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Composite phase change material based on foamed copper and its preparation method and heat storage package

A composite phase change material and phase change material technology, applied in heat storage packs, composite phase change materials and their preparation fields, can solve problems such as low heat conduction efficiency and easy leakage of liquid, reduce environmental pollution, prolong service life, improve The effect of thermal conductivity

Active Publication Date: 2020-11-10
BEIJING NAT BATTERY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The first purpose of the present invention is to provide a composite phase change material based on copper foam to alleviate the technical problems of low heat conduction efficiency and easy liquid leakage after the metal foam and phase change material are combined in the prior art

Method used

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preparation example Construction

[0039] In one embodiment of the present invention, the preparation method of the above-mentioned composite phase change material includes: heating and melting the phase change material and placing it in a vacuum impregnation machine, and the volume of the phase change material placed in the vacuum impregnation machine is 40% to 70% of the volume, and make the temperature of the vacuum impregnation machine 6-8°C higher than the phase change temperature of the phase change material, so that the phase change material remains liquid; place the foamed copper metal in a vacuum chamber with a liquid phase change material inside Vacuum impregnation is carried out in the impregnating machine, and after the foamed copper metal absorbs the full phase change material, it is taken out, cooled and solidified to obtain the foamed copper metal layer containing the phase change material; then the foamed copper metal layer containing the phase change material is placed in the chemical vapor depos...

Embodiment 1

[0043] This embodiment is a composite phase change material with copper foam as the matrix, including copper foam metal layers and graphene layers alternately arranged in a layered structure, the copper foam metal layer contains paraffin, and the composite phase change material The outermost layer is a graphene layer, that is, both sides of the composite phase change material are provided with graphene layers. Among them, there are 3 layers of copper foam metal layers, and 4 layers of graphene layers. The thickness of each layer of foamed copper metal layer is 0.3cm. The thickness of each graphene layer is 0.1 cm. The weight percentage of the phase change material in the foamed copper metal layer is 82%.

[0044] The preparation method of the composite phase change material comprises: heating and melting the paraffin wax of the phase change material and placing it in a vacuum impregnation machine, and the volume of the paraffin wax of the phase change material in the vacuum im...

Embodiment 2

[0046] This embodiment is a composite phase change material with copper foam as the matrix, including foamed copper metal layers and graphene layers alternately arranged in a layered structure, the foamed copper metal layer contains stearic acid, and the composite phase change The outermost layer of the material is a graphene layer, that is, both sides of the composite phase change material are provided with graphene layers. Among them, the copper foam metal layer is 4 layers, and the graphene layer is 5 layers. The thickness of each layer of foamed copper metal layer is 0.6cm. The thickness of each graphene layer is 0.2 cm. The weight percentage of the phase change material in the foamed copper metal layer is 84%.

[0047] The preparation method of the composite phase change material comprises: heating and melting the phase change material stearic acid and placing it in a vacuum impregnation machine, and the volume of the phase change material placed in the vacuum impregnat...

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Abstract

The invention provides a composite phase change material with foamy copper as a base body and a preparing method thereof and a heat storage bag, and relates to the field of phase change materials. Thecomposite phase change material with the foamy copper as the base body comprises a foamy copper metal layer and a graphene layer which are alternatively arranged in a stratified structure, and the foamy copper metal layer comprises the phase change material. Through the composite phase change material, the technical problems that in the prior art, after foam metal and the phase change material are compounded, the heat conduction efficiency is low, and liquid is easily leaked can be solved, and the aims of improving the heat conduction efficiency and reducing leakage are achieved.

Description

technical field [0001] The invention relates to the technical field of phase change materials, in particular to a composite phase change material with copper foam as a matrix, a preparation method thereof and a heat storage pack. Background technique [0002] Phase change materials are a general term for substances that use the massive endothermic and exothermic effects of materials during the phase change process for energy storage and temperature regulation. Phase change materials are widely used in building energy saving, road traffic, modern agricultural greenhouses, solar energy utilization, food refrigeration and transportation, medical care, electronic equipment heat dissipation, athletes cooling and warm clothing, special temperature control clothing, aerospace technology, military infrared camouflage, power transfer There are broad application prospects in many fields such as peak filling and valley filling, industrial waste heat storage and utilization, and heat en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06F28D20/00
CPCC09K5/063F28D20/0056Y02E60/14Y02P20/10
Inventor 于强罗洪旭孙高峰李卓杨广敏
Owner BEIJING NAT BATTERY TECH
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