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Normal temperature temperature-sensitive infrared absorption reflective reversible conversion combinatorial material

A combination of materials and infrared absorption technology, applied in building materials, layered products, roofs using tiles/slate tiles, etc., can solve the problems of price and space constraints, and achieve the effect of low price, wide range of sources, and simple processing and production

Inactive Publication Date: 2010-06-23
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods have achieved good results in creating a thermally comfortable environment for buildings, but they are limited by price and space in actual promotion.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The lower layer is made of materials with an absorption rate of 0.95 for solar infrared radiation, such as phthalocyanine dyes and aromatic methane dyes. The 18°C ​​intelligent sunshade material (thickness is about 3mm) is formed by overlapping. The infrared absorption rate of this composite material can reach 90% at low temperature and 10% at high temperature, and the conversion temperature is about 18°C.

[0015] The intelligent sunshade material is a Chinese invention patent "a material with reversible change in temperature-induced light transmittance", patent number ZL200410067054.6), first polystyrene, oxidized polypropylene, polyvinyl alcohol, hydroxyethyl cellulose, hydroxypropyl One or several kinds of materials such as cellulose are dissolved in water according to the following mass ratio, and then one or several kinds of inorganic salts such as Na, K, Ca, Mg are dissolved in water according to a certain mass ratio, and then the two The aqueous solution is mixe...

Embodiment 2

[0018] The material of the lower layer adopts materials with an absorption rate of 0.98 for solar infrared radiation, such as silver nanomaterials, nickel-phosphorus alloy thin films, etc. The smart sunshade material (thickness is about 3mm) with a temperature of about 18°C ​​is overlapped and formed. The smart sunshade material is made by Chinese invention patent ZL200410067054.6.

[0019] After testing, the combination material has the strongest radiation in the 0.4-0.8μm wavelength region, and the energy contained is about 640W / m2. Therefore, the absorption of light quanta in the 0.4-0.8μm wavelength region is the key in solar energy utilization. However, the energy in the infrared region of solar radiation energy accounts for about 50%, which cannot be ignored. It should be dealt with by disposing part of the energy of the visible light of the sun. That is, it is necessary to study the reversible conversion material of infrared absorption and reflection at room temperature....

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Abstract

The invention discloses a normal temperature temperature-sensitive infrared absorption reflective reversible conversion combinatorial material, which relates to a building energy-saving combinatorial material. The combinatorial material is formed by overlapping and combining an upper layer material and a lower layer material, wherein the lower layer adopts a high-absorption material such as a phthalocyanine dye, an arylmethane dye, a silver nano-material or a nickel-phosphonium alloy film and the like which has an effect of absorbing 95 to 98 percent of sunlight infrared radiations; and the upper layer adopts a material capable of performing reversible conversion on the transmittance of the infrared radiations, the material capable of performing the reversible conversion has the transmittance of 90 percent of the transmittance of the infrared radiations at a low temperature and the transmittance of 0 to 10 percent of the transmittance of the infrared radiations at a high temperature, and an intelligent sunshade material is generated at the temperature of about 18 DEG C when the material capable of performing the reversible conversion has high temperature and low temperature characteristics. The normal temperature temperature-sensitive infrared absorption reflective reversible conversion combinatorial material has the performance of absorbing a large quantity of sunlight infrared energy at the low temperature, reflecting a large quantity of the sunlight infrared energy at the high temperature, and having a reversion temperature of about 18 DEG C for the two different characteristics, has the advantages of wide material sources, low price, simple processing and manufacturing, convenient use, no toxicity and harms to the environment, and great economic and social benefits.

Description

technical field [0001] The invention relates to a temperature-induced infrared absorption and reflection reversible conversion composite material at room temperature, which belongs to the technical field of material science and engineering science. Background technique [0002] Warm in winter and cool in summer has been the dream of human beings since ancient times. Unfortunately, in reality, it is often cold in winter and hot in summer. It is difficult for the building itself to achieve the effect of warm in winter and cool in summer due to its own limitations. Since modern times, with the advancement of science and technology, the construction industry has also entered a stage of rapid development. Various new technologies and new materials have been successfully applied to buildings, which have greatly improved the functions of buildings, and the human living environment has become more and more comfortable. , but the most common way to create a thermally comfortable envi...

Claims

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Application Information

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IPC IPC(8): E04C2/02E04D13/18B32B5/14
Inventor 马一平
Owner TONGJI UNIV