High-thermal conductivity graphite alkenyl polymer heat conducting film and preparation method thereof

A technology of high thermal conductivity graphite and high molecular polymer, applied in the direction of chemical instruments and methods, semiconductor devices, heat exchange materials, etc., can solve the problems of low thermal conductivity, need to improve machinability, high cost, etc., to improve thermal conductivity Performance, reduced operating costs and environmental pollution, enhanced strength and toughness effects

Active Publication Date: 2015-05-06
苏州格瑞丰纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The highly oriented graphite film formed by high-temperature pyrolysis has a thermal conductivity of up to 2000W/m K, but the cost is high and the machinability needs to be improved. Currently, it is only used in high-end electronic products; the graphite film formed by rolling expanded graphite The thermal conductivity is between 500-800W/m·K, and its thermal conductivity is lower tha

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Graphene microsheets (with an average radial size of about 70 μm, a thickness of 0.34 nm to 100 nm, and meeting the aforementioned high-quality thin-layer graphene requirements) and polyamic acid (weight-average molecular weight: 8-100,000) in a mass ratio of 1 : 100% mixed, spread evenly on a clean substrate, then heat-treated at 80-350°C for 2 hours, and finally placed in a carbonization furnace for carbonization at 1400°C for 24 hours, and then moved the carbonized material to the graphitization furnace Graphitization was carried out at 2800°C for 24h, taken out and rolled to obtain an artificial thermally conductive graphite film with a thickness of 15μm and a thermal conductivity of 1950W / m·K.

Embodiment 2

[0023] Graphene microsheets (same as Example 1) and epoxy resin (weight-average molecular weight: 340-2200) were mixed in a mass ratio of 1:100, spread evenly on a clean substrate, and then carried out 80-350 ℃ heat treatment for 2 hours, and finally placed in a carbonization furnace for carbonization at 1400°C for 24 hours, then moved the carbonized material to a graphitization furnace for graphitization at 2800°C for 24 hours, took it out and rolled it, and obtained an artificial heat-conducting graphite film. It is 20μm, and the thermal conductivity is 500W / m·K.

Embodiment 3

[0025] Graphene microsheets (same as Example 1) are mixed with high-density polyethylene (weight-average molecular weight: 4-300,000) in a mass ratio of 1:100, spread evenly on a clean substrate, and then carry out 80 Heat treatment at -350°C for 2 hours, and finally placed in a carbonization furnace for carbonization at 1400°C for 24 hours, then moved the carbonized material to a graphitization furnace for graphitization at 2800°C for 24 hours, took it out and rolled it, and made an artificial heat-conducting graphite film. Its thickness is 20 μm, and its thermal conductivity is 400 W / m·K.

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Abstract

The invention discloses a high-thermal conductivity graphite alkenyl polymer heat conducting film as well as a preparation method and usage thereof. The preparation method comprises the following steps: uniformly mixing graphite alkenyl micro-flakes with macromolecular polymers in various proportions; then making the mixture into a film and further carbonizing and graphitizing the film to obtain the high-thermal conductivity graphite alkenyl polymer heat conducting film. According to the invention, graphite alkenyl materials are used as reinforcing material and additive material to reduce usage amount of macromolecular polymers and to cut down operation cost and environment pollution. Furthermore, defects of macromolecular polymers arising from the carbonizing process are reduced and graphitizing degrees of the macromolecular polymers are raised to greatly improve quality of the heating conducting carbon film, so as to enable the film to be thinner and higher in heat conducting performance.

Description

technical field [0001] The invention relates to a heat conduction film and a preparation method thereof, in particular to a high heat conduction graphene-based polymer heat conduction film and a preparation method thereof, belonging to the technical field of heat conduction and heat dissipation materials. Background technique [0002] With the rapid development of microelectronics integration technology and high-density printed board assembly technology, the assembly density has increased rapidly, the volume of electronic components and logic circuits has been reduced by thousands of times, and electronic instruments and equipment are becoming lighter, thinner, shorter and smaller. direction of development. Under high-frequency operating frequency, the working thermal environment of semiconductors moves rapidly towards high temperature. At this time, the heat generated by electronic components accumulates and increases rapidly. Under the ambient temperature of use, electroni...

Claims

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Application Information

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IPC IPC(8): C09K5/14H01L23/373
CPCC09K5/14
Inventor 刘立伟陈明亮王汝冰郭玉芬李奇李伟伟邱胜强刘朝军
Owner 苏州格瑞丰纳米科技有限公司
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