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Low-cost large-scale-application radiation refrigeration thin film and preparing method

A radiation refrigeration and large-area technology, applied in refrigerators, refrigeration and liquefaction, devices for coating liquid on surfaces, etc., can solve problems such as difficult application and promotion, high cost, and difficult processing of micro-nano structures

Pending Publication Date: 2020-07-31
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the difficulty and high cost of micro-nano structure processing, it is difficult to achieve large-scale application and promotion.

Method used

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  • Low-cost large-scale-application radiation refrigeration thin film and preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: First configure the precursor solution: (a) PDMS solution: mix polydimethylsiloxane prepolymer A and crosslinking agent B in chloroform at a mixing ratio of 10:1:20, Then stir it with magnetic force to make it evenly mixed, and let it stand for use. (b) Particle dispersion: 20nm Si 3 N 4 Particles were dispersed in deionized water, ultrasonically stirred for 20 minutes, and magnetically stirred for 3 minutes before use. Then start the sample preparation: put the evaporated silver glass substrate with a thickness of 100nm on the surface of the flat plate of the film scraper, then spray the configured particle dispersion on the aluminum foil, and then place it in a fume hood to dry naturally for 20 minutes. Then invert an appropriate amount of the prepared PDMS solution on the initial end of the film scraping coating, and select a 6um thick wire rod to scrape coating at a certain speed. Put the coated film into an oven and cure it at 100 degrees Celsius for ...

Embodiment 2

[0013] Embodiment 2: The preparation method of the precursor solution of organic matter and particulate matter is the same as that of Embodiment 1, and SiO with a particle size of 100 nm is used 2 . Then start the sample preparation: place the evaporated gold glass substrate with a thickness of 150nm on the surface of the flat plate of the film scraper, spray the configured particle dispersion on the aluminum foil, and then place it in a fume hood to dry naturally for 20 minutes. Then the sample was placed on the suction cup of the spin coater, and the prepared PDMS solution was spin-coated on the surface of the sample. Put the coated film into an oven and cure it at 100 degrees Celsius for one hour. Finally, take it out and let it cool down to obtain a 1.5um thick PDMS film. Test the spectrum by infrared and visible spectrometers, and subtract the appropriate size to test the actual cooling effect.

Embodiment 3

[0014] Embodiment 3: The preparation method of organic matter and particulate matter precursor solution is the same as that of Embodiment 1, and the particles used are 100nm TiO 2 . Then start the sample preparation: lay the aluminum foil flat on the surface of the flat plate of the film scraper, spray the prepared particle dispersion on the aluminum foil, and then place it in a fume hood to dry naturally for 20 minutes. Then PDMS was sprayed on the surface of the sample, and the coated film was put into an oven for curing at 100 degrees Celsius for one hour. Finally, take it out and let it cool down to obtain a 1.5um thick PDMS film. Test the spectrum through infrared and visible spectrometers, and cut the appropriate size to test the actual cooling effect.

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Abstract

The invention discloses a low-cost large-scale-application radiation refrigeration thin film and a preparing method. A material system comprises a metal thin film layer and an inorganic particle and organic matter mixing layer from bottom to top, the thin film system has the advantages of being high in radiation efficiency, small in sunlight energy absorbing, and capable of achieving wide-angle radiation, the sunlight energy average reflectivity can reach up to 90%, the atmospheric window average radiance can be up to 92%, the radiation refrigeration material can achieve the cooling effect lower than the outside by about 8 DEG C, the process is simple, cost is low, large-area preparing is achieved, a series of advantages of flexibility, water draining and the like are achieved, and the film can be used for many fields of buildings, vehicles, spaceflight and the like.

Description

technical field [0001] The invention relates to the technical field of temperature control materials, and relates to a low-cost and large-area radiative cooling film material and a preparation method thereof. Background technique [0002] With the rapid development of human society, the demand for energy is also increasing. Refrigeration accounts for an extremely large proportion of human energy consumption. Faced with such a huge energy consumption, people began to be interested in the research and development of low-energy or zero-energy products, hoping to build a greener life style. [0003] Given that the cosmic background can be regarded as a huge cryogenic container, the thermal radiation of the objects on the earth's surface to the cosmic background is the main reason for its cooling. Through appropriate material selection and structural design, the heat on the surface of the object is released out of the atmosphere in the form of long-wave infrared (8-13um) therma...

Claims

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Application Information

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IPC IPC(8): B05D7/14B05D7/24B05D5/06B05D5/00F25B23/00C23C14/24C23C14/18
CPCB05D7/14B05D7/24B05D7/544B05D7/542B05D5/063B05D5/00F25B23/003C23C14/24C23C14/18B05D2202/25B05D2451/00B05D2518/12B05D2401/20B05D2401/10B05D2420/02
Inventor 郝加明李世民文政绩许昊孙艳邓惠勇戴宁
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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