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Temperature-sensitive chromic material

A temperature-sensitive color-changing and sensitive technology, applied in the field of materials, can solve problems such as high energy consumption and opacity, and achieve the effects of reducing heat and good transparency

Active Publication Date: 2016-07-20
CHONGQING HEWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned technology is passive discoloration, requires an external power supply, has high energy consumption, and is opaque when the power is off, and light is transparent when the power is on, which cannot well meet the needs of building doors and windows.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] a) Weigh 0.5g~0.9g polyoxyethylene-polyoxypentene-polyoxyethylene block copolymer, 0g~5g methylcellulose, 0~0.5g sodium lauryl sulfate and dissolve them in 100ml deionized In water, stir evenly, vacuum defoam, pour into 2mm thick glass cavity and seal.

[0050] b) The obtained film is colorless and transparent at room temperature, starts to change color at 25°C to 40°C, and completely devitrifies at 30°C to 50°C.

[0051] Here, it should be noted that "completely devitrified" means that the light transmittance is less than 5% (the same below).

Embodiment 2

[0053] a) Weigh 2g of agar, add it into 100ml of water, heat and stir at 120°C until completely dissolved;

[0054] b) Weigh 0.75g of polyoxyethylene-polyoxypropylene-polyoxyethylene block copolymer, add it to 50ml of water, and stir at room temperature until uniformly dispersed;

[0055] c) Mix the solution obtained in step b into the agar solution obtained in step a, stir at 120° C. for 5 minutes, pour into a mold and cool at room temperature to form a film;

[0056] d) The obtained film is colorless and transparent at room temperature at 25°C, starts to change color at 30°C, and completely devitrifies at 35°C.

Embodiment 3

[0058] a) Weigh 0.5-1g of polyoxyethylene-polyoxybutylene-polyoxyethylene block copolymer, add 3.5g-15g of 2-acrylamide-2-methylpropanesulfonic acid into 100ml of water, and stir evenly;

[0059] b) Weigh 1.2g to 5g of sodium carbonate to adjust the pH to neutral;

[0060] c) The solution obtained in step b is mixed with 3.5g-15g acrylamide, 0.01-0.3g sodium lauryl sulfate, 0.03-0.3g N,N'-methylenebisacrylamide, and stirred evenly;

[0061] d) Mix 0.3g to 0.6g of sodium bisulfite and 0.65g to 1.3g of ammonium persulfate into the solution obtained in step c, and vacuum defoam after stirring evenly;

[0062] e) Pour the obtained solution into a closed container to solidify at room temperature to form a film; f) The obtained film is colorless and transparent at 30°C to 50°C, and completely devitrified at 40°C to 70°C.

[0063] The temperature-sensitive color-changing material according to the embodiment of the present invention has the feature of intelligently adjusting light an...

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PUM

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Abstract

The invention discloses a temperature-sensitive chromic material. The temperature-sensitive chromic material is prepared from 0.5 to 2 percent of temperature-sensitive macromolecules by mass; 0 to 30 percent of film-forming monomers by mass; 0 to 5 percent of thickening agent by mass; 0 to 1 percent of dispersing agent by mass; 0 to 0.5 percent of cross-linking agent by mass; 0 to 3 percent of oxidizing agent by mass; 0 to 1 percent of reducing agent by mass, wherein a solvent of the temperature-sensitive chromic material is water. The temperature-sensitive chromic material according to the invention has the characteristic of intelligent light ray and heat adjustment according to temperature, not only can reduce heat penetrating through sunlight, but also can keep good transparency, and is applicable to various places such as dwellings, office buildings and greenhouses where temperature and light rays need to be adjusted.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a temperature-sensitive color-changing material. Background technique [0002] With the rapid development of the economy, energy saving and environmental protection have become the theme of the times. The dimming film made of intelligent temperature-sensitive color-changing materials can change its transmission behavior to sunlight as the environment changes, which can not only significantly reduce the heat transmitted in sunlight, but also maintain good transparency, so it is more and more popular. attention. [0003] In related technologies, relatively mature dimming films include electronically controlled liquid crystal films, which are liquid crystal films made of PVB / EVA (wherein, PVB is polyvinyl butyral, which is the English abbreviation of polyvinylbutyral; EVA is ethylene-vinyl acetate (acetic acid) Ethylene) ester copolymer, English is: EthyleneVinylAcetate, referre...

Claims

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Application Information

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IPC IPC(8): C08L1/28C08L5/12C08L71/02C08J5/18C08F283/06C08F220/58C08F220/56C08F222/38
CPCC08F283/06C08J5/18C08J2305/12C08J2351/08C08J2471/02C08L1/28C08L5/12C08L2203/16C08L71/02C08F220/585
Inventor 温维佳况婷钱德伟刘伟
Owner CHONGQING HEWEI TECH CO LTD
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