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

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
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] Disperse 40wt% of sodium acetate trihydrate in an aqueous solution and stir uniformly, then disperse 60wt% of 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 produce a flexible thermal conductivity / heat storage dual-function composite material (film) with graphene as the matrix. Its structure is like 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.

Example Embodiment

[0029] Example 2

[0030] Such as figure 2 As shown, 20wt% of paraffin is sprayed and granulated to form micro-nano particles in the spray granulation zone 1 at the upper part of the furnace body, and 80wt% of the nano graphite flakes are blown through the airflow in the blowing zone 3 at the lower part of the furnace body. , The two materials meet in the load zone 2 in the middle of the furnace body, the graphite nano flakes loaded with paraffin wax particles will sink due to gravity, and finally a powder of graphite nano flakes loaded with paraffin wax particles is obtained. The powder can be formed into a continuous flexible heat conduction / heat storage dual-function composite material (film) with nano graphite sheet as a matrix by roll forming.

Example Embodiment

[0031] Example 3

[0032] Disperse 33wt% of calcium chloride hexahydrate in an aqueous solution and stir uniformly, then disperse 67wt% of carbon nanotubes in the solution and sonicate for 24 hours to obtain an aqueous solution of carbon nanotubes loaded with calcium chloride hexahydrate particles. The solution is dried and hot-pressed to produce a flexible thermal conductivity / heat storage dual-function 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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