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Modified vanadium dioxide dispersion as well as preparation method and application thereof

A technology of vanadium dioxide and dispersion, applied in vanadium oxide, coating and other directions, can solve the problems of poor dispersion stability of vanadium dioxide nano-powder, affecting specific performance, etc., and achieve excellent dispersion stability, short production cycle, and easy operation. simple craftsmanship

Pending Publication Date: 2022-04-19
SHENZHEN MEIXINLONG CAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is: the dispersion stability of vanadium dioxide nanopowder in liquid phase is relatively poor, affects its specific performance

Method used

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  • Modified vanadium dioxide dispersion as well as preparation method and application thereof
  • Modified vanadium dioxide dispersion as well as preparation method and application thereof
  • Modified vanadium dioxide dispersion as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Add 100ml of deionized water to the beaker, then add 4gV 2 o 5 and 10ml of hydrochloric acid, stirred with a glass rod until completely dissolved, bathed in water at 60°C for 1 hour, then added 8g of oxalic acid, continued to heat until the solution turned blue, then injected nitrogen, added 5.85g of sodium hydroxide until the pH of the solution reached 7.5, washed with water and filtered, A gray precipitate was obtained. Transfer the gray precipitate to a 200ml reaction kettle, add 120ml of deionized water (60% filling), stir evenly, put it in an oven at 220°C for 48 hours, take out the reaction kettle and cool it to room temperature to obtain a dark blue turbid solution. The solution is washed, filtered and dried to obtain vanadium dioxide powder; and then continue to prepare a sufficient amount of vanadium dioxide powder according to the above method for future use. The prepared vanadium dioxide was annealed at 550°C for 1h. Add 30g of AC-3122 modified styrene acr...

Embodiment 2

[0044] Add 100ml deionized water to the beaker, then add 5gV 2 o 5 and 14ml of hydrochloric acid, stirred with a glass rod until completely dissolved, bathed in water at 80°C for 1.5h, then added 10g of oxalic acid, continued to heat until the solution turned blue, then injected nitrogen, added 7.67g of sodium hydroxide until the pH of the solution reached 6.5, washed with water and filtered, A gray precipitate was obtained. Transfer the gray precipitate to a 200ml reactor, add 160ml of deionized water (filling degree is 80%), stir evenly, put it in an oven at 230°C for 48 hours, take out the reactor and cool it to room temperature to obtain a dark blue turbid solution, The solution is washed, filtered and dried to obtain vanadium dioxide powder; and then continue to prepare a sufficient amount of vanadium dioxide powder according to the above method for future use. The prepared vanadium dioxide was annealed at 600°C for 1.5h. Add 35g of AC-3122 modified styrene acrylic aci...

Embodiment 3

[0046] Add 100ml deionized water to the beaker, then add 4.5gV 2 o 5 and 12ml of hydrochloric acid, stirred with a glass rod until completely dissolved, bathed in water at 70°C for 1 hour, then added 9g of oxalic acid, continued to heat until the solution turned blue, then injected nitrogen, added 6.76g of sodium hydroxide until the pH of the solution reached 8.5, washed with water and filtered to obtain Gray precipitation. Transfer the gray precipitate to a 200ml reaction kettle, add 140ml of deionized water (70% filling), stir evenly, put it in an oven at 220°C for 48 hours, take out the reaction kettle and cool it to room temperature to obtain a dark blue turbid solution. The solution is washed, filtered and dried to obtain vanadium dioxide powder; and then continue to prepare a sufficient amount of vanadium dioxide powder according to the above method for future use. The prepared vanadium dioxide was annealed at 550°C for 1.5h. Add 40g of AC-3122 modified styrene acryli...

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Abstract

The invention belongs to the field of functional nano composite materials, and particularly relates to a modified vanadium dioxide dispersion as well as a preparation method and application thereof. The modified vanadium dioxide dispersoid is a dispersed particle system formed in a polyvinyl alcohol aqueous solution after vanadium dioxide is acted by a modifier, and the mass ratio of vanadium dioxide to the modifier is (1-5): 1; the obtained dispersion is excellent in dispersion stability, has a relatively strong infrared adjusting function, is simple in preparation process, short in production period, low in cost and easy for industrial production, and has great application value in the fields of water-based paint and coatings.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a modified vanadium dioxide dispersion and a preparation method and application thereof. Background technique [0002] Vanadium dioxide can undergo a heat-induced reversible semiconductor-metal phase transition around 70 °C. Before and after the phase transition, the resistance of the material changes by more than 4 orders of magnitude, and the infrared transmittance also changes significantly. This phase change characteristic of vanadium dioxide makes it have broad application prospects in energy-saving windows, optical storage, thermal switches, laser protection, infrared imaging simulation, etc. [0003] At present, the preparation process of vanadium dioxide powder materials is diversified, and on the basis of powder material preparation, the development of vanadium dioxide ceramics, vanadium dioxide-based composite material coatings, and vanadium dioxide thin films are all...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08K3/22C08K9/04C09D7/62C01G31/02
CPCC08K3/22C08K9/08C09D7/62C01G31/02C08L29/04
Inventor 吴彦伦曾阿梅方长青程有亮
Owner SHENZHEN MEIXINLONG CAN CO LTD
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