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Composite phase change material with aluminum foam as matrix and its preparation method and thermal storage package

A composite phase change material and phase change material technology, which is applied in the field of heat storage packs, composite phase change materials and their preparation, can solve problems such as easy leakage and low heat conduction efficiency, so as to prolong service life, reduce environmental pollution, reduce The effect of heat transfer distance

Active Publication Date: 2021-03-02
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 aluminum 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 the temperature of the vacuum impregnation machine is 6-8°C higher than the phase change temperature of the phase change material, so that the phase change material remains liquid; the aluminum foam is placed in a vacuum chamber containing a liquid phase change material Vacuum impregnation is carried out in the impregnating machine, after the foamed aluminum metal absorbs the full phase change material, it is taken out, cooled and solidified to obtain the foamed aluminum metal layer containing the phase change material; then the foamed aluminum metal layer containing the phase change material is placed in the chemical vapor depositi...

Embodiment 1

[0043] This embodiment is a composite phase change material based on foamed aluminum, including foamed aluminum metal layers and graphene layers alternately arranged in a layered structure, the foamed aluminum 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, the aluminum foam metal layer is 3 layers, and the graphene layer is 4 layers. The thickness of each layer of foamed aluminum metal layer is 0.3cm. The thickness of each graphene metal layer is 0.1 cm. The weight percentage of the phase change material in the aluminum foam metal layer is 86%.

[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...

Embodiment 2

[0046] This embodiment is a composite phase change material with aluminum foam as the matrix, including foamed aluminum metal layers and graphene layers alternately arranged in a layered structure, the foamed aluminum 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 aluminum foam metal layer is 4 layers, and the graphene layer is 5 layers. The thickness of each layer of foamed aluminum metal layer is 0.6cm. The thickness of each graphene metal layer is 0.2 cm. The weight percentage of the phase change material in the aluminum foam metal layer is 88%.

[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 ...

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Abstract

The invention provides a composite phase change material adopting foamed aluminum as a matrix, a preparation method of the composite phase change material and a heat storage bag, and relates to the field of phase change materials. The composite phase change material adopting foamed aluminum as the matrix comprises a foamed aluminum metal layer and a graphene layer which are alternately arranged ina layered structure, wherein the foamed aluminum metal layer contains the phase change material. According to the composite phase change material, the technical problems of low heat conduction efficiency and easy leakage after foamed metal and the phase change material are compounded in the prior art are solved, and the purposes of improving 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 aluminum 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/04C09K5/06F28D20/00
CPCC09K5/063F28D20/0056Y02E60/14Y02P20/10
Inventor 于强罗洪旭孙高峰李卓杨广敏
Owner BEIJING NAT BATTERY TECH