Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method for interface modification of carbon/carbon composite material by graphene/polymer coating

A technology of polymer coating and carbon composite materials, applied in the direction of graphene, nano-carbon, etc., can solve the problems of high temperature resistance, etc., and achieve the effects of improved ablation resistance, interface performance and low cost

Inactive Publication Date: 2012-11-28
HARBIN INST OF TECH
View PDF2 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the defect that the modified carbon / carbon composite material prepared by the existing interface modification method is not resistant to high temperature, and to provide a method for graphene / polymer coating interface modified carbon / carbon composite material

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

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0014] Specific embodiment one: This embodiment is a method for modifying the carbon / carbon composite material at the interface of a graphene / polymer coating, which is specifically completed according to the following steps:

[0015] 1. Graphite oxidation: first mix strong oxidizing acid and nitrate evenly, then add graphite, and cool down from room temperature to -5°C~0°C. Add a strong potassium-containing oxidant under the condition of 120mg / min, then raise the temperature to 10°C~30°C, and continue stirring at a stirring speed of 300rpm~500rpm for 5h~10h to obtain a reaction mixture, and then transfer the reaction liquid to a temperature of 10 ℃~50℃ in a warm water bath, and continue to react for 40min~2h to obtain a reaction solution, then add hot water at 90℃~100℃ to boil the reaction solution and continue boiling for 20min~5h, then add a mass fraction of 55%~65 % hydrogen peroxide aqueous solution, and stir to mix evenly, then let it stand for 0.5h~1h, then wash with ult...

specific Embodiment approach 2

[0029] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the nitrate described in the step one is sodium nitrate, potassium nitrate, calcium nitrate, magnesium nitrate etc.; The strong oxidizing acid described in the step one is Concentrated sulfuric acid or perchloric acid; Potassium-containing strong oxidizing agent described in step one is potassium permanganate or potassium perchlorate. Others are the same as the first embodiment.

specific Embodiment approach 3

[0030] Specific embodiment three: the difference between this embodiment and one of specific embodiments one or two is: the specific operation of the water washing described in step one is as follows: first, the mixture after standing is centrifuged at a centrifugal speed of 4000rpm~6000rpm for 20min ~40min to obtain a solid, then add ultrapure water to the solid, and stir at a stirring speed of 50rm~150rmp for 8min~12min, and then centrifuge at a centrifugal speed of 3000rpm~12000rpm for 20min~40min to obtain a solid after washing once. Continue to add ultrapure water, stir and centrifuge repeatedly to the obtained solid after washing until there is no SO in the supernatant obtained by centrifugation. 4 2- So far, that is, there is no SO in the filter cake obtained by centrifugation 4 2- until. Others are the same as those in Embodiment 1 or 2.

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
shear strengthaaaaaaaaaa
shear strengthaaaaaaaaaa
Login to View More

Abstract

A method for interface modification of carbon / carbon composite material by graphene / polymer coating, relates to a carbon / carbon composite material modification method. The method aims to resolve the disadvantage that the modification carbon / carbon composite material prepared by existing interface modification methods could not endure high temperature. The method comprises the following steps: 1, oxidizing graphite to obtain oxidized graphite powder; 2, preparing a solution of oxidized graphene; 3, purification; 4, preparing the graphene; 5, preparing a graphene / polymer coating solution; 6, coating carbon fibers; 7, carbonization processing. The method is advantageous in that: 1, the operation is simple and the cost is low; and 2, interface properties of the carbon / carbon composite material prepared by the method are improved by 20-80%, macroscopic mechanical properties of the carbon / carbon composite material prepared by the method are improved by 3-30%, and ablation resistance properties of the carbon / carbon composite material prepared by the method are improved by 10-50%, compared with those of the untreated materials. The method is mainly used for preparing interface modification carbon / carbon composite materials.

Description

technical field [0001] The invention relates to a method for modifying carbon / carbon composite materials. Background technique [0002] Carbon / carbon composite material is a new type of high-temperature material with unique properties. It combines the excellent mechanical properties of fiber-reinforced composite materials and the excellent high-temperature performance of carbonaceous materials. A series of excellent properties such as thermal shock, corrosion resistance and good vibration absorption. The density of the material is less than 2.0g / cm 3 , only 1 / 4 of the nickel-based superalloy, 1 / 2 of the ceramic material, especially as the temperature rises (up to 2500 ° C), the strength of this material not only does not decrease, but is even higher than room temperature, which is other The unique performance that the material can't match. Therefore, carbon / carbon composite materials have been widely used in the aerospace field. For example, key parts of aircraft systems...

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): C04B35/83C01B31/04C01B32/184
Inventor 姜再兴李晶波张大伟黄玉东刘丽田雪松周波李萌布赫张冬洁马梓阳
Owner HARBIN INST OF TECH
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
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