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
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[0034] Example 1:
[0035] In this embodiment, the energy-saving three-dimensional graphene skeleton composite phase change material with heat storage and exothermic properties is obtained by self-assembly of graphene and organic phase change material PEG2000, wherein the mass of organic phase change material PEG6000 is 9.5g, graphite The mass of alkene was 0.5 g.
[0036] In the present embodiment, the energy-saving three-dimensional graphene skeleton composite phase change material with heat storage and heat release properties is prepared by the following method:
[0037] Place 1.2g graphite in 60mL 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 400 mL of deionized water, and sequentially filter, wash and vacuum dry at 60 °C to obtain pretreated graphite-graphite oxide;
[0038] To 100 mg of graphite oxide, add 50 mL of 98% ...
Example Embodiment
[0042] Example 2:
[0043] The preparation method of this example is the same as that of Example 1, the difference is that the addition amount of the organic phase change material PEG6000 is 3g and 1.5g 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 For the XRD patterns of the three-dimensional graphene skeleton composite phase change materials with different PEG6000 mass percentages obtained in Example 1 and Example 2, and the XRD patterns of pure PEG6000 and graphene, it can be seen from the XRD patterns of graphene The diffraction peak at 20.9° is a characteristic peak of the layered structure, so compared with the XRD patterns of pure PEG6000 and graphene, it can be seen that graphene does not have this characteristic peak in the phase change ma...
Example Embodiment
[0048] Example 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 example, 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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