Preparation method of high-thermal-conductivity porous composite material for loading phase-change material

A technology of porous composite materials and phase change materials, which is applied in the field of preparation of high thermal conductivity porous composite materials loaded with phase change materials, which can solve the problems of instability, easy leakage, low thermal conductivity, etc., achieve large loading capacity and improve stability The effect of adjusting life and thermal conductivity

Pending Publication Date: 2022-07-01
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the existing problems of single carrier structure for phase change materials, low loading capacity of effective components, low thermal conductivity, instability and easy leakage, etc., the present invention aims at the deficiencies existing in the prior art, and its main purpose is to provide a carrier for phase change materials Use the preparation method of high thermal conductivity porous composite material, which has high thermal conductivity, high load capacity, and high stability as the carrier of phase change materials, and develop an efficient and simple preparation method to overcome the shortcomings of the existing technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Mix the layered solid powder of clay minerals, graphite and hexagonal boron nitride according to the formula of 0.2:1:1 to form a water / ethanol suspension, peel off into nano-layers by ultrasonic-sanding, and add an appropriate amount of binder to promote nano-layers. The layers are self-assembled and freeze-dried or spray-dried to form a multi-component micro-nano multi-level porous composite material. , alkane and other phase change material components to prepare phase change materials.

Embodiment 2

[0016] The preparation method is the same as that of Example 1, except that the weight ratio of the layered solid powder of clay minerals, graphite and hexagonal boron nitride is 0.2:2:1.

Embodiment 3

[0018] The preparation method is the same as that of Example 1, except that the weight ratio of the layered solid powder of clay minerals, graphite and hexagonal boron nitride is 1:1:2.

[0019] In the above three embodiments, there are three kinds of micro-nano multi-level porous composite materials E prepared in Example 1, which are represented by A1, A2, and A3 respectively. The thermal conductivity is arranged as: A2> A1> A3; the insulation coefficient is arranged as: A3>A1>A2. The beneficial effects of the present invention are reflected in: (1) the loading amount of the effective phase change component is larger; (2) the thermal conductivity is adjustable and can be greatly improved; (3) the stability of the phase change material during use can be greatly improved sex and longevity.

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PUM

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Abstract

The invention discloses a preparation method of a high-thermal-conductivity porous composite material for loading a phase-change material, which comprises the following steps: mixing layered solid powder such as clay mineral, graphite and hexagonal boron nitride in proportion to prepare a water/ethanol suspension, performing ultrasonic-sanding stripping to form nano-lamellas, adding a proper amount of binding agent to promote self-assembly of the nano-lamellas, and preparing the high-thermal-conductivity porous composite material for loading the phase-change material. And carrying out freeze drying or spray drying to form the micro-nano multistage porous composite material composed of a plurality of components. The porous composite material is subjected to surface treatment and then compounded with paraffin, alkane and other phase change material components through mechanochemistry, melting and other processes, and the phase change material is prepared. The invention has the following beneficial effects: (1) the loading capacity of the effective phase change component is larger; (2) the heat conductivity coefficient is adjustable and can be greatly improved; and (3) the stability and the service life of the phase change material in the use process can be greatly improved and prolonged.

Description

technical field [0001] The invention relates to the technology in the field of non-metal porous composite materials, in particular to a preparation method of a high thermal conductivity porous composite material for supporting phase change materials. Background technique [0002] With the rapid development of electric vehicles and 3C electronic products, the use of lithium batteries is increasingly widespread. The charging and discharging characteristics of lithium batteries can be greatly affected by temperature, especially for fast-charging lithium battery devices. If the local temperature is too high, it will bring security risks, and if the temperature is too low, it will affect the charge and discharge capacity and negatively affect the service life of the battery. The use of thermal management technologies such as cooling and heating is a general idea to solve the above problems. Conventional air cooling, water cooling, electric heating and other technologies have pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/06
Inventor 陈德良郝世吉檀付瑞王涛李涛何松刘子坚
Owner DONGGUAN UNIV OF TECH
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