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Thermochromic radiation refrigeration coating, thermochromic radiation refrigeration film and preparation method thereof

A technology of thermochromism and radiation cooling, applied in heat-sensitive coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as increasing heating energy consumption, achieve the effect of promoting radiation cooling, enhance solar radiation reflection, and maintain comfort The effect of temperature

Pending Publication Date: 2022-02-01
SUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the temperature is high in summer, the traditional radiant cooling coating has a good cooling capacity, but when the temperature is low in winter, it increases the consumption of heating energy

Method used

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  • Thermochromic radiation refrigeration coating, thermochromic radiation refrigeration film and preparation method thereof
  • Thermochromic radiation refrigeration coating, thermochromic radiation refrigeration film and preparation method thereof
  • Thermochromic radiation refrigeration coating, thermochromic radiation refrigeration film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1 This example provides a thermochromic radiation cooling coating, a thermochromic radiation cooling film and a preparation method thereof.

[0041] 1. The raw materials for the preparation of thermochromic radiation refrigeration coatings include the following components in parts by weight:

[0042]

[0043]

[0044] 2. A thermochromic radiation refrigeration film, its preparation method is as follows:

[0045] Mix and stir the above-mentioned temperature-sensitive resin, film-forming agent, dispersant, defoamer, thickener, radiation agent, reflector, and solvent for 90 minutes to form a thermochromic radiation refrigeration coating, and coat the thermochromic The radiative cooling coating was prepared with a film thickness of 400 μm.

[0046] 3. The thermochromic temperature of the film prepared above was measured by an ultraviolet spectrophotometer to be 37.4°C.

[0047]

[0048] After the film of the invention changes color repeatedly for 1000 tim...

Embodiment 2

[0049] Example 2 This example provides a thermochromic radiation refrigeration coating, a thermochromic radiation refrigeration film and a preparation method thereof, which are basically the same as in Example 1, except that some of the preparation raw materials are different, and the specific differences are as follows: The molecular weight of N-isopropylacrylamide is 10 4 g·mol -1 .

[0050] The thermochromic temperature of the film prepared above was measured by an ultraviolet spectrophotometer to be 34.8°C.

[0051]

[0052]

[0053] After the film of the invention changes color repeatedly for 1000 times, its color changing performance and radiation cooling performance are still stable.

Embodiment 3

[0054] Example 3 This example provides a thermochromic radiation refrigeration coating, a thermochromic radiation refrigeration film and a preparation method thereof, which are basically the same as in Example 1, except that some of the preparation raw materials are different, and the specific differences are as follows: The molecular weight of N-isopropylacrylamide is 10 5 g·mol -1 .

[0055] The thermochromic temperature of the film prepared above was measured by an ultraviolet spectrophotometer to be 33.6°C.

[0056]

[0057] After the film of the invention changes color repeatedly for 1000 times, its color changing performance and radiation cooling performance are still stable.

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Abstract

The invention relates to a thermochromic radiation refrigeration coating. The coating is prepared from the following raw materials in parts by weight: 50-150 parts of thermo-sensitive resin; 5-10 parts of a film forming agent; 0.1-5 parts of a dispersant; 0.1-4 parts of a defoaming agent; 0.1-4 parts of a thickening agent; 4-7 parts of a radiation agent; 1-7 parts of a reflecting agent; and 100-500 parts of a solvent. A color change mechanism of the thermochromic radiation refrigeration film is temperature control type color change, the color change temperature range is within the natural environment temperature range, when the environment temperature is high, the film is white, and solar radiation reflection is enhanced; when the environment temperature is low, the film becomes transparent, and the radiation refrigeration capacity of the film is reduced; therefore, the effects of saving energy for buildings in four seasons, keeping indoor comfortable temperature, reducing use of air conditioners and heating equipment and reducing carbon emission are achieved. In addition, through simple formula adjustment, the thermochromic temperature can be adjusted; the film is sensitive in color change, high in temperature sensitivity and rapid in color change; the raw material cost is low, the preparation method is simple, and the product is widely applicable to industries such as buildings and automobiles.

Description

technical field [0001] The invention relates to the field of composite films, in particular to a thermochromic radiation cooling coating, a thermochromic radiation cooling film and a preparation method thereof. Background technique [0002] With the continuous growth of the global economy, population, etc., and the rapid advancement of industrialization and urbanization, the world's energy consumption is increasing day by day. According to the survey, in developed countries, up to 40% of the total energy consumption is used for building energy consumption, and China's building energy consumption accounts for as much as one-third. According to the U.S. Energy Information Administration's forecast, China will become the largest building energy consumer by 2040, its energy consumption is twice that of the United States, accounting for 24% of the world's total building energy consumption. At present, about 50% of building energy consumption in my country is used for heating, co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/24C09D175/04C09D5/26C09D7/61
CPCC09D133/24C09D5/26C09D7/61C08K2003/2241C08K2201/005C08L75/04C08K3/36C08K3/22Y02P20/10
Inventor 夏欣瑶王赛季浩卿陆洪彬
Owner SUZHOU UNIV
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