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Preparation method of heat storage composite material based on nanoparticle electromagnetic wave absorption

A technology of nano-particles and composite materials, applied in the field of heat storage composite materials, can solve problems such as unsatisfactory heating speed and uniformity, inability to directly absorb solar energy, and sacrifice matrix heat storage materials to achieve low cost and uniform heating Good performance and high heat storage efficiency

Inactive Publication Date: 2014-07-16
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Effectively improving the thermal conductivity of heat storage materials requires a large number of additives, which often sacrifices the excellent performance of the base heat storage material, and also greatly increases the cost
At the same time, the current heat storage materials based on the thermal conduction heating mechanism generally cannot directly absorb solar energy and convert it into heat energy, but first convert solar energy into heat energy, and then charge the heat storage material through heat conduction, resulting in the final light The heat conversion efficiency is low, and the heating speed and uniformity are not ideal

Method used

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  • Preparation method of heat storage composite material based on nanoparticle electromagnetic wave absorption
  • Preparation method of heat storage composite material based on nanoparticle electromagnetic wave absorption
  • Preparation method of heat storage composite material based on nanoparticle electromagnetic wave absorption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of gold nanoparticles

[0025] According to the recipe requirements, HAuCl 4 Dissolve in toluene by ultrasonic, add part of oleylamine, heat and stir, then pass through nitrogen atmosphere and cold water to reflux, after the reaction is complete, add methanol n-hexane mixed solution to the mixed solution and centrifuge at a high speed, remove the supernatant, and the obtained The nanoparticles are redispersed in toluene, the size of the nanoparticles is about 8±1nm, and the transmission electron microscope pictures are as follows: figure 1 shown.

[0026] (2) Preparation of nanocomposite heat storage materials

[0027] (3) Heat and melt the transparent paraffin heat storage material, add a certain amount of gold solution with stirring, and continue heating for a period of time to fully volatilize the toluene. After cooling, a nanocomposite heat storage material with evenly distributed gold nanoparticles is obtained.

[0028] (4) Use the light-to-heat...

Embodiment 2

[0033] (1) Preparation of gold nanoparticles

[0034] According to the recipe requirements, HAuCl 4 Dissolve in toluene by ultrasonic, add part of oleylamine, heat and stir, then pass nitrogen atmosphere and cold water to reflux, after the reaction is complete, add methanol n-hexane mixed solution to the mixed solution and centrifuge at a high speed, remove the supernatant, and the obtained The nanoparticles were redispersed in toluene, and the particle size of the nanoparticles was about 10±2nm.

[0035] (2) Surface modification of gold nanoparticles

[0036] Add a certain amount of polydimethylsilane macromolecules with mercapto groups to the gold nanoparticle dispersion solution obtained above, heat and stir, and reflux for 12 hours with nitrogen gas, and add methanol to the reacted solution The modified gold nanoparticles were precipitated and re-dispersed in toluene solvent after high-speed centrifugation.

[0037] (3) Preparation of nanocomposite heat storage material...

Embodiment 3

[0042] The preparation method of heat storage composite materials based on the electromagnetic wave absorption of nanoparticles, uniformly disperses nanoparticles with plasmon resonance absorption characteristics into the heat storage material matrix to prepare nanocomposite heat storage materials, specifically through the surface modification of nanoparticles, in heat storage materials The controllable dispersion in the matrix is ​​prepared by the following steps:

[0043] (1) Surface modification process: uniformly disperse the carbon nanotubes with electromagnetic wave absorption characteristics into the ethanol solvent, then add the above mixed solution into the carboxyl-polyethylene glycol surface modification active agent solution to obtain a precipitate, and use the solvent after centrifugation Rinse and finally redisperse in solvent;

[0044] (2) Dispersion process: Mix the obtained surface-modified carbon nanotube solution with silicone oil, continue heating and stirrin...

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Abstract

The invention relates to a preparation method of a heat storage composite material based on nanoparticle electromagnetic wave absorption. The method comprises the steps of uniformly dispersing nanoparticles with plasma resonance absorption characteristics to a heat storage material matrix through the steps of performing surface modification on the nanoparticles and performing controllable dispersion on the nanoparticles in the heat storage material matrix to prepare a nano composite heat storage material. Compared with the prior art, the method has the characteristics that electromagnetic waves can be directly converted into heat energy, and the heat storage material can be quickly, uniformly and efficiently heated on the premise of unchanging excellent thermophysical property of the heat storage material.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of functional nanocomposite materials, and in particular relates to a method for preparing a heat storage composite material based on nanoparticle electromagnetic wave absorption. Background technique [0002] Thermal energy storage is an important part of energy science and technology. Energy storage technology can solve the contradiction between energy supply and demand in time and space, so it is an effective means to improve energy utilization. Thermal energy storage is widely used in industry and civil use, and occupies an extremely important position in the field of energy storage technology. Solar energy has the characteristics of huge energy, global distribution, and cleanliness. Making full use of solar energy has become a current development hotspot. Thermal storage materials are crucial to the development and efficient use of solar energy as a renewable energy sour...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/12C09K3/00B82Y30/00B82Y40/00
Inventor 邓涛陶鹏尚文王忠勇徐昊
Owner SHANGHAI JIAO TONG UNIV
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