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Novel phase-change material composition

A technology of phase change materials and compositions, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of poor heat transfer or thermal conductivity, difficulty in popularization and application, high cost, etc., and achieve improved thermal performance and high thermal conductivity , improve the effect of heat absorption

Active Publication Date: 2015-06-24
HUZHOU MINGSHUO OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Among these phase change materials, phase change materials with a phase change temperature between 20 and 80°C have good uses in heat absorption and heat storage, but most of them have high cost and poor heat transfer or thermal conductivity, making them There are certain difficulties in the popularization and application in the field of heat dissipation

Method used

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Embodiment 1

[0029] The additive components and their mass ratios used are: the mass ratio of carbon nanotubes, graphene, particles, and fumed silica is 1:10:8:1, and the mass ratio of the additives as a whole to the phase change material is 1:4 .

[0030] The purity of the carbon nanotubes in the above preferred embodiments is ≥95wt%, and the ash content is ≤0.2wt%.

[0031] The particulate matter described in the above-mentioned preferred embodiment is aluminum oxide (Al 2 o 3 ), the average particle size is 10um.

[0032] The phase change material described in the above preferred embodiment is paraffin, and the phase change temperature is 70°C.

[0033] The preparation method of the above-mentioned preferred embodiment: heat the paraffin until it is completely melted, then pour the carbon nanotubes, graphene and particles with a mass ratio of 1:10:8 into the paraffin melt for pre-mixing, and stir until they are evenly mixed , slowly add the required mass of fumed silica, continue st...

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Abstract

The invention discloses a novel phase-change material composition. The novel phase-change material composition mainly comprises carbon nanotubes, graphene, fumed silica, metal or metal oxide particles and a phase-change material. The carbon nanotubes, graphene and metal or metal oxide particles can further accelerate heat transmission. The phase-change material is used for improving a hot end initial temperature absorption rate. The fumed silica has effects of precipitation prevention and thickening and can prevent graphene and particle aggregation settlement after heat absorption liquefaction of the phase-change material. The carbon nanotubes, graphene and metal or metal oxides can finally form a full 3D network comprising particles (metal or metal oxides), wires (carbon nanotubes) and planes (graphene) in the fluid (of phase-change material subjected to heat absorption melting). The novel phase-change material composition has high heat conductivity and low thermal resistance value, has high specific heat capacity, greatly improves phase-change material heat absorption, heat storage and heat radiation efficiency and has a high practical value.

Description

technical field [0001] The invention belongs to the field of phase change materials, and particularly provides a novel phase change material composition. Background technique [0002] With the increasing problem of global greenhouse gas emissions and the deterioration of the ecosystem environment, energy conservation and emission reduction has become a global issue. Countries around the world have successively introduced relevant policies and work plans for energy saving and emission reduction, seeking more green, energy-saving and environmentally friendly lighting methods, and low-energy LED light sources have received high attention. LED (Light Emitting Diode) is a semiconductor all-solid-state light-emitting device, which belongs to the injection-type light-emitting device. Its advantages lie in its long life, small size, energy saving, and safety. At present, the power of a single LED device has jumped from the initial milliwatt level to the current tens of watt level. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/06C09K5/063
Inventor 钱新明陈威吕旭
Owner HUZHOU MINGSHUO OPTOELECTRONICS TECH CO LTD
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