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A kind of graphene-based high thermal conductivity phase change material and preparation method and production device thereof

A phase change material, graphene-based technology, applied in heat exchange materials, chemical instruments and methods, sustainable manufacturing/processing, etc. The effect of improving the degree of wetting and good bonding

Active Publication Date: 2022-08-09
GUANGDONG MORION NANOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of infiltration and mixing method will inevitably form a phase change material layer on the surface of graphene, that is, the heat conduction surface of graphene will be covered by phase change material, thereby affecting the thermal conductivity of graphene phase change material.

Method used

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  • A kind of graphene-based high thermal conductivity phase change material and preparation method and production device thereof
  • A kind of graphene-based high thermal conductivity phase change material and preparation method and production device thereof
  • A kind of graphene-based high thermal conductivity phase change material and preparation method and production device thereof

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Experimental program
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Effect test

Embodiment 1

[0035] The preparation method of the graphene-based high thermal conductivity phase change material of the present embodiment includes the following steps: (1) setting the density to 0.3 g / cm 3 , the thickness is 5mm, the pore size is 0.001-300μm graphene foam, after the shielding film is attached to the surface, put it into the vacuum temperature change box 1, vacuumize, the vacuum degree is 90kPa, and the temperature is raised to 65 ℃; (2) The paraffin phase change material (phase change temperature 60 ° C) in the syringe 2, and heated to 65 ° C, until all the solid phase change materials become liquid phase change materials; (3) slowly pierce the injection port of the syringe 2 into the graphene foam, The depth of 2.5mm, slowly inject the liquid paraffin phase change material, stop injecting the phase change material immediately after the liquid overflows from the puncture port, and then quickly cool down the vacuum temperature change box 1 to 20 ℃, and keep the temperature ...

Embodiment 2

[0038] The preparation method of the graphene-based high thermal conductivity phase change material of the present embodiment includes the following steps: (1) adjusting the density to 0.3 g / cm 3 , the thickness is 5mm, the pore size is 0.001-300μm graphene foam, after the shielding film is attached to the surface, put it into the vacuum temperature change box 1, vacuumize, the vacuum degree is 133Pa, and the temperature is raised to 65 ℃; (2) The paraffin phase change material (phase change temperature 60 ° C) in the syringe 2, and heated to 65 ° C, until all the solid phase change materials become liquid phase change materials; (3) slowly pierce the injection port of the syringe 2 into the graphene foam, The depth of 2.5mm, slowly inject the liquid paraffin phase change material, stop injecting the phase change material immediately when the liquid overflows from the injection port, and then quickly cool down the vacuum temperature change box 1 to 20 ° C and keep it warm for 3...

Embodiment 3

[0040] The preparation method of the graphene-based high thermal conductivity phase change material of the present embodiment includes the following steps: (1) setting the density to 0.18g / cm 3, the thickness is 1mm, the pore size is 0.001-300μm graphene foam, after the shielding film is attached to the surface, it is put into the vacuum temperature change box 1, vacuumized, the vacuum degree is 133Pa, and the temperature is raised to 45 °C; (2) The paraffin phase change material (phase change temperature 40 ° C) in the syringe 2, and heated to 45 ° C, until all solid phase change materials are turned into liquid phase change materials; (3) the injection port of the syringe 2 is slowly pierced into the graphene foam, The depth of 0.5mm, slowly inject the liquid paraffin phase change material, stop injecting the phase change material immediately when the liquid overflows from the injection port, then quickly cool down the vacuum temperature change box 1 to 15 ℃, and keep the tem...

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Abstract

The invention relates to the technical field of phase change materials, in particular to a graphene-based high thermal conductivity phase change material and a preparation method and production device thereof. The preparation method includes the following steps: (1) placing graphene foam in a vacuum environment, and discharging it internal air; (2) heating and melting the phase change material at a temperature higher than its phase change temperature to obtain a liquid phase change material; (3) injecting the liquid phase change material into the graphene foam, and filling the liquid phase change material with graphite After the olefin foam is cooled, the liquid phase change material is solidified to obtain the graphene-based high thermal conductivity phase change material. In the present invention, the liquid phase change material is filled into the graphene foam by means of injection, so as to avoid the exposure of the phase change material on the surface of the foam, so that the exposed phase change material melts into a liquid state and flows to the use device during use, and It is beneficial to improve the thermal conductivity of the graphene-based phase change material and the stability of product quality after the surface of the graphene-based is exposed.

Description

technical field [0001] The invention relates to the technical field of phase change materials, in particular to a graphene-based high thermal conductivity phase change material and a preparation method and production device thereof. Background technique [0002] Phase change energy storage materials use latent heat to store heat, and have the characteristics of large enthalpy value, low density, and almost constant temperature during the phase change process. They are widely used in construction, energy, aerospace and other fields. With the advent of the 5G era, the demand for heat dissipation of high-power devices is getting higher and higher, and the thermal conductivity of traditional phase change materials is low, such as paraffin wax, which is only 0.3W / mK, and liquid leakage. This seriously affects the heat transfer efficiency and application scenarios of phase change materials in the process of phase change heat storage or heat release. [0003] Graphene foam is a po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06
CPCC09K5/063Y02P20/10
Inventor 郝振亮蔡金明黄文添
Owner GUANGDONG MORION NANOTECHNOLOGY CO LTD
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