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Energy-saving type three dimensional graphene skeleton composite phase change material with heat storage and release performances, and preparation method thereof

A composite phase change material, graphene skeleton technology, applied in the direction of heat exchange materials, chemical instruments and methods, can solve the problems of easy aging, easy leakage, low thermal conductivity, etc., to achieve good plasticity, prevent leakage, improve thermal conductivity, etc. guiding effect

Active Publication Date: 2015-12-02
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its own shortcomings such as easy leakage, high packaging requirements, and easy aging limit its application in the field of heat dissipation of electronic devices.
On the other hand, low thermal conductivity is another technical bottleneck that limits the large-scale application of organic phase change heat storage materials.
Therefore, combining the advantages of the two phase changes, people have developed shape-fixed phase-change materials, which have improved the performance of phase-change heat storage materials to a certain extent, but traditional shape-fixed phase-change materials still have problems in packaging and other aspects in practical applications. The shortcomings of the above two systems cannot be fundamentally changed

Method used

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  • Energy-saving type three dimensional graphene skeleton composite phase change material with heat storage and release performances, and preparation method thereof
  • Energy-saving type three dimensional graphene skeleton composite phase change material with heat storage and release performances, and preparation method thereof
  • Energy-saving type three dimensional graphene skeleton composite phase change material with heat storage and release performances, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The energy-saving three-dimensional graphene skeleton composite phase change material with heat storage and heat release performance in this embodiment is obtained by self-assembly of graphene and organic phase change material PEG2000, wherein the quality of organic phase change material PEG6000 is 9.5g, graphite The mass of alkenes is 0.5g.

[0036] In this embodiment, the energy-saving three-dimensional graphene skeleton composite phase change material with heat storage and heat release performance is prepared according to the following method:

[0037] Put 1.2g of graphite in 60mL of concentrated sulfuric acid with a mass concentration of 98%, 2gK 2 S 2 o 8 and 2gP 2 o 5 In the mixed solution, react at 85°C for 4.5 hours. After the reaction, dilute the reaction solution with 400mL deionized water, filter, wash and vacuum dry at 60°C in sequence to obtain pretreated graphite-graphite oxide;

[0038] In the graphite oxide of 100mg, add the concentrated sulfuric acid...

Embodiment 2

[0043] The preparation method of this example is the same as that of Example 1, except that the addition amount of the organic phase change material PEG6000 is 3 g and 1.5 g respectively.

[0044] After testing, when PEG6000 is used as the organic phase change material in Examples 1 and 2, the endothermic heat storage temperature of the obtained three-dimensional graphene skeleton composite phase change material is about 62-64°C.

[0045] image 3 It is the XRD spectrum of the three-dimensional graphene skeleton composite phase change material of the different PEG6000 mass percentages of embodiment 1 and embodiment 2, and the XRD spectrum of pure PEG6000 and graphene, can find out from the XRD spectrum of graphene The diffraction peak at 20.9° is the characteristic peak of layered structure, so comparing with the XRD spectra of pure PEG6000 and graphene, it can be seen that graphene does not have this characteristic peak in phase change materials, so it is confirmed that graph...

Embodiment 3

[0049] The preparation method of this example is the same as that of Example 1, except that the organic phase change material is PEG2000, and the addition amounts are 9.5g, 3g and 1.5g respectively.

[0050] After testing, when PEG2000 is used as the organic phase change material in this embodiment, the endothermic heat storage temperature of the obtained three-dimensional graphene skeleton composite phase change material is about 41-46°C.

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Abstract

The invention discloses an energy-saving type three dimensional graphene skeleton composite phase change material with heat storage and release performances, and a preparation method thereof. The phase energy-saving type three dimensional graphene skeleton composite phase change material is obtained through self-assembling graphen in an organic phase change material in a three dimensional skeleton interconnection form, and comprises 5-95 mass% of the organic phase change material, and the balance of graphene. The graphene composite phase change material can effectively solve the leakage problem of the organic phase change material, the three dimensional skeleton network distributed graphene greatly improves the heat conductivity of the phase change material, and provides a rapid transmission channel for heat energy collection and storage and later heat energy use; the preparation method has the advantages of simple operation, low cost and easy popularization; and the heat storage ability and the phase change temperature of the graphene composite phase change material prepared through the method depend on different selected phase change materials to meet different application channels, so wide prospect is provided for future application of the material.

Description

1. Technical field [0001] The invention relates to a nanometer material and a preparation method thereof, in particular to an energy-saving three-dimensional graphene skeleton composite phase change material with heat storage and heat release performance and a preparation method thereof. 2. Background technology [0002] The current energy and environmental crises are increasingly intensified, forcing people to use existing energy as rationally and efficiently as possible while looking for and utilizing renewable energy. That is to say, the rational use of existing non-renewable energy and the development of renewable new energy occupy the same position. Saving the use of existing non-renewable energy is the key to the rational use of existing energy, and it is also the core of people's attention, and the level of energy saving is one of the important symbols to measure the advanced level of a country's science, technology and industry. [0003] Thermal energy is the most w...

Claims

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Application Information

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IPC IPC(8): C09K5/06
Inventor 张忠平张淑东王振洋蒋颖畅
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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