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Nano-metal composite phase change material and preparation method thereof

A composite phase-change material and nano-metal technology, which is applied in the field of nano-metal composite phase-change materials and its preparation, can solve the problems of uneven heat dissipation, poor heat dissipation performance, and high safety level requirements, and achieve the improvement of excessive contact thermal resistance and enhanced Energy transfer efficiency, effect of preventing sedimentation and agglomeration

Inactive Publication Date: 2021-07-16
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, air medium thermal management has disadvantages such as poor heat dissipation performance, uneven heat dissipation, and poor working reliability.
Liquid medium heat management has disadvantages such as complex heat dissipation system structure, high safety level requirements, high cost, and the need for external energy consumption assistance.
However, the thermal management of traditional phase change materials has disadvantages such as low thermal conductivity and easy leakage.

Method used

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  • Nano-metal composite phase change material and preparation method thereof
  • Nano-metal composite phase change material and preparation method thereof
  • Nano-metal composite phase change material and preparation method thereof

Examples

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Embodiment

[0035] The embodiment of the present application provides a preparation method of a nano-metal composite phase change material:

[0036] (1) Mix expanded graphite and nano-aluminum powder (with a particle size of 40nm) at a mass ratio of 25:1, perform ball milling, and then anneal to obtain a thermally conductive enhanced material, wherein ethanol is used as the ball milling medium for ball milling For the wet milling treatment, two or more balls with different particle sizes were selected for high-speed ball milling for 50 hours, and the mass ratio of balls to thermal conductivity enhancing materials was 50:1;

[0037] (2) The carbon nanotubes are pre-dispersed under ultrasonic treatment, placed in a nitric acid solution with a pH value of 1 for acidification treatment, uniformly stirred and then dried to obtain the modified carbon nanotubes. Ultrasonic dispersion of modified carbon nanotubes, mixed with E44 epoxy resin (epoxy value 0.4-0.5) in a weak acid environment at a ma...

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Abstract

The invention belongs to the technical field of phase change materials. The invention provides a nano-metal composite phase change material and a preparation method thereof. The preparation method comprises the steps of S1, in a weak acid environment, mixing expanded graphite and nano-metal, conducting ball milling and annealing treatment in sequence, and acquiring a heat conduction enhanced material, S2, pre-dispersing a carbon material to obtain a shaped material, and S3, dispersing the heat conduction enhanced material and the shaped material in liquid paraffin, performing heating reaction, performing high-temperature curing, and performing cooling to obtain the nano-metal composite phase change material. The nano-metal is uniformly adsorbed in a heat-conducting network of the expanded graphite, so that the problem of sedimentation and agglomeration of the nano-metal can be prevented, and the latent heat value of the composite phase change material is greatly improved; the carbon material is adopted as a shaped material to be mixed with the heat conduction enhanced material, a closed three-dimensional network structure can be formed and firmly covers the composite phase change material, crack diffusion and fracture in the composite phase change material are effectively avoided, and the leakage problem is prevented.

Description

technical field [0001] The application belongs to the technical field of phase-change materials, and in particular relates to a nano-metal composite phase-change material and a preparation method thereof. Background technique [0002] With the continuous development of modern society, the use of cars is becoming more and more popular. However, traditional fuel vehicles can no longer meet the requirements of modern social development. The exhaust gas produced by fuel vehicles has caused irreversible damage to the ecological environment. At the same time, fuel vehicles are also consuming a large amount of non-renewable resources. The shortage of energy resources has restricted the development of fuel vehicles and forced the automotive industry to develop in a cleaner and more environmentally friendly direction. . In recent years, new energy vehicles driven by power batteries supported by policies are slowly replacing traditional fuel vehicles powered by fuel. However, new e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C09K5/14B82Y30/00B82Y40/00H01M10/613H01M10/625H01M10/653H01M10/659
CPCB82Y30/00B82Y40/00C09K5/063C09K5/14H01M10/613H01M10/625H01M10/653H01M10/659Y02E60/10
Inventor 杨淇钧王长宏胡锦鹏吴婷婷佘增伟刘钰雯熊子琪
Owner GUANGDONG UNIV OF TECH
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