Graphite film composite body and preparation method thereof

A technology of graphite film and composite, which is applied in the field of graphite film polymer composite and its manufacturing, can solve the problems of graphite film composite such as low flexural strength, easy peeling, complicated process, etc., and achieve strong interlayer bonding, The effect of good interlayer bonding force and simple preparation method

Active Publication Date: 2017-01-11
HARBIN INST OF TECH AT WEIHAI
View PDF12 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] When preparing graphite-film polymer composites, the existing methods are relatively complica...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Graphite film composite body and preparation method thereof
  • Graphite film composite body and preparation method thereof
  • Graphite film composite body and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1. S101, stacking, stacking 300 commercial expanded graphite films (the first type of graphite film) with a size of 10cm×10cm and a thickness of 50μm layer by layer to form a graphite film laminate.

[0049] 2. S102, one impregnation, take 200g of n-butanol and 600g of xylene, mix 800g of diluent according to the ratio of 1:3, then add 800g of diluent to 800g of bisphenol F epoxy resin, stir well, and then add 200g of polyamide resin is used as a curing agent, and stirred evenly to obtain a liquid polymer binder; the graphite film laminate is placed in a mold, and the mold is placed in a vacuum impregnation furnace, and the vacuum impregnation furnace starts to evacuate until the pressure is 10Pa , the temperature in the impregnation furnace is 25°C, open the fluid valve of the vacuum impregnation furnace, flow the liquid polymer binder into the mold, close the fluid valve, immerse for 3 hours, and the pressure is 10Pa, the liquid polymer binder passes through the graphi...

Embodiment 2

[0056] 1. S101, stacking, stacking 200 commercial pyrolytic graphite films (the second type of graphite film) with a size of 5cm×5cm and a thickness of 40μm layer by layer to make a graphite film laminate.

[0057] 2. S102, one impregnation, take 200g of n-butanol and 600g of xylene, mix 800g of diluent according to the ratio of 1:3, then add 800g of diluent to 800g of bisphenol F epoxy resin, stir well, and then add 200g of polyamide resin is used as a curing agent, and stirred evenly to obtain a liquid polymer binder, the graphite film laminate is placed in a mold, the mold is placed in a vacuum impregnation furnace, and the vacuum impregnation furnace starts to evacuate until the pressure is 10Pa , the temperature in the impregnation furnace is 25°C, open the fluid valve of the vacuum impregnation furnace, flow the liquid polymer binder into the mold, close the fluid valve, impregnate for 1.5h, and the pressure is 10Pa, the liquid polymer binder passes through the graphite f...

Embodiment 3

[0064]1. S101, stacking, stacking 100 self-made graphite films with a size of 5cm×5cm and a thickness of 20μm layer by layer to make a graphite film laminate. The graphite film used is the third type of graphite film, which is prepared from graphene oxide. For the specific method, please refer to UltrathinFlexible Graphene Film: An Excellent Thermal Conducting Material with Efficient EMI Shielding (Advanced Functional Materials, 24(2014), 4542–4548). The specific steps are as follows: 1) Take 5g of graphene oxide and dissolve it in 5000mL deionized water, and stir it ultrasonically for 1h; 2) Then pour it into a polytetrafluoroethylene watch glass, dry it at 50°C for 10h, remove the water, and get graphite oxide at the bottom of the watch glass Graphene oxide film, because the graphene oxide film is poorly bonded to the bottom PTFE, so the graphene oxide film can be peeled off to obtain an independent graphene oxide film; 3) Subsequently, the graphene oxide film is placed in gr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thermal conductivityaaaaaaaaaa
Thicknessaaaaaaaaaa
Widthaaaaaaaaaa
Login to view more

Abstract

The present invention provides a preparation method of a graphite film composite body. According to the preparation method, a polymer binder is infiltrated into a plurality of layers of graphite films by means of dipping and punching processes, so that the graphite film composite body can be formed. The method has the advantages of simplicity, reliability and high operability, and can be applied to the preparation of graphite film polymer composite bodies. The graphite film composite body prepared by using the method has the advantages of small density, adjustable thickness, high thermal conductivity, good mechanical properties, strong interlayer bonding strength and the like, and can be widely applied to the thermal management of electronic products.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a graphite film polymer composite and a manufacturing method thereof. Background technique [0002] With the rapid development of electronic technology, the volume of electronic components is shrinking, the integration of chips is increasing, and the heat flux is also increasing. High-power electronic components will generate a lot of heat. If effective thermal management measures are not taken to transfer the heat away, the components will be damaged or even damaged. Graphite is a good thermal conductivity material with layered structure and anisotropy, and its plane thermal conductivity can reach 50-1800W / (m·K). Moreover, the density of graphite is low, the theoretical density is only ~2.2g / cm 3 , is a thermally conductive material with broad application prospects. The graphite film or graphite sheet developed in recent years can be as thin as tens of microns, and has go...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H05K7/20B32B9/00B32B27/04B32B7/12B32B37/12B32B38/08B32B38/00B32B38/04B32B38/18
CPCB32B7/12B32B9/007B32B27/04B32B37/12B32B38/04B32B38/1808B32B2038/0076B32B2038/047B32B2260/046B32B2307/302B32B2307/54B32B2457/00H05K7/20
Inventor 王华涛姜斌
Owner HARBIN INST OF TECH AT WEIHAI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap