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Method for preparing graphene-reinforced polyacrylonitrile carbon fibers

A technology of polyacrylonitrile carbon fiber and polyacrylonitrile, which is applied in the field of preparation of polyacrylonitrile carbon fiber, can solve the problems such as the preparation method and process of graphene-reinforced polyacrylonitrile-based carbon fiber, which have not been reported, and can improve the dispersion and interfacial bonding force. , The preparation process is simple and the effect is easy to control

Inactive Publication Date: 2012-07-18
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing data show that a lot of efforts have been made in utilizing graphene to enhance the performance of polymers, but the preparation method and process of utilizing graphene to enhance polyacrylonitrile-based carbon fibers have not been reported.

Method used

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  • Method for preparing graphene-reinforced polyacrylonitrile carbon fibers
  • Method for preparing graphene-reinforced polyacrylonitrile carbon fibers
  • Method for preparing graphene-reinforced polyacrylonitrile carbon fibers

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Using natural graphite as raw material, graphite oxide was prepared by Hummer method. Add 92ml of concentrated sulfuric acid to a three-necked flask, stir in an ice-water bath until the temperature drops to 0°C to 3°C, then add 4g of natural graphite powder and 2g of sodium nitrate (NaNO 3 ), then stir evenly, while stirring, slowly add 60g potassium permanganate (KMnO 4 ), and ensure that the temperature is less than 20°C. After the addition is complete, heat the solution to 35±3°C and keep it for 30 minutes, then slowly add distilled water, and control the temperature within 100°C; after 15 minutes, add a large amount of distilled water and 10ml of 30% hydrogen peroxide (H 2 o 2 ) to terminate the reaction. The mixture was treated by centrifugation, filtered, washed several times with an aqueous solution containing 5% HCl, and dried in vacuum at 50-60°C to obtain a graphite oxide sample; then 2.5 g of graphite oxide was dispersed in 100 ml of N, N'-dimethyletha...

Embodiment 2

[0032] (1) Using natural graphite as raw material, graphite oxide was prepared by the Staudenmaier method. Disperse graphite oxide in water, ultrasonic power is 500W, after ultrasonic for 60 minutes, centrifuge at 5000rpm for 4 minutes, collect the upper layer solution, then centrifuge at 15000rpm for 2 minutes, collect the precipitate, and vacuum dry at 60°C to obtain graphene oxide powder. Get 2.5g graphene oxide and disperse it in 100ml N, N'-dimethylacetamide (DMAc), obtain yellow-brown dispersion liquid, after ultrasonic 40min, obtain exfoliated graphene oxide suspension uniformly dispersed in DMAc .

[0033] (2) Add 16.2g of polyacrylonitrile powder into 100ml of N,N-dimethylacetamide (DMAc) solvent, swell at 15°C for 4 hours, slowly heat the water bath to 70°C, and continue to stir for 1.5h to obtain a uniform Polyacrylonitrile (PAN) solution.

[0034] (3) Get the graphene oxide suspension that 20ml prepares, join in the polyacrylonitrile solution of 100ml, stir 4.5h...

Embodiment 3

[0037] (1) Using natural graphite as raw material, graphite oxide was prepared by Brodie method. Disperse graphite oxide in water, ultrasonic power is 500W, after ultrasonic for 60 minutes, centrifuge at 5000rpm for 4 minutes, collect the upper layer solution, then centrifuge at 15000rpm for 2 minutes, collect the precipitate, and vacuum dry at 60°C to obtain graphene oxide powder. Get 2g graphene oxide and be dispersed in 100mlN, in the N'-dimethylacetamide (DMAc), obtain yellow-brown dispersion liquid, after ultrasonic 40min, obtain the graphene oxide suspension that exfoliates uniformly dispersed in DMAc.

[0038] (2) Add 19.5g of polyacrylonitrile powder to 100ml of N,N-dimethylacetamide (DMAc) solvent, swell at 8°C for 4 hours, slowly heat the water bath to 70°C, and continue stirring for 1.5h to obtain a uniform Polyacrylonitrile (PAN) solution.

[0039] (3) Get the graphene oxide suspension prepared by 25ml, join in the polyacrylonitrile solution of 100ml, stir 4.5h a...

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Abstract

The invention relates to a method for preparing graphene-reinforced polyacrylonitrile carbon fibers. The method comprises the following steps of: (1) preparing graphene or graphene oxide; (2) preparing a graphene / polyacrylonitrile spinning solution; (3) preparing graphene / polyacrylonitrile-based composite fibers; and (4) preparing graphene / polyacrylonitrile-based carbon. By the method, the dispersibility and interface bonding strength of the graphene oxide in a polymer matrix are effectively improved, and the comprehensive performance of the carbon fibers is further improved; the mechanical properties of the prepared carbon fibers are obviously improved, and the prepared carbon fibers can be used in the fields such as material reinforcement, electric conduction, anti-static electricity and heat conduction; and moreover, the preparation process is simple, easy to control and low in cost.

Description

technical field [0001] The invention belongs to the field of preparation of polyacrylonitrile carbon fibers, in particular to a preparation method of graphene-reinforced polyacrylonitrile carbon fibers. Background technique [0002] Polyacrylonitrile is a fiber made of polymer with acrylonitrile as the main chain structure unit after spinning. The carbon fiber prepared with polyacrylonitrile precursor as the precursor has the best comprehensive performance, and the output accounts for more than 90%. Polyacrylonitrile-based carbon fiber integrates high mechanical strength, high modulus, low specific gravity, high temperature resistance, chemical resistance and excellent electrical, physical and mechanical properties. Its excellent performance and unique functions are widely used in aviation, aerospace, weapons and ships. , automobiles, machinery manufacturing, textiles, chemicals, electronics, communications, medical equipment and other industrial fields, as well as sports an...

Claims

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Application Information

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IPC IPC(8): D01F9/22D01F1/10
Inventor 张清华尹朝清赵昕罗伟强陈大俊
Owner DONGHUA UNIV
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