Preparation method of vanadium dioxide-zinc sulfide core-shell structure nano material and heat insulation coating

A technology of vanadium dioxide nanometer and vanadium dioxide, which is applied in the preparation of vanadium dioxide-zinc sulfide core-shell structure nanomaterials and in the field of thermal insulation coatings. Width and change range and other issues to achieve the effects of improved dispersion and stability, high thermal insulation performance, and reduced building energy consumption

Inactive Publication Date: 2021-01-19
ASIA PAINT SHANGHAI
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  • Description
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AI Technical Summary

Problems solved by technology

However, the doping of tungsten will lead to the degradation of visible light transmittance and solar energy regulation efficiency, which is not conducive to the application of intelligent temperature control; moreover, the temperature control of vanadium dioxide is related to the V-V unipolar bond formed by the pairing of vanadium atoms , when the V in the vanadium dioxide crystal 4+ After the ions are replaced by dopant ions, the original V-V atom pairs in the system will be destroyed, and its energy band structure characteristics will also be changed, making the insulator phase of vanadium dioxide unstable, and finally leading to a change in its phase transition temperature; in addition, Doping will also affect the growth of the film, thereby affecting the crystallinity and grain size of the grains, and then affecting the width and range of the phase transition of the vanadium dioxide coating film, etc.
Therefore, while doping can effectively control the phase transition temperature of vanadium dioxide, it will also significantly weaken or even eliminate the superior electrical and optical mutation characteristics of vanadium dioxide. This problem limits the application of doping technology in vanadium dioxide nanometer temperature control application of materials

Method used

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  • Preparation method of vanadium dioxide-zinc sulfide core-shell structure nano material and heat insulation coating
  • Preparation method of vanadium dioxide-zinc sulfide core-shell structure nano material and heat insulation coating

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preparation example Construction

[0038] The second aspect of the present invention provides a method for preparing a vanadium dioxide-zinc sulfide core-shell nanomaterial, comprising the following steps:

[0039] S101: Disperse the vanadium dioxide nanomaterial in water to make a suspension;

[0040] Further, in step S101, the particle size of the vanadium dioxide nanomaterial is 30-60nm; in step S101, the particle size of the vanadium dioxide nanomaterial is 50nm;

[0041] Further, in step S101, 5-10 mL of water is added to every 1 g of vanadium dioxide nanomaterials;

[0042] Further, in step S101, the water is ultrapure water;

[0043] Further, in step S101, an ultrasonic method is used to promote the formation of the suspension;

[0044] S102: mixing the suspension with mercaptoalkanoic acid to prepare modified vanadium dioxide nanoparticles;

[0045] Further, in step S102, the mercaptoalkanoic acid is mercapto C 1-16 Alkyl acid; further, mercaptoalkanoic acid is one or more of mercaptoacetic acid, me...

Embodiment 1

[0092] (1) Preparation of vanadium dioxide-zinc sulfide core-shell nanomaterials

[0093] First, ultrasonically disperse 10 g of vanadium dioxide nanopowder in 50 mL of ultrapure water to obtain a well-dispersed suspension; then, under vigorous stirring, add 12 g of mercaptopropionic acid into the suspension and stir at 50 °C 1h, make the mercapto group fully adsorbed on the surface of the vanadium dioxide nanoparticles; then centrifuge the mixture at 8000rpm for 5min to concentrate, remove the supernatant, disperse the separated nanoparticles in the PVP aqueous solution, and stir the mixed solution vigorously for 15min; then add 1.20g of zinc acetate dihydrate and 0.35g of thioacetamide were allowed to react at 90°C for 0.5-2h; finally the final product was collected by centrifugation, washed three times with ultrapure water and absolute ethanol successively, and dried at 80°C Vacuum dried for 12 hours to obtain the core-shell structure nanomaterials.

[0094] (2) Thermal in...

Embodiment 2

[0099] Substantially the same as Example 1, the difference is that the parts by weight of each component are different, and the specific formula is as follows:

[0100] 60 parts of nano-ceramic resin, 10 parts of infrared radiation nano-powder, 15 parts of vanadium dioxide-zinc sulfide core-shell structure nano-material, 1 part of ultraviolet light absorber, 0.6 part of dispersant, 0.4 part of defoamer, 0.2 part of fungicide and 0.3 parts of stabilizer.

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Abstract

The invention relates to a preparation method of a vanadium dioxide-zinc sulfide core-shell structure nano material and a thermal insulation coating, and the preparation method of the vanadium dioxide-zinc sulfide core-shell structure nano material comprises the following steps: dispersing a vanadium dioxide nano material in water to prepare a suspension; mixing the suspension with mercapto-alkylacid to prepare modified nano particles; and mixing the modified nano particles, a surfactant, water, a zinc source and a sulfur source, carrying out a reaction, carrying out solid-liquid separation after the reaction is completed, collecting the solid, and drying to prepare the vanadium dioxide-zinc sulfide core-shell structure nano material. The vanadium dioxide-zinc sulfide core-shell structurenano material obtained by the preparation method has high stability and dispersibility, and can effectively improve the intelligent temperature regulation and control effect of the heat insulation coating.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a preparation method of a vanadium dioxide-zinc sulfide core-shell nanomaterial and a heat-insulating coating. Background technique [0002] With the rapid development of society and economy, energy and environment have become the bottleneck restricting the development of human society today. Building energy consumption accounts for about 30% to 40% of the total energy consumption of human beings, about half of which is caused by air conditioning such as building heating or cooling, and the heat lost through doors and windows accounts for about 30% of the energy consumption of air conditioning in the entire building. How to improve the thermal insulation performance of glass while daylighting has become an important way to reduce building energy consumption. [0003] In recent years, thermochromic materials will change the infrared transmittance due to the change of crystal str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/08C09C3/06C09D1/04C09D5/32C09D7/62C09D175/04C09D5/16
CPCC09C1/00C09C3/08C09C3/063C09C3/006C09D1/04C09D5/32C09D7/62C09D175/04C09D5/1687C08K2003/3036C08L2201/08C08L2201/10C08K9/10C08K3/22C08K3/30C08K5/5399C08K13/06
Inventor 姜俊李金钟徐志新
Owner ASIA PAINT SHANGHAI
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