Polydopamine modified tungsten-doped vanadium dioxide nanoparticle composite intelligent temperature control coating and preparation method thereof

A vanadium dioxide and nanoparticle technology, applied in vanadium oxide, coating and other directions, can solve the problems of complex preparation process and low modification efficiency, and achieve the effects of uniform particle size, mild reaction, and easy control of reaction.

Pending Publication Date: 2021-02-09
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of polydopamine-modified tungsten-doped vanadium dioxide nanoparticle composite intelligent temperature-control coating, which solves the problems of complicated preparation process and low modification efficiency in the existing preparation technology

Method used

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  • Polydopamine modified tungsten-doped vanadium dioxide nanoparticle composite intelligent temperature control coating and preparation method thereof
  • Polydopamine modified tungsten-doped vanadium dioxide nanoparticle composite intelligent temperature control coating and preparation method thereof
  • Polydopamine modified tungsten-doped vanadium dioxide nanoparticle composite intelligent temperature control coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Step 1. Dissolve the weighed vanadyl sulfate in water, add oxalic acid, and stir at 40°C for 20 minutes to obtain a vanadyl sulfate solution reduced by oxalic acid;

[0051] Step 2. Dissolve the weighed tungstic acid in hydrogen peroxide solution, and sonicate at 30°C for 10 minutes to obtain a tungstic acid solution;

[0052] Step 3. Add the tungstic acid solution obtained in step 2 into the vanadyl sulfate solution obtained in step 1, and stir at 40°C for 0.5h to obtain a mixed solution;

[0053] Step 4. Transfer the mixed solution obtained in step 3 to a reaction kettle, and conduct a hydrothermal reaction at 180° C. for 5 hours to obtain a hydrothermal product;

[0054] Step 5. Cross-wash the hydrothermal product obtained in step 4 with water and ethanol, and dry it in an oven at 60°C for 6 hours to obtain a dried product;

[0055] Step 6, performing high-temperature annealing on the dried product obtained in step 5 at 450° C. for 1 hour to obtain tungsten-doped va...

Embodiment 2

[0059] Step 1. Dissolve the weighed vanadium pentoxide in water, add acetic acid, and stir at 50° C. for 30 minutes to obtain a vanadium pentoxide solution reduced by acetic acid;

[0060] Step 2. Dissolve the weighed sodium tungstate in the hydrogen peroxide solution, and sonicate at 40°C for 20 minutes to obtain the sodium tungstate solution;

[0061] Step 3. Add the sodium tungstate solution obtained in step 2 to the vanadium pentoxide solution obtained in step 1, and stir at 50°C for 1 hour to obtain a mixed solution;

[0062] Step 4. Transfer the mixed solution obtained in step 3 to a reaction kettle, and conduct a hydrothermal reaction at 200° C. for 6 hours to obtain a hydrothermal product;

[0063] Step 5. Cross-wash the hydrothermal product obtained in step 4 with water and ethanol, and dry it in an oven at 70°C for 8 hours to obtain a dried product;

[0064] Step 6. Perform high-temperature annealing on the dried product obtained in step 5 at 550° C. for 2 hours to ...

Embodiment 3

[0068] Step 1. Dissolving the weighed vanadyl acetylacetonate in water, adding phthalic acid, and stirring at 60° C. for 40 minutes to obtain a solution of vanadyl acetylacetonate reduced by phthalic acid;

[0069] Step 2. Dissolve the weighed ammonium tungstate in hydrogen peroxide solution, and sonicate at 50°C for 30 minutes to obtain ammonium tungstate solution;

[0070] Step 3. Add the ammonium tungstate solution obtained in step 2 to the vanadyl acetylacetonate solution obtained in step 1, and stir at 60°C for 1.5 hours to obtain a mixed solution;

[0071] Step 4. Transfer the mixed solution obtained in step 3 to a reaction kettle, and conduct a hydrothermal reaction at 220° C. for 7 hours to obtain a hydrothermal product;

[0072] Step 5. Cross-wash the hydrothermal product obtained in step 4 with water and ethanol, and dry it in an oven at 80°C for 10 hours to obtain a dried product;

[0073] Step 6. Perform high-temperature annealing on the dried product obtained in ...

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Abstract

A preparation method of a polydopamine modified tungsten-doped vanadium dioxide nanoparticle composite intelligent temperature control coating comprises the following steps: mixing a vanadium source solution containing a reducing agent with a tungsten source solution containing hydrogen peroxide, carrying out a hydrothermal reaction, drying the product, and carrying out high-temperature annealingtreatment to obtain tungsten-doped vanadium dioxide; and dispersing tungsten-doped vanadium dioxide in water, adding a buffer solution to adjust the pH value to 7.5-9.5, adding dopamine hydrochloridewith different mass ratios, and stirring to react, thereby obtaining the polydopamine-modified tungsten-doped vanadium dioxide nanoparticles. According to the preparation method disclosed by the invention, the polydopamine modified tungsten-doped vanadium dioxide nanoparticle composite intelligent temperature control coating which is high in purity, uniform in particle size distribution, high in photo-thermal conversion efficiency, good in biocompatibility, good in dispersity and strong in adhesion can be obtained.

Description

technical field [0001] The invention belongs to the technical field of functional materials and nanometer materials, and in particular relates to a preparation method of a polydopamine-modified tungsten-doped vanadium dioxide nanoparticle composite intelligent temperature-control coating. Background technique [0002] Vanadium dioxide is a thermochromic material with semiconductor-metal phase transition characteristics, and the phase transition temperature of pure vanadium dioxide is 68°C. The change of the structure before and after the phase change leads to a reversible change from transmission to reflection for infrared and near infrared, which makes it have good thermochromic performance and excellent photothermal conversion performance. It has wide application value in the fields of intelligent coating, optical storage device and infrared radiation detection. [0003] The preparation methods of vanadium dioxide mainly include thermal decomposition method, sol-gel metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/62C01G31/02
CPCC09D7/62C01G31/02
Inventor 周建华刘庚刘晨
Owner SHAANXI UNIV OF SCI & TECH
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