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A kind of high thermal conductivity composite material and its preparation and application

A composite material and high thermal conductivity technology, applied in heat exchange materials, modification through conduction heat transfer, cooling/ventilation/heating transformation, etc., can solve the problems of poor thermal conductivity, large interface thermal resistance, etc., and achieve good heat transfer Orientation alignment, lower interface thermal resistance, and high heat transfer efficiency

Active Publication Date: 2021-09-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the defect of poor thermal conductivity caused by the large interface thermal resistance between the filler and the filler and between the filler and the matrix of the existing thermal conductive material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Mix graphene, liquid metal gallium, and cellulose nanofibers in water according to a mass ratio of 10:10:1, then place the mixed solution in an ultrasonic cell disruptor, and perform ultrasonic treatment on the mixed solution with an ultrasonic power of 450W , the ultrasonic time is 30 minutes; finally, after centrifugation at 2000 rpm for 20 minutes, and vacuum drying at 65°C for 4 hours, the thermally conductive filler is obtained.

[0027] (2) Disperse the thermally conductive filler obtained in step (1) in polypropylene, the mass ratio of the filler to the polypropylene matrix is ​​1:4, and prepare a high thermally conductive composite material.

[0028] (3) After testing, the thermal conductivity of the composite material is 2W / mk, and the tensile strength is 30Mpa.

Embodiment 2

[0030] (1) Mix boron nitride nanosheets, liquid metal gallium indium alloy and cellulose nanofibers in water according to the mass ratio of 6:6:1, then place the mixed solution in an ultrasonic cell disruptor, and ultrasonicate the mixed solution For processing, the ultrasonic power is 650W, and the ultrasonic time is 60 minutes; finally, after centrifugation at 2000 rpm for 20 minutes, and vacuum drying at 65°C for 4 hours, the thermally conductive filler is obtained.

[0031] (2) Disperse the thermally conductive filler obtained in step (1) in polypropylene, the mass ratio of the filler to the polypropylene chloride matrix is ​​1:1, and prepare a high thermally conductive composite material.

[0032] (3) After testing, the thermal conductivity of the composite material is 4W / mk, and the tensile strength is 35Mpa.

Embodiment 3

[0034] (1) Mix aluminum nitride nanosheets, liquid metal gallium indium tin alloy, and cellulose nanofibers in water according to a mass ratio of 2:2:1, then place the mixed solution in an ultrasonic cell disruptor, and process the mixed solution Ultrasonic treatment, the ultrasonic power is 1800W, and the ultrasonic time is 240 minutes; finally, it is centrifuged at 2000 rpm for 20 minutes, and vacuum dried at 65°C for 4 hours to obtain the thermally conductive filler.

[0035] (2) Disperse the thermally conductive filler obtained in step (1) in polypropylene, the mass ratio of the filler to the polypropylene chloride matrix is ​​1:1, and prepare a high thermally conductive composite material.

[0036] (3) After testing, the thermal conductivity of the composite material is 8W / mk, and the tensile strength is 38Mpa.

[0037] The high thermal conductivity composite material of the present invention has good mechanical properties, excellent thermal conductivity and excellent fle...

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Abstract

The invention discloses a high thermal conductivity composite material and its preparation and application, belonging to the field of thermal conductivity composite materials. The invention mixes two-dimensional nanomaterials, liquid metal and cellulose nanofibers in water, then puts the mixed solution in an ultrasonic cell breaker, performs ultrasonic treatment on the mixed solution, and finally centrifuges and dries to obtain the thermally conductive filler. Subsequently, the obtained thermally conductive filler is dispersed in the polymer matrix to prepare a high thermally conductive composite material. The high thermal conductivity composite material of the present invention has good mechanical properties, excellent thermal conductivity and excellent flexibility, and has a wide range of applications in heat dissipation of electronic components, heat dissipation of printed electronics, and heat dissipation of 5G communication equipment.

Description

technical field [0001] The invention relates to the field of thermally conductive composite materials, in particular to a high thermally conductive composite material and its preparation and application. Background technique [0002] With the development of modern electronic components, integration, miniaturization, and functionalization have become the development trend of advanced electronic components in the future. At the same time, this development trend also puts forward higher requirements for the heat dissipation generated by electronic components. The use of thermally conductive composite materials to dissipate heat from electronic components is currently the most commonly used and most effective method for electronic components. Therefore, in order to better adapt to the development trend of electronic components, it is necessary to develop composite materials with higher thermal conductivity. [0003] At present, with the development of nanomaterials, especially...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L1/02C08K3/04C08K3/08C08K7/00C08K3/38C09K5/14H05K7/20
CPCC08K2003/385C08K2201/011C08L23/12C08L2203/20C08L2205/16C09K5/14H05K7/2039C08L1/02C08K3/042C08K3/08C08K7/00C08K3/38
Inventor 祁海松张存智冯晓党超黄中原陶珅名
Owner SOUTH CHINA UNIV OF TECH
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