Intelligent heat-insulating film and its preparing process

A technology of intelligent heat insulation and thermal insulation film, which is applied in coatings, fireproof coatings, polyester coatings, etc., can solve the problems of difficult film production, expensive equipment, difficult vanadium valence and crystal form, etc., to facilitate construction and reduce air conditioning Good energy consumption and transparency

Inactive Publication Date: 2008-09-17
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods have many disadvantages, such as: expensive equipment, ordinary glass or plastic can not withstand high temperature, it is difficult to control the valence state and crystal form of vanadium, it is difficult to make a large-area film, and the gel film produces pores, etc.
[0006] However, its application is limited due to its resistance phase transition temperature of 68°C higher than room temperature. Therefore, the resistance mutation temperature can be reduced, and the phase transition temperature can be reduced by doping other metal elements into vanad

Method used

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  • Intelligent heat-insulating film and its preparing process
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  • Intelligent heat-insulating film and its preparing process

Examples

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Example Embodiment

[0038] Example 1:

[0039] In a beaker, control the temperature at 50°C, and at 500 rpm, prepare 100ml of 0.5mol / L vanadyl sulfate aqueous solution, 100ml of 4mol / L sodium bicarbonate aqueous solution, and 30ml of 0.5mol / L potassium molybdate aqueous solution at 500rpm speed. In a reactor equipped with a stirrer, dropping funnel, and condenser, at 500 rpm, the temperature is controlled at 40-50°C, the vanadyl sulfate aqueous solution and the potassium molybdate aqueous solution are mixed and stirred for 20 minutes, and the temperature is maintained at 40-50°C. After 3-4 hours dropwise addition of sodium bicarbonate aqueous solution, a hydrated hydroxide precipitate is obtained, which is filtered and washed with water until there is no SO 4 2- , Then wash 1-2 times with methyl amyl ketone, in a nitrogen atmosphere, place the obtained doped amorphous precursor in a muffle furnace, heat up to 400-500 ℃ for high temperature sintering for 10 hours to obtain doped Vanadium dioxide.

Example Embodiment

[0040] Example 2:

[0041] In a beaker, control the temperature at 10-20°C, and at 200rpm speed, respectively prepare 100ml of 0.1mol / L vanadyl sulfate aqueous solution, 200ml of 0.01mol / L sodium hydroxide aqueous solution, 40ml of 0.1mol / L ammonium tantalate, 40ml of 0.01mol / L aluminum chloride aqueous solution, in a reactor equipped with a stirrer, dropping funnel, and condenser, at a speed of 500rpm, control the temperature to 10-20℃, and mix the vanadium sulfate aqueous solution and the ammonium tantalate aqueous solution , The aluminum chloride aqueous solution is mixed and stirred for 20 minutes, and the temperature is maintained at 10-20℃. After the sodium hydroxide aqueous solution is added dropwise in 5-6 hours, the hydrated hydroxide precipitate is obtained. The precipitate is filtered and washed with water until there is no SO 4 2- , Then wash 1-2 times with ethanol, put the doped amorphous precursor in a vacuum oven at 40°C for 6 hours, place it in a muffle furnace in...

Example Embodiment

[0042] Example 3:

[0043] In a beaker, control the temperature at 10-20°C, and at 1000 rpm, prepare 100ml of 5mol / L vanadyl sulfate aqueous solution, 100ml of 10mol / L sodium acetate aqueous solution, 20ml of 1mol / L ammonia aqueous solution, and 1ml of 0.5mol / L aqueous solution. L potassium tungstate, 1ml 0.5mol / L titanium oxychloride aqueous solution, 1ml 0.1mol / L ammonium molybdate aqueous solution, in a reactor equipped with a stirrer, dropping funnel, and condenser, at 500rpm, Control the temperature at 70-80℃, mix the vanadyl sulfate aqueous solution, potassium tungstate aqueous solution, titanyl chloride aqueous solution, and ammonium molybdate aqueous solution for 20 minutes, keep the temperature at 70-80℃, and add sodium acetate aqueous solution dropwise within 1-2 hours Mixture with ammonia water solution to obtain hydrated hydroxide precipitate, precipitate and filter, wash with water until there is no SO 4 2- , The obtained doped amorphous precursor is dried in an oven...

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Abstract

The invention relates to an intelligent heat-insulating film and a preparation method thereof. The invention adopts the mixture of phase transition intelligent nanometer powder in the rutile crystal structure and vanadium dioxide V1-XO2(X is more than 0 and less than 0.06) to uniformly disperse on a material which can be formed into films, thus preparing the intelligent heat-insulating film with the phase transition function. The intelligent heat-insulating film is a novel energy-saving material with the phase transition temperature adjustable within -10 DEG C to 70 DEG C. The film has high infrared transmittance and low reflectivity as well as excellent heat-insulating property at low temperatures. At high temperatures, the film has low infrared transmittance and high reflectivity as well as excellent heat insulating effect. The intelligent heat-insulating film can be used for heat-insulation and decorative-protection of the surfaces such as glass, plastic, metal, wood, concrete and so on.

Description

technical field [0001] The invention relates to the fields of chemical industry and materials, in particular to an intelligent thermal insulation film with adjustable phase transition temperature and a preparation method thereof. Background technique [0002] In order to reduce solar radiation and achieve the purpose of saving energy, people use various methods to change the light transmission performance of materials. Automobile glass film can block sunlight radiation, reduce the damage of ultraviolet rays to the human body, reduce the temperature of the surfaces and air in the car, slow down the aging of facilities in the car, improve the riding environment of the passengers, and reduce the fuel consumption of the car. Some building energy-saving glass also achieves the purpose of blocking sunlight radiation and reducing air-conditioning energy consumption by coating metal film (aluminum, silver, etc.). [0003] Existing studies have shown that some metal oxides have good...

Claims

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Application Information

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IPC IPC(8): C09D5/18C09D7/12C09D133/02C09D175/04C09D167/00C09D183/04
Inventor 武利民顾广新游波施剑秋周树学
Owner FUDAN UNIV
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