Preparation method for three-dimensional graphene/phase change heat conduction composite material

A technology of phase change heat conduction and composite materials, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of low thermal conductivity and easy leakage of phase change energy storage materials, and achieve simple preparation process, low cost, The effect of outstanding practicality

Inactive Publication Date: 2016-03-09
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of a three-dimensional graphene/phase-change heat-conducting composite material in order to overcome the def

Method used

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  • Preparation method for three-dimensional graphene/phase change heat conduction composite material
  • Preparation method for three-dimensional graphene/phase change heat conduction composite material
  • Preparation method for three-dimensional graphene/phase change heat conduction composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Weigh 2 g of graphite oxide, add 500 ml of deionized water, stir for 30 min, and sonicate for 2 h to prepare a 4 mg / ml graphene oxide solution.

[0052] (2) Weigh 2g of cetyl alcohol, heat it at 80°C, cetyl alcohol melts, add 10.4ml of graphene oxide solution and Hcl solution, pH is 3, stir for 5min, stirring speed is 1500r / min, and a stable emulsion is obtained .

[0053] (3) Put the emulsion into a closed glass bottle, add an appropriate amount of hydrazine hydrate (1 mg graphene oxide corresponds to 0.1-0.4 μL), and heat it at 90°C for 2 hours to obtain a three-dimensional graphene / phase transition separated from the water phase Thermally conductive composite material, just take out the block and dry it.

[0054] Soak the three-dimensional graphene / phase-change heat-conducting composite material prepared in this example in ethanol, and heat at 80°C for 5 minutes to remove cetyl alcohol, pour out the ethanol / cetyl alcohol solution, add ethanol again, repeat The ...

Embodiment 2

[0058] (1) Weigh 2 g of graphite oxide, add 500 ml of deionized water, stir for 30 min, and sonicate for 2 h to prepare a 4 mg / ml graphene oxide solution.

[0059] (2) Weigh 2g of cetyl alcohol, heat it at 80°C until the cetyl alcohol melts, add 20ml of graphene oxide solution and Hcl solution, the pH is 3, stir for 2min at a stirring rate of 10000r / min to obtain a stable emulsion.

[0060] (3) Put the emulsion into a closed glass bottle, add an appropriate amount of hydrazine hydrate (1 mg graphene oxide corresponds to 0.1-0.4 μL), and heat it at 90°C for 2 hours to obtain a three-dimensional graphene / phase transition separated from the water phase Thermally conductive composite material, just take out the block and dry it.

Embodiment 3

[0062] Preparation of Graphene Oxide Cetyl Alcohol Microcapsules

[0063] (1) Preparation of graphene oxide solution.

[0064] Weigh 2 g of graphite oxide, add 500 ml of deionized water, stir for 30 min, and sonicate for 2 h to prepare a 4 mg / ml graphene oxide solution.

[0065] (2) Weigh 1g of cetyl alcohol, heat it at 80°C until the cetyl alcohol melts, add 20ml of graphene oxide solution and Hcl solution, the pH is 3, stir for 2min at a stirring rate of 10000r / min, and a stable emulsion is obtained.

[0066] (3) Put the emulsion into a closed glass bottle, add an appropriate amount of hydrazine hydrate (1 mg graphene oxide corresponds to 0.1-0.4 μL), and heat it at 90°C for 2 hours to obtain a three-dimensional graphene / phase transition separated from the water phase Thermally conductive composite material, just take out the block and dry it.

[0067] The DSC test curve of the three-dimensional graphene / phase-change heat-conducting composite material that embodiment 1-3 m...

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Abstract

The present invention relates to a preparation method of a three-dimensional graphene/phase-change heat conduction composite material. The preparation method uses graphene oxide as an emulsifier, and the graphene oxide is mixed with phase-change materials to prepare a graphene oxide/phase-change material emulsion, the graphene oxide/phase-change material emulsion is used as a template, and the template is subjected to a hydrothermal reduction reaction, thereby obtaining the three-dimensional graphene/phase-change heat conduction composite material. Compared with the prior art, the three-dimensional graphene/phase-change heat conduction composite material is simple in preparation method, good in economic efficiency and good in repeatability, can effectively improve the thermal conductivity and thermal stability of phase-change composite materials, can effectively solve a technical problem of easy leakage, is suitable for industrialized production, and has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of phase-change composite materials, and relates to a preparation method of a three-dimensional graphene / phase-change heat-conducting composite material. Background technique [0002] Phase change energy storage materials absorb or release a large amount of heat when the material undergoes a phase change to realize energy storage and utilization, which can effectively solve the contradiction between energy supply and demand in terms of time and space. Therefore, phase change energy storage technology is widely used in the field of thermal management with discontinuity or instability. Phase change energy storage materials can be divided into organic phase change energy storage materials and inorganic phase change energy storage materials according to the composition of materials. Organic phase change energy storage materials have been widely used in phase change materials because of their high latent heat, l...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 张东尚玉
Owner TONGJI UNIV
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