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Para-aramid nanofiber/high-performance carbon fiber composite paper and preparation method thereof

A nanofiber, para-aramid fiber technology, applied in the field of papermaking, can solve the problems of low elongation at break, poor fiber bonding force, brittle failure, etc. Effect

Active Publication Date: 2021-08-24
山东聚芳新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aramid fiber is a high-performance fiber material with high strength, high modulus, light weight, folding resistance, high temperature resistance, flame retardancy and corrosion resistance, but it has the characteristics of difficult heat conduction, easy flocculation and difficult dispersion; carbon fiber has high strength High modulus, corrosion resistance, good thermal stability, but there are disadvantages such as low elongation at break, poor bonding force between fibers during compounding, and brittle failure easily

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A para-aramid nanofiber and high-performance carbon fiber composite material paper, the raw material components include component A and component B, and the mass ratio of component A to component B is 30:70 based on the dry weight of the fiber .

[0044] (1) Surface treatment of carbon fibers (6mm in length): Carry out high-temperature etching treatment on carbon fibers in a muffle furnace at a high temperature of 400°C, the treatment time is 1 hour, and the treatment is completed and cooled for later use;

[0045] (2) Preparation of component A: Disperse carbon fiber in deionized water through a high-frequency comber, and adjust the concentration of dispersion to 0.1%. Among them, the amount of dispersant is 1% of the mass of carbon fiber, and the amount of surfactant is 9% of the mass of carbon fiber. ; The frequency of the defibrillator is 8000r / min; the duration of defibrillation is 5min;

[0046] (3) Preparation of component B (average diameter 10-200nm): disperse...

Embodiment 2

[0054] A para-aramid nanofiber and high-performance carbon fiber composite paper, its raw material components include component A and component B, based on the fiber dry weight, the mass ratio of component A to component B is 25:75 .

[0055] (1) Surface treatment of carbon fiber (length 7mm): Treat at a high temperature of 450°C for 0.5 hours, and cool down for later use.

[0056] (2) Preparation of component A: Disperse the carbon fiber in deionized water through a high-frequency comber, and adjust the concentration to 0.01%. Among them, the amount of dispersant is 3% of the mass of carbon fiber, and the amount of surfactant is 6% of the mass of carbon fiber; the frequency of deflagger is 10000r / min; the duration of deflagration is 5min;

[0057] (3) Preparation of component B (average diameter 10-200nm): disperse component B into a dispersion liquid with deionized water, and the dispersion concentration is 0.1%.

[0058] (4) Mix component A and 85% component B (the total ...

Embodiment 3

[0065] A para-aramid nanofiber and high-performance carbon fiber composite material paper, its raw material components include component A and component B, based on the fiber dry weight, the mass ratio of component A to component B is 20:80 .

[0066] (1) Surface treatment of carbon fiber (8mm in length): process at a high temperature of 420°C for 0.8 hours, and cool down for later use;

[0067] (2) Preparation of component A: Disperse carbon fiber in deionized water through a high-frequency comber, and adjust the concentration of dispersion to 0.05%. Among them, the amount of dispersant is 6% of the mass of carbon fiber, and the amount of surfactant is 5% of the mass of carbon fiber. ; The frequency of the defibrillator is 15000r / min; the duration of the defibrillator is 4min;

[0068] (3) Preparation of component B (average diameter 10-200nm): disperse component B into a dispersion liquid with deionized water, and the dispersion concentration is 0.2%;

[0069] (4) Mix comp...

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Abstract

The invention belongs to the field of papermaking technologies and materials, and particularly relates to para-aramid nanofiber / high-performance carbon fiber composite paper and a preparation method thereof. By utilizing the characteristics of a large specific surface area, easy dispersion in an aqueous solution and the like of para-aramid nanofibers, the para-aramid nanofibers can replace a traditional wet strength agent and an adhesive for pulp; the para-aramid nanofibers can be fully and uniformly mixed with a high-performance carbon fiber solution, and a wet paper sheet of para-aramid and carbon fibers is prepared through wet papermaking; then a para-aramid nanofiber dispersion liquid is subjected to spraying and sizing on the surface of the aramid wet paper sheet; then compounding, drying and forming are conducted; and thus, the sprayed and compounded paper sheet can remarkably improve the uniformity and mechanical strength of the composite paper, improve the production efficiency of a composite paper-based material and the like, and can fully realize the compounding of the carbon fibers and the aramid fibers. A composite material prepared by using the method has good heat resistance and chemical stability and excellent heat conduction and electric conduction performance.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to a para-aramid nanofiber and high-performance carbon fiber composite paper and a preparation method thereof. Background technique [0002] In recent years, the research and application of high-performance materials have developed rapidly. As a new type of synthetic fiber material with high strength, high modulus and high temperature resistance, aramid has attracted more and more attention. Aramid paper prepared from aramid fiber through papermaking process has excellent dielectric properties, mechanical properties, high temperature resistance, chemical corrosion resistance and flexible designability. Carbon fiber has the advantages of light weight, high specific strength, high temperature resistance, and corrosion resistance, and has great development potential in the development of high-speed trains. Both fibers are widely used in aerospace, rail transit and othe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H13/50D21H17/55D21H21/06D21H21/08D21H23/50
CPCD21H13/50D21H21/08D21H21/06D21H17/55D21H23/50
Inventor 张云奎刘余田周鹏飞姚坤承董志荣李双昌庄锐刘焕良孟军
Owner 山东聚芳新材料股份有限公司
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