Radiation refrigeration coating, as well as preparation method and testing device thereof

A radiation cooling and coating technology, which is applied in the direction of measuring devices, coatings, and electrical devices, etc., can solve the problems of increasing preparation costs and manufacturing difficulties, not reflecting the cooling effect, and affecting the weather resistance of materials, etc., and achieves obvious effects of radiation cooling , environmental friendliness, stable temperature difference data

Active Publication Date: 2018-11-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will undoubtedly increase the preparation cost and difficulty of the material, and the weather resistance of the material will be affected to a certain extent.
However, these methods have problems such as complex structure and high cost.
There is no uniform standard for the relevant cooling effect test, and many domestic test methods cannot reflect its real cooling effect

Method used

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  • Radiation refrigeration coating, as well as preparation method and testing device thereof
  • Radiation refrigeration coating, as well as preparation method and testing device thereof
  • Radiation refrigeration coating, as well as preparation method and testing device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In this example, Mg 11 (HPO 3 ) 8 (OH) 6 Prepare the radiation refrigeration coating of the present invention for the functional powder, and respectively use TiO 2 , CaCO 3 A control sample was prepared for the functional powder.

[0034] First, weigh the functional powder and the binder according to the functional powder: PVDF (polyvinylidene fluoride, binder) = 70%: 30% (mass ratio). Take by weighing oxalic acid as dispersant according to 1% of functional powder and binder mass sum, then press certain solid content (solid (Mg 11 (HPO 3 ) 8 (OH) 6 、TiO 2 , CaCO 3 )=25%) and weighed NMP (nitrogen-methylpyrrolidone, organic solvent). Next, dissolve the pre-weighed binder into NMP, and stir (0.5 hour) while heating (80°C) until it becomes transparent without bubbles. Mix the weighed functional powder and oxalic acid into it, stir well, seal it with plastic wrap and release it for ball milling with a planetary ball mill for 8 hours. Prepare the slurry to be co...

Embodiment 2

[0037] In this example, Mg 11 (HPO 3 ) 8 (OH) 6 Prepare the radiation refrigeration coating of the present invention for the functional powder, and respectively use TiO 2 , CaCO 3 A control sample was prepared for the functional powder.

[0038] First, weigh the functional powder and the binder according to the functional powder:PVDF (polyvinylidene fluoride, binder)=85%:15% (mass ratio). Take by weighing oxalic acid as dispersant according to the 2% of functional powder and binder mass sum, then according to a certain solid content (solid (Mg 11 (HPO 3 ) 8 (OH) 6 、TiO 2 , CaCO 3 )=30%) and weigh NMP (nitrogen-methylpyrrolidone, organic solvent). Next, dissolve the pre-weighed binder into NMP, and stir (1 hour) while heating (100°C) until it becomes transparent without bubbles. Mix the weighed functional powder and oxalic acid into it, stir well, seal it with plastic wrap, and release it for ball milling with a planetary ball mill for 10 hours. Prepare the slurry ...

Embodiment 3

[0041] In this example, Mg 11 (HPO 3 ) 8 (OH) 6Prepare the radiation refrigeration coating of the present invention for the functional powder, and respectively use TiO 2 , CaCO 3 A control sample was prepared for the functional powder.

[0042] First, weigh the functional powder and the binder according to the functional powder: PVDF (polyvinylidene fluoride, binder)=90%:10% (mass ratio). Take by weighing oxalic acid as dispersant according to the 3% of functional powder and binder quality and, then according to certain solid content (solid (Mg 11 (HPO 3 ) 8 (OH) 6 、TiO 2 , CaCO 3 )=35%) and weigh NMP (nitrogen-methylpyrrolidone, organic solvent). Next, dissolve the pre-weighed binder into NMP, and stir (1 hour) while heating (120°C) until it becomes transparent without bubbles. Mix the weighed functional powder and oxalic acid, stir well, seal it with plastic wrap and release it for ball milling with a planetary ball mill for 12 hours. Prepare the slurry to be co...

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Abstract

The invention discloses a preparation method of a radiation refrigeration coating. The method comprises the following steps: (1) weighing raw materials in a mass ratio of Mg11(HPO3)8(OH)6powder to a binder of (70-90%) to (10-30%); (2) dissolving the binder to an organic solvent, heating and stirring until the mixture is in a transparent and bubble-free state, and then mixing in the Mg11(HPO3)8(OH)6 powder weighed in the step (1) to obtain a blend; and (3) adding a dispersant to the blend obtained in step (2) and mixing evenly to prepare film slurry to be coated. The invention also discloses atesting device for testing the radiation refrigeration coating.The invention has the advantages that the preparation method is simple, environmental friendliness is realized and the effect is remarkable, and the problems that the cost is high when a multi-layer nano film is adopted for realizing radiation refrigeration, and the production process is complicated can be effectively solved, and at the same time, the problem of the insufficient cooling effect by traditional single reflection or radiation can be solved.

Description

technical field [0001] The invention relates to a radiation cooling material, in particular to a radiation cooling coating, a preparation method and a test device thereof. Background technique [0002] Radiation refrigeration materials have high reflectivity in the ultraviolet-visible-near-infrared region of solar energy, and at the same time, they can transmit their energy as much as possible through the infrared window of the atmosphere in the form of infrared radiation in the 8-13μm band, and emit it efficiently to The outer layer of the atmosphere, thus combining reflection and emission to achieve the purpose of comprehensive cooling or cooling. [0003] At present, the application of radiation cooling is mainly realized through the design of multi-layer film structure, which can generally be divided into emission layer and reflection layer. The film layers of different materials overlap each other, and there is also a high precision requirement for the thickness of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/33C09D7/63G01N25/20G01K7/02
CPCC09D1/00C09D5/004C09D7/63G01K7/02G01N25/20
Inventor 张志杰徐志魁钟明锋吴文刚刘德芳
Owner SOUTH CHINA UNIV OF TECH
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