Vanadium dioxide composite powder and preparation method thereof

A technology of vanadium dioxide and composite powder, which is applied in the direction of vanadium oxide, chemical instruments and methods, vanadium compounds, etc., can solve the problems of destroying the structure of vanadium dioxide, and no modification method is proposed, so as to achieve the innovation of preparation process and the improvement of chemical Stability and dispersibility, effect of changing surface properties

Inactive Publication Date: 2013-05-01
佛山金智节能膜有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Chinese patent application number: 200610117027.4 mentions a preparation method of vanadium dioxide suspension, which involves the dispersion treatment of vanadium dioxide powder, but it adopts the method of inorganic modification, which is different from the organic modification scheme adopted by the present invention The preparation of vanadium dioxide composite particles is essentially different, and the use of acidic or alkaline conditions in the invention will destroy the structure of vanadium dioxide
[0007] Chinese Pate

Method used

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  • Vanadium dioxide composite powder and preparation method thereof
  • Vanadium dioxide composite powder and preparation method thereof
  • Vanadium dioxide composite powder and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Take the mass of each component as follows:

[0054] Vanadium dioxide nanopowder (doped with tungsten, particle size 20-100nm), 20g

[0055] Ethanol (dispersion medium), 80g

[0056] Silane coupling agent (containing polyvinyl alcohol group, organic modifier), 1g

[0057] Polyvinylpyrrolidone (dispersion aid), 0.05g;

[0058] Firstly, vanadium dioxide nanopowder and dispersion medium were stirred and dispersed at a high speed of 1500rad / min for 30 minutes, and ultrasonically dispersed for 30 minutes, then the dispersion aid and silane coupling agent were added to it, and stirred at a constant temperature of 70°C on a high-speed mixer for 2 hours , then centrifuged and precipitated, and vacuum dried at 60°C to obtain a vanadium dioxide composite powder modified by an organosilicon coupling agent;

[0059] The main properties of the obtained vanadium dioxide and its doped composite powder are shown in Table 1.

[0060] Such as figure 2 As shown, the morphology of th...

Embodiment 2

[0062] Take the mass of each component as follows:

[0063] Vanadium dioxide nanopowder (without doping, particle size 20-60nm), 10g

[0064] Ethanol (dispersion medium), 90g

[0065] Stearic acid, 1g

[0066] Polyvinyl alcohol (dispersion aid), 0.05g

[0067] First, the vanadium dioxide nanopowder and dispersion medium were stirred and dispersed at a high speed of 1500rad / min for 30 minutes, and ultrasonically dispersed for 30 minutes, then the dispersion aid and stearic acid were added, and stirred at a constant temperature of 60°C on a high-speed mixer for 2 hours. Centrifuge again, dry under vacuum at 60°C to obtain stearic acid-modified vanadium dioxide nanocomposite powder;

[0068] The main properties of the obtained vanadium dioxide and its doped composite powder are shown in Table 1.

Embodiment 3

[0070] Take the mass of each component as follows:

[0071] Vanadium dioxide nanopowder (doped with tungsten, particle size 20-100nm), 15g

[0072] Isopropanol (dispersion medium), 85g

[0073] Silane coupling agent (containing long chain alkyl, organic modifier), 1g

[0074] Organomodified polysiloxane dipropylene glycol monomethyl ether solution (dispersion aid), 0.08g

[0075] First disperse the vanadium dioxide nano-powder and the dispersion medium at a high speed of 1000rad / min for 20 minutes, and ultrasonically disperse it for 60 minutes, then add the dispersion aid and silane coupling agent, and stir for 2 hours on a high-speed mixer at a constant temperature of 80°C , centrifuged and precipitated, vacuum dried at 60°C to obtain vanadium dioxide nanocomposite powder with long-chain alkyl attached to the surface;

[0076] The main properties of the obtained vanadium dioxide and its doped composite powder are shown in Table 1.

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Abstract

The invention relates to vanadium dioxide composite powder and a preparation method thereof. The vanadium dioxide composite powder comprises vanadium dioxide nano-powder with a chemical composition of V1-xMxO2, and organic modification long-chain molecules are grafted on the surface of the vanadium dioxide nano-powder. M is a doping element, and x is no smaller than 0 and no greater than 0.5. According to the vanadium dioxide composite powder provided by the invention, the surface of the vanadium dioxide nano-powder is subjected to organic modification, such that chemical stability and dispersibility of the vanadium dioxide powder are greatly improved.

Description

technical field [0001] The invention relates to vanadium dioxide powder in the fields of chemical industry and materials and a preparation method thereof, in particular to an organically modified intelligent vanadium dioxide composite powder and a preparation method thereof. The product of the invention can be applied to the preparation of intelligent energy-saving coatings, and can also be used in heat insulation occasions such as glass and external walls. Background technique [0002] my country's building energy consumption has accounted for 27.8% of the total energy consumption of the society, of which heating and air conditioning energy consumption accounted for 55% of the total building energy consumption. In modern buildings, glass accounts for an increasing proportion of the external wall area. It is estimated that the heat transfer through glass windows accounts for 48% and 71% respectively in winter and summer. If the air conditioner is used to adjust the indoor t...

Claims

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Application Information

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IPC IPC(8): C09D7/12C09C1/00C09C3/08C09C3/10
CPCC09C3/10C09C1/00C09C1/0006C01P2004/64C01G31/00C01P2002/52C01P2004/03C09D7/12C01G31/02C09C3/08B82Y30/00
Inventor 罗宏杰刘奕燎高彦峰蔡朝辉林裕卫曹传祥王少博金平实
Owner 佛山金智节能膜有限公司
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