same as those in Example 1, the only difference is: in step (2), the thickness of the spectrally selective porous film is 1200 μm.

[0076] After testing, the solar reflectance of the high-efficiency color thermal insulation and cooling coating is 54.05%, the maximum temperature of the back of the coating material is 44.0°C, the reflectivity is slightly higher than that of Example 1, and the temperature of the backside is slightly lower than that of Example 1.

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