Graphene-based high-thermal-conductivity phase change material as well as 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., can solve problems affecting the thermal conductivity of graphene phase change materials, and achieve improved thermal conductivity, The effect of improving the degree of wetting and good bonding

Active Publication Date: 2022-01-07
GUANGDONG MORION NANOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Graphene-based high-thermal-conductivity phase change material as well as preparation method and production device thereof
  • Graphene-based high-thermal-conductivity phase change material as well as preparation method and production device thereof
  • Graphene-based high-thermal-conductivity phase change material as well as preparation method and production device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation method of the graphene-based high thermal conductivity phase change material of the present embodiment comprises the following steps: (1) making the density 0.3g / cm 3 , thickness 5mm, pore diameter 0.001-300μm graphene foam, after the surface is pasted with a shielding film, put it into the vacuum temperature change box 1, vacuum, the vacuum degree is 90kPa, and the temperature is raised to 65°C; (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 insert the injection port of the syringe 2 into the graphene foam, The depth is 2.5mm, slowly inject liquid paraffin phase change material, stop injecting phase change material immediately after the liquid overflows from the puncture port, then quickly cool down the vacuum temperature change box 1 to 20°C, and keep it warm for 30 minutes, so that the paraffin become...

Embodiment 2

[0038] The preparation method of the graphene-based high thermal conductivity phase change material of the present embodiment comprises the following steps: (1) making the density 0.3g / cm 3 , thickness 5mm, pore diameter 0.001-300μm graphene foam, after the surface is pasted with a shielding film, put it into the vacuum temperature change box 1, vacuumize, the vacuum degree is 133Pa, and the temperature is raised to 65 °C; (2) 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 insert the injection port of the syringe 2 into the graphene foam, Slowly inject the liquid paraffin phase change material at a depth of 2.5 mm, stop injecting the phase change material immediately when liquid overflows from the injection port, then quickly cool down the vacuum temperature change box 1 to 20°C, and keep it warm for 30 minutes, so that the paraffin p...

Embodiment 3

[0040] The preparation method of the graphene-based high thermal conductivity phase change material of the present embodiment comprises the following steps: (1) making the density 0.18g / cm 3, thickness 1mm, pore diameter 0.001-300μm graphene foam, after the surface is pasted with a shielding film, put it into the vacuum temperature change box 1, vacuumize, 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 the solid phase change materials become liquid phase change materials; (3) Slowly insert the injection port of the syringe 2 into the graphene foam, Slowly inject the liquid paraffin phase change material at a depth of 0.5mm, stop injecting the phase change material immediately when liquid overflows from the injection port, then quickly cool down the vacuum temperature change box 1 to 15°C, and keep it warm for 30 minutes, so that the paraffin...

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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 comprises the following steps of: 1, putting graphene foam in a vacuum environment, and exhausting internal air; (2) heating and melting a phase change material at a temperature higher than the phase change temperature of the phase change material to obtain a liquid phase change material; and (3) injecting the liquid phase change material into the graphene foam, and after the graphene foam is filled with the liquid phase change material, cooling to solidify the liquid phase change material, thereby obtaining the graphene-based high-thermal-conductivity phase change material. The liquid phase change material fills the graphene foam in an injection manner, so that the situation that the exposed phase change material is molten into liquid and flows to a using device in the using process due to the fact that the phase change material is exposed on the surface of the foam is avoided, and after the surface of the graphene base is exposed, the heat-conducting property of the graphene-based phase change material and the stability of the product quality are improved.

Description

technical field [0001] The invention relates to the technical field of phase change materials, in particular to a graphene-based phase change material with high thermal conductivity, a preparation method and a production device thereof. Background technique [0002] Phase change energy storage materials use latent heat to store heat. They 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, devices with high power consumption have higher and higher requirements for heat dissipation. Traditional phase change materials have low thermal conductivity, such as paraffin wax, which is only 0.3W / mK, and there are problems such as 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...

Claims

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Application Information

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Patent Type & Authority Applications(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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