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Flexible heat conduction/heat storage double-function composite material, method for manufacturing same and application of flexible heat conduction/heat storage double-function composite material

A technology of composite materials and phase-change heat storage materials, which is applied in the field of flexible heat conduction/heat storage dual-functional composite materials and their preparation, can solve the problems of inability to absorb or store heat, hinder the application of electronic equipment, and slow response time, etc., to achieve good results Cooling effect, prolonging service life, and reducing hot spot temperature

Active Publication Date: 2016-06-01
XIAOMO THERMAL MANAGEMENT MATERIALS TECH SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this highly thermally conductive material can only transfer heat, not absorb or store it
[0003] Phase change heat storage materials have also been tried to dissipate heat in electronic equipment, but due to their low thermal conductivity (<10W / mK), slow response time, and easy leakage after phase change, it has seriously hindered their use in electronic equipment. application, so far no large-scale application

Method used

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  • Flexible heat conduction/heat storage double-function composite material, method for manufacturing same and application of flexible heat conduction/heat storage double-function composite material
  • Flexible heat conduction/heat storage double-function composite material, method for manufacturing same and application of flexible heat conduction/heat storage double-function composite material
  • Flexible heat conduction/heat storage double-function composite material, method for manufacturing same and application of flexible heat conduction/heat storage double-function composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Disperse 40wt% sodium acetate trihydrate in the aqueous solution and stir evenly, then disperse 60wt% graphene in the solution and sonicate for 24 hours to obtain an aqueous solution of graphene-loaded sodium acetate trihydrate particles. The solution is dried and molded to prepare a flexible heat conduction / heat storage dual-functional composite material (film) with graphene as the matrix. Its structure is as figure 1 As shown, 1 is a three-dimensional network structure formed by a high thermal conductivity material, and 2 is a phase change heat storage material particle.

Embodiment 2

[0030] Such as figure 2 As shown, 20wt% of the paraffin is formed into micro-nano particles in the spray granulation zone 1 on the upper part of the furnace body through the process of spray granulation, and 80wt% of the nano-graphite flakes are blown by the airflow in the blowing zone 3 on the lower part of the furnace body. , the two materials meet in the loading zone 2 in the middle of the furnace body, the nano-graphite sheets loaded with paraffin particles will sink due to gravity, and finally obtain the powder of nano-graphite sheets loaded with paraffin particles. Roll molding of the powder can form a continuous flexible heat conduction / heat storage dual-functional composite material (film) with nano-graphite sheets as the matrix.

Embodiment 3

[0032] Disperse 33wt% calcium chloride hexahydrate in the aqueous solution and stir evenly, then disperse 67wt% carbon nanotubes in the solution and sonicate for 24 hours to obtain an aqueous solution of carbon nanotube-supported calcium chloride hexahydrate particles. The solution is dried and hot-pressed to prepare a flexible heat conduction / heat storage dual-functional composite material (film) with carbon nanotubes as the matrix.

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Abstract

The invention discloses a flexible heat conduction / heat storage double-function composite material. The flexible heat conduction / heat storage double-function composite material is characterized in that (1-40wt% of) phase-change heat storage material particles are uniformly dispersed in matrixes, and the matrixes comprise (60-99wt% of) high-heat-conduction materials and are of three-dimensional stereoscopic network structures. The invention further discloses a method for preparing the flexible heat conduction / heat storage double-function composite material and application of the flexible heat conduction / heat storage double-function composite material. The flexible heat conduction / heat storage double-function composite material, the method and the application have the advantages that the flexible heat conduction / heat storage double-function composite material has a phase-change heat storage function with quick response capacity and is extremely high in heat conductivity (20-200 W / mK), accordingly, heat can be quickly transferred, heat of high-heat-production components such as chips and screens can be effectively conducted / absorbed, the hot-spot temperatures can be lowered, the service life of electronic equipment can be prolonged, the flexible heat-conduction / heat storage double-function composite material is free of leakage and high in flexibility and can be widely applied to electronic equipment such as intelligent mobile phones with strict requirements on structure spaces, and the like.

Description

technical field [0001] The invention belongs to the field of composite materials, in particular to a flexible thermal conduction / heat storage dual-functional composite material and a preparation method thereof. Background technique [0002] With the miniaturization and high integration of electronic equipment, the heat dissipation problem of electronic equipment is becoming more and more serious. According to the research, the life of electronic components is reduced by 50% for every 10°C increase in temperature. Therefore, in order to prevent local heat accumulation from forming hot spots, it is necessary to use high thermal conductivity materials to quickly transfer the heat away from the hot spots. At the same time, in order to adapt to the narrow and complex structure inside electronic equipment, high thermal conductivity materials are required to be ultra-thin and flexible. For example, a large number of flexible high-thermal-conductivity graphite films are used as he...

Claims

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Application Information

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IPC IPC(8): C09K5/06C09K5/14H05K7/20
Inventor 周绍鑫
Owner XIAOMO THERMAL MANAGEMENT MATERIALS TECH SHENZHEN CO LTD
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