A high-performance vanadium dioxide-based thermochromic composite material

A thermochromic material, vanadium dioxide-based technology, applied in the direction of color-changing fluorescent materials, heat-sensitive coatings, chemical instruments and methods, etc., can solve the problems of inability to change visually, have no adjustment function, and do not help customers to demonstrate the adjustment effect , to achieve the effect of high total solar regulation rate and yellow hair color suppression

Active Publication Date: 2019-01-29
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (1) It has a relatively high adjustment range for the solar infrared band, but has almost no adjustment effect on the visible light band, which accounts for 50% of the total solar energy, and as a result reduces the total solar adjustment rate;
[0010] (2) Since there is no obvious adjustment effect in the visible light band, this adjustment cannot be used to produce sufficient visual changes, which is not conducive to a strong adjustment effect demonstration for customers, and has a decisive adverse effect on product publicity and promotion. ;
[0011] (3) It has a strong absorption effect on short-wavelength visible light, resulting in yellow coloring of the film
[0012] So far, there is no mature technology to fundamentally solve the above-mentioned problems

Method used

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  • A high-performance vanadium dioxide-based thermochromic composite material
  • A high-performance vanadium dioxide-based thermochromic composite material
  • A high-performance vanadium dioxide-based thermochromic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] First prepare 100ml of vanadium pentoxide solution containing 0.01mol / L, add 0.01g of oxalic acid and stir to form a uniform solution. Put the above solution into the reaction kettle and seal it, and react at 240°C for 24h. After cooling, take it out, centrifuge, wash and dry to obtain vanadium dioxide powder.

[0072] Take 0.5g of the vanadium dioxide nano-powder and 0.25g of polyvinylpyrrolidone prepared by the above-mentioned hydrothermal treatment, add them into 100g of ethanol, stir and ultrasonically disperse for 30min, transfer the dispersion to a ball mill tank, and ball mill for 1h under the condition of 900r / min to obtain two vanadium oxide ethanol dispersion; add 10g polyvinyl butyral to the above dispersion, stir until dissolved; continue to add 6.5g nickel perchlorate, 6g neopentyl glycol and 24g tetrabutylammonium bromide, stir until completely dissolved and Mix evenly; keep stirring the above-mentioned dispersion liquid at 90°C for 30 minutes to obtain a...

Embodiment 2

[0080] First prepare 100ml of vanadyl sulfate solution containing 0.01mol / L, add 5g of hydrazine monohydrate with a mass fraction of 10%, then use sodium hydroxide to titrate to pH 7 to form a suspension, filter and wash the precipitate and disperse it again in 100mL Stir in water to form a homogeneous solution. Put the above solution into the reaction kettle and seal it, and react at 260°C for 24h. Take it out after cooling, add 0.1g of glucose into the reactor, close the reactor, react at 180°C for 8h and cool to room temperature, centrifuge, wash and dry to obtain carbon-coated vanadium dioxide powder.

[0081] Take 1g of carbon-coated vanadium dioxide nanopowder and 0.5g of polyvinylpyrrolidone prepared by the above-mentioned hydrothermal treatment, add them into 100g of acetone, stir and ultrasonically disperse for 30min, then transfer the dispersion to a ball mill tank, and ball mill for 1h under the condition of 900r / min Obtain vanadium dioxide acetone dispersion liqui...

Embodiment 3

[0086] First prepare 100 ml of vanadium pentoxide solution containing 0.01 mol / L, add 0.005 g of tungsten trioxide and 0.5 g of hydrazine monohydrate with a mass fraction of 10%, and stir to form a uniform solution. Put the above solution into the reaction kettle and seal it, and react at 260°C for 24h. After cooling, take it out, centrifuge, wash and dry to obtain vanadium dioxide powder.

[0087] Take 0.5g of the vanadium dioxide nano-powder and 0.25g of polyvinylpyrrolidone prepared by the above-mentioned hydrothermal treatment, add them into 100g of acetone, stir and ultrasonically disperse for 30min, then transfer the dispersion to a ball mill tank, and ball mill for 1h under the condition of 900r / min to obtain two Vanadium oxide acetone dispersion; add 10g polymethyl methacrylate to the above dispersion, stir until dissolved; continue to add 4g cobalt bromide, 5g trimethylolpropane and 24g tetrabutylammonium bromide, stir until completely dissolved and Mix evenly; keep ...

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Abstract

The invention relates to a high-performance vanadium-dioxide-based thermochromism composite. The high-performance vanadium-dioxide-based thermochromism composite comprises vanadium dioxide serving as an inorganic system thermochromic material and a dentate tronsformting body serving as an organic system thermochromic material, and the dentate tronsformting body comprises convertible metal ions, low absorbance ligands capable of forming low absorbance complexes with the convertible metal ions and high absorbance ligands capable of forming high absorbance complexes with the convertible metal ions. The high-performance vanadium-dioxide-based thermochromism composite has the advantages that the thermochromism wave band covers the whole solar radiation spectrum including visible light, and an extremely high total solar radiation adjustment rate is achieved compared with a traditional vanadium dioxide thermochromism material.

Description

technical field [0001] The invention belongs to the technical field of high-performance inorganic-organic composite materials, and in particular relates to thermochromic materials and their energy-saving and environment-friendly applications. Background technique [0002] The problem of global energy shortage is becoming more and more serious, and excessive carbon emissions are causing the environment to deteriorate day by day. Energy conservation and emission reduction have become the top priority of all countries. It is estimated that building energy consumption accounts for more than 30% of the total energy consumption in society. Therefore, promoting building energy conservation is one of the key measures for energy conservation, emission reduction, and sustainable development. [0003] A large part of building energy consumption is used for air conditioning, and glass windows, as the main channel for heat exchange between buildings and the outside world, have become the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D129/14C09D133/12C09D5/26C03C17/32C03C17/30C09K9/00
CPCC08K2201/011C09D5/26C09D129/14C09D133/12C09K9/00C08L39/06C08K3/22C08K5/053C08K5/19C08K9/10
Inventor 金平实朱婧婷包山虎纪士东
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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