Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of high-performance mesophase pitch based graphite fiber

A technology of mesophase pitch, graphite fiber, applied in the chemical characteristics of fiber, rayon manufacturing, textile and paper making, etc., can solve the problems of splitting, weakening fiber process performance and so on

Active Publication Date: 2019-08-20
湖南东映碳材料科技股份有限公司
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the mesophase pitch-based graphite fiber with radial structure has the highest thermal conductivity, which can reach 1100W / mK, but it is prone to split-like structure, which greatly weakens the process performance of the fiber.

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

Embodiment 1

[0009] The mesophase pitch is modified by boron-doped graphene quantum dots. The raw material of the mesophase pitch is petroleum tar, the content of the mesophase is 98%, the ash content is 50ppm, and the softening point is 240ºC. Boron-doped graphene quantum dots are prepared by constant potential electrolysis, the voltage is 3V, the electrolyte is 0.5mol / L borax solution, the anode of the electrolysis system is a high-purity graphite rod, the cathode is a Pt electrode, and the current intensity is 0.05mA. The electrolysis time is 1 hour. After electrolysis, it is filtered through a 10nm microporous membrane to obtain a filtrate, which is washed with deionized water, dried, and vacuum-dried to obtain a solid of boron-doped graphene quantum dots. The particle size of the prepared boron-doped graphene quantum dots is 8-10nm. Use toluene to disperse boron-doped graphene quantum dots, configure the concentration of boron-doped graphene quantum dots to be 0.1g / L, and use ultrason...

Embodiment 2

[0011] The mesophase pitch is modified by boron-doped graphene quantum dots. The raw material of the mesophase pitch is coal tar, the content of the mesophase is 99%, the ash content is 30ppm, and the softening point is 270ºC. Boron-doped graphene quantum dots are prepared by constant potential electrolysis, the voltage is 3V, the electrolyte is 1mol / L borax solution, the anode of the electrolysis system is a high-purity graphite rod, the cathode is a Pt electrode, and the current intensity is 0.1mA. The time is 2 hours. After electrolysis, filter through a 10nm microporous membrane to obtain a filtrate, wash and dry with deionized water, and dry in vacuum to obtain a solid of boron-doped graphene quantum dots. The particle size of the prepared boron-doped graphene quantum dots is 5-7nm. Use toluene to disperse boron-doped graphene quantum dots, configure the concentration of boron-doped graphene quantum dots to be 2g / L, and use ultrasonic stirring for 1h to mix uniformly unde...

Embodiment 3

[0013] The mesophase pitch is modified by boron-doped graphene quantum dots. The raw material of the mesophase pitch is synthetic naphthalene, the content of the mesophase is 100%, the ash content is 20ppm, and the softening point is 300ºC. Boron-doped graphene quantum dots are prepared by constant potential electrolysis, the voltage is 3V, the electrolyte is 2mol / L borax solution, the anode of the electrolysis system is a high-purity graphite rod, the cathode is a Pt electrode, and the current intensity is 0.2mA. The time is 3 hours. After electrolysis, filter through a microporous membrane to obtain a filtrate, wash and dry with deionized water, and dry in vacuum to obtain a solid of boron-doped graphene quantum dots. The particle size of the prepared boron-doped graphene quantum dots is 2-4nm. Use toluene to disperse boron-doped graphene quantum dots, configure the concentration of boron-doped graphene quantum dots to be 5g / L, and use ultrasonic stirring for 2h to mix evenl...

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
particle diameteraaaaaaaaaa
Ash contentaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of high-performance mesophase pitch based graphite fiber. Boron-doped graphene quantum dots are prepared with a constant potential electrolytic method, ananode of an electrolytic system is a graphite rod, a cathode is a Pt electrode, a microporous filtering membrane is used for filtration after electrolysis, filtrate is obtained, and boron-doped graphene quantum dot solids are obtained through washing with deionized water, drying and vacuum drying. The mesophase pitch is modified with the boron-doped graphene quantum dots, the boron-doped graphenequantum dots are dispersed with toluene to configure the concentration, and later, the boron-doped graphene quantum dots and the mesophase pitch are stirred in a mixed inert atmosphere at the temperature of 280-350 DEG C for spinning. After spinning, pre-oxidation treatment, low-temperature carbonization treatment and induced graphitization treatment are performed, and the mesophase pitch based graphite fiber is obtained. The prepared graphite fiber has the heat conductivity of 800-1,200 W / m.K, has a fiber interface of a typical radial structure, does not split, is good in processing propertyand is a satellite CFRP (carbon fiber reinforced plastics) skin reinforced material with good performance.

Description

technical field [0001] The invention relates to a preparation method of a high-performance mesophase pitch-based graphite fiber that can be used for satellite CFRP skin materials. Background technique [0002] With the development of science and technology, large and small satellite public platform technology, and new spacecraft payload technology have put forward higher requirements for the new generation of spacecraft structural materials, especially graphite fiber materials for CFRP. Mesophase pitch-based graphite fiber has the advantages of light weight, high strength, high modulus and high thermal conductivity, and is the preferred material for CFRP skins for satellites. The CFRP skin made of mesophase pitch-based graphite fibers has an unparalleled advantage of high thermal conductivity, which can quickly relieve the problem of uneven cold and heat caused by satellite components and sunlight, and the higher the thermal conductivity, the better the service stability of ...

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): D01F9/155D01F9/15D01F9/145D01F1/10
CPCD01F1/10D01F9/145D01F9/15D01F9/155
Inventor 刘金水黄东叶崇刘玲余洋伍孝
Owner 湖南东映碳材料科技股份有限公司