Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of graphite/epoxy resin composite material

A technology of epoxy resin and composite materials, applied in the direction of solid material additive processing, processing and manufacturing, manufacturing tools, etc., can solve the problems of organic matrix damage, limited thermal conductivity of composite materials, and decline in mechanical properties of composite materials, so as to ensure electrical conductivity Thermal conductivity, improving the utilization rate of graphite, and reducing the amount of graphite used

Pending Publication Date: 2022-07-29
CHINA THREE GORGES UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adding too much graphite powder will cause damage to the organic matrix, resulting in a decrease in the mechanical properties of the composite material. In addition, due to the large contact thermal resistance between graphite powders, the thermal conductivity of this composite material is very limited.

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
  • Preparation method of graphite/epoxy resin composite material
  • Preparation method of graphite/epoxy resin composite material
  • Preparation method of graphite/epoxy resin composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) The natural flake graphite powder (200 mesh) and the thermosetting phenolic resin powder (500 mesh) are evenly distributed and mixed in a dry ball mill in a mass fraction ratio of 7:3 for 4 hours.

[0034] (2) The uniformly mixed natural flake graphite / phenolic resin powder obtained in step (1) was molded by selective laser sintering, using a laser power of 17W and a filling rate of 1900mm*s -1 , the filling spacing is 0.1mm, the layer thickness is 0.1mm, the preheating temperature is 40°C, and the contour scanning method is used for rapid printing to prepare a three-dimensional porous graphite skeleton green body with high thermal conductivity, continuous, multiple, and passages. The skeleton structure is as follows figure 1 shown.

[0035] (3) Put the graphite skeleton green body prepared in step (2) into a hot air drying oven, keep the temperature at 80°C for 10 minutes, keep at 120°C for 20 minutes, and keep at 160°C for 10 minutes after secondary curing treatme...

Embodiment 2

[0043] (1) The natural flake graphite powder (400 mesh) and the thermosetting phenolic resin powder (600 mesh) are evenly distributed and mixed in a dry ball mill in a ratio of 8:2 by mass fraction, and mixed for 5 hours.

[0044] (2) The uniformly mixed natural flake graphite / phenolic resin powder obtained in step (1) is formed by selective laser sintering technology, using a laser power of 15W, a filling rate of 1900mm*s-1, a filling spacing of 0.2mm, and a layer thickness of 0.2 mm, the preheating temperature is 50°C, and the contour scanning method is used to form and quickly print to prepare a three-dimensional porous graphite skeleton green body with high thermal conductivity, continuous, multiple channels, and the skeleton structure is as follows figure 2 shown.

[0045] (3) Put the graphite skeleton green body prepared in step (2) into a hot air drying oven, keep the temperature at 80°C for 10 minutes, keep at 120°C for 20 minutes, and keep at 160°C for 10 minutes aft...

Embodiment 3

[0052](1) The natural flake graphite powder (800 mesh) and the thermosetting phenolic resin powder (800 mesh) are evenly distributed and mixed in a dry ball mill in a mass fraction of 8:2 for 4 hours.

[0053] (2) The uniformly mixed natural flake graphite / phenolic resin powder obtained in step (1) was molded by selective laser sintering, using a laser power of 16W and a filling rate of 1900mm*s -1 , the filling spacing is 0.1mm, the layer thickness is 0.2mm, the preheating temperature is 60°C, and the contour scanning method is used for rapid printing to prepare a three-dimensional porous graphite skeleton green body with high thermal conductivity, continuous, multiple, and passages. The skeleton structure is as follows image 3 shown.

[0054] (3) Put the graphite skeleton green body prepared in step (2) into a hot air drying oven, keep at 80°C for 15 minutes, keep at 120°C for 20 minutes, and keep at 160°C for 10 minutes after secondary curing to obtain a graphite skeleton ...

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
densityaaaaaaaaaa
electrical resistanceaaaaaaaaaa
bending strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a graphite / epoxy resin composite material, which comprises the following basic process links: firstly, quickly printing a porous graphite skeleton biscuit by using a selective laser sintering molding technology, and carrying out post-treatments such as carbonization, multiple vacuum pressure impregnation, graphitization, overall surface copper plating and the like on the porous graphite skeleton biscuit; and pouring short carbon fiber reinforced epoxy resin matrix slurry into a mold, compounding the short carbon fiber reinforced epoxy resin matrix slurry with the copper-plated porous graphite skeleton, and completely curing to obtain the graphite / epoxy resin composite material. The graphite / epoxy resin composite material provided by the invention has the advantages of environmental protection, rapidness, high efficiency and low cost, and has good electric and heat conduction and mechanical properties, the comprehensive performance can be actively regulated and controlled by changing a porous graphite skeleton structure, and the composite material has wide application prospects in the field of communication engineering and the industry of electronic instruments and meters.

Description

technical field [0001] The patent of the present invention relates to a new type of graphite / epoxy resin composite material and a preparation method thereof, in particular to a rapid preparation method of a new type of graphite / epoxy resin composite material with high thermal conductivity, high electrical conductivity and excellent mechanical properties. technical background [0002] Polymer composite materials have comprehensive advantages such as light weight and high strength, corrosion resistance, acid and alkali resistance, salt spray resistance, aging resistance, impact resistance, and environmental adaptability. Graphite, as a kind of high thermal conductivity and conductive filler, has been widely used in industrial production by compounding it with various organic compounds. When graphite is used as filler to prepare organic composite materials, its electrical and thermal conductivity and mechanical properties are superior or not, depending on the type, quantity, si...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/02C08K7/24C08K7/06C08J5/10B29C69/00B29C64/153B29C64/379B29C39/10B33Y10/00B33Y40/20B33Y70/10
CPCC08K9/02C08K7/24C08K7/06C08J5/10C08J5/042B29C69/00B29C64/153B29C64/379B29C39/10B33Y10/00B33Y40/20B33Y70/10C08J2363/00C08K2201/001C08L63/00
Inventor 吴海华李言邓开鑫郝佳欢魏恒戢运鑫叶喜葱李波叶永盛赵光伟
Owner CHINA THREE GORGES UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com