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A graphene oxide/silver particle composite reinforced paraffin type phase-change energy storage material and a preparing method thereof

A technology for phase change materials and composite materials, which is applied in the field of solid-liquid composite phase change material preparation, can solve problems such as property limitations, and achieve the effects of improving affinity, enhancing thermal conductivity, and changing phase transition temperature.

Inactive Publication Date: 2018-12-18
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although graphene has been demonstrated to have ultrahigh thermal conductivity and can greatly improve the thermal conductivity of nanocomposites, their properties are limited by the high interfacial thermal resistance at the interface with the contacting substrate.

Method used

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  • A graphene oxide/silver particle composite reinforced paraffin type phase-change energy storage material and a preparing method thereof
  • A graphene oxide/silver particle composite reinforced paraffin type phase-change energy storage material and a preparing method thereof
  • A graphene oxide/silver particle composite reinforced paraffin type phase-change energy storage material and a preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) In order to make graphene oxide better dispersed in paraffin matrix material, graphene oxide was modified by coupling agent. 5g of silane coupling agent KH-570 and 60g of acetone were mixed and stirred at 30°C for 20min; 10g of graphene oxide prepared by the improved Hummers method was vacuum-dried and added to the above mixture, stirred and ground for 20min; heated under vacuum The above-mentioned mixed solution was reacted at 70° C. for 3 hours to obtain a modified graphene oxide solution; 80 g of paraffin was chopped and added to the above-mentioned modified graphene oxide solution, and 100 g of acetone was added and mixed and stirred at 30° C. for 20 minutes; Heat the water bath of the above solution to 65°C, and ultrasonically disperse at 30°C for 20 minutes; put the above-mentioned ultrasonically dispersed mixture into a vacuum mixer, adjust the vacuum suction rate to 0.4L / s and heat to 60°C, and stir slowly And vacuum degassing for 5h to obtain the prepared g...

Embodiment 2

[0040] Example 2: The other conditions are the same as in Example 1, and the thermal properties of the materials produced by adding different amounts of silane coupling agent KH-570 are tested. The experimental results are shown in Table 1.

[0041] Table 1 Thermal properties of materials produced by adding different silane coupling agent KH-570

[0042]

[0043]From the above results, it can be seen that the addition amount of the silane coupling agent KH-570 is preferably 5 g (Example 1).

Embodiment 3

[0044] Example 3: Other conditions are the same as in Example 1, and the thermal properties of the materials produced by different graphene oxide additions are checked. The experimental results are shown in Table 2.

[0045] Table 2 Thermal properties of materials produced by different amounts of graphene oxide added

[0046]

[0047] From the above results, it can be seen that the added amount of graphene oxide is preferably 10 g (embodiment 1).

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Abstract

A graphene oxide / silver particle composite reinforced paraffin type phase-change energy storage material and a preparing method thereof are disclosed. In the method, silver particles and graphene, adopted as filling materials, are added into a paraffin matrix to enhance inner heat conductivity of the matrix material; a coupling agent is adopted to modify graphene oxide to improve dispersibility ofthe graphene oxide in the matrix material; and a vacuum stirring drying method is adopted to uniformly disperse the graphene and nanometer silver particles into the matrix material, thus overcoming aggregation and settlement in common mixing. The composite thermal interface material prepared by the method can be widely applied in the energy industry, the electronic industry, the aerospace technique, and other related fields.

Description

technical field [0001] The invention relates to a graphene oxide / silver particle composite strengthened paraffin-type phase change energy storage material and a preparation method thereof, belonging to the field of preparation of solid-liquid composite phase change materials. Background technique [0002] Due to the advantages of high latent heat and constant phase transition temperature during the phase transition process, solid-liquid phase change materials can well realize energy storage and utilization, and have been widely used in electronic heat dissipation, building energy saving, and solar energy utilization. As a commonly used organic phase change material, paraffin wax is mainly composed of linear alkanes, which has the advantages of thermochemical stability, low corrosion, and low cost. However, the low thermal conductivity largely limits its application in the field of thermal energy storage. In order to improve the thermal conductivity of paraffin, researchers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 张平袁朋魏显猛冼耀琪姜雄杨道国
Owner GUILIN UNIV OF ELECTRONIC TECH
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