Preparation method of polyacrylonitrile/graphene composite-based carbon fiber

A polyacrylonitrile-based carbon fiber technology, which is applied in the chemical post-treatment of synthetic polymer artificial filaments, fiber chemical characteristics, conductive/anti-static filament manufacturing, etc., can solve the problem of not using graphene polyacrylonitrile solution spinning, etc. problems, achieve good application prospects, high preparation efficiency, and simple operation

Active Publication Date: 2012-07-11
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, there has been no report on the preparation of graphene-containing polyacrylonitrile solution by in-situ polymerization, nor has there been any report on the use of the graphene-polyacrylonitrile solution for spinning, and then through pre-oxidation and carbonization to obtain high-performance carbon fibers. to report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In the present embodiment, the preparation method of polyacrylonitrile / graphene composite-based carbon fiber comprises the following steps:

[0044] (1) 1g of graphene powder was added to 400g of dimethyl sulfoxide (DMSO) solvent, and ultrasonically dispersed by an ultrasonic cell pulverizer to obtain a graphene / DMSO dispersion.

[0045] Take by weighing two parts of 100g graphene / DMSO dispersion liquid, remaining graphene / DMSO dispersion liquid is standby;

[0046] Add 2g itaconic acid (IA) to one part of the graphene / DMSO dispersion of 100g, stir for 10min to make it dissolve completely, called A solution; add 1g Azobisisobutyronitrile (AIBN), stirred for 10 minutes to dissolve it completely, called B solution.

[0047] Add 100g acrylonitrile in mixing container, then add A solution and B solution successively, then add remaining graphene / DMSO dispersion liquid, pass into nitrogen and stir, obtain graphene, acrylonitrile monomer, IA monomer evenly dispersed, A mixed...

Embodiment 2

[0054] (1) 3g of graphene powder was added into 400g of DMSO solvent, and ultrasonically dispersed by an ultrasonic cell pulverizer to obtain a graphene / DMSO dispersion.

[0055] Take by weighing two parts of 100g graphene / DMSO dispersion liquid, remaining graphene / DMSO dispersion liquid is standby;

[0056] Take a 150g graphene / dispersion, a 50g graphene / dispersion, and the remaining graphene / DMSO dispersion for subsequent use;

[0057] Add 1g IA to 150g of graphene / dispersion, stir for 10min to make it dissolve completely, called A solution; add 1g AIBN to 50g of graphene / dispersion, stir for 10min to make it dissolve completely, call it B solution.

[0058] Add 150g acrylonitrile in mixing vessel, then add A solution and B solution successively, then add remaining graphene / DMSO dispersion liquid, pass into nitrogen and stir, obtain graphene, acrylonitrile monomer, IA monomer evenly dispersed, A mixed solution of AIBN initiator.

[0059] (2) The mixed solution obtained in...

Embodiment 3

[0065] (1) 0.2g of graphene powder was added into 1000g of DMSO solvent, and ultrasonically dispersed by an ultrasonic cell pulverizer to obtain a graphene / DMSO dispersion.

[0066] Take by weighing two parts of 100g graphene / DMSO dispersion liquid, remaining graphene / DMSO dispersion liquid is standby;

[0067] Add 4g IA, 1g methyl methacrylate in one part of the graphene / DMSO dispersion liquid of 100g, stir 20min and make it dissolve completely, be referred to as A solution; In another part of graphene / DMSO dispersion liquid of 100g Add 0.5g AIBN, stir for 30min to dissolve it completely, and call it B solution.

[0068] Add 250g acrylonitrile in mixing vessel, then add A solution and B solution successively, then add remaining graphene / DMSO dispersion liquid, pass into nitrogen and stir, obtain graphene, acrylonitrile monomer, IA monomer evenly dispersed, A mixed solution of methyl methacrylate monomer and AIBN initiator.

[0069] (2) The mixed solution obtained in step (1...

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Abstract

The invention discloses a preparation method of polyacrylonitrile/graphene composite-based carbon fiber, which comprises the following steps: firstly preparing a polyacrylonitrile mixed solution uniformly dispersed with graphene through an in-situ polymerization method, and then employing the mixed solution as a spinning solution and obtaining a polyacrylonitrile/graphene composite protofilament by a wet spinning or dry-jet wet spinning process, and finally making the protofilament subject to a pre-oxidation treatment and a carbonization treatment to obtain the polyacrylonitrile/graphene composite-based carbon fiber. Compared with the existing polyacrylonitrile-based carbon fiber, the carbon fiber prepared by the method of the invention has a significantly increased mechanical property, and the carbonation yield in the preparation process is improved, therefore, the preparation method is an efficient and reliable preparation method with good application prospects.

Description

technical field [0001] The invention belongs to the field of preparation of composite materials, in particular to a method for preparing carbon fibers based on polyacrylonitrile / graphene composites. Background technique [0002] Polyacrylonitrile fiber is obtained by spinning a polymer with acrylonitrile as the main structural unit. The carbon fiber made of polyacrylonitrile precursor has many excellent properties, such as high strength, high modulus, and low specific gravity. , high temperature resistance, corrosion resistance, fatigue resistance and excellent electrical and thermal conductivity. Therefore, composite materials made of polyacrylonitrile-based carbon fibers are widely used in aerospace, bridges and seismic reinforcement, submarine oil pipelines, wind power generation fins, and automotive parts due to their excellent performance and unique functions. [0003] Graphene has a two-dimensional planar nanostructure and a very high specific surface area. It is anot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/22D01F1/09D01F11/06C08F220/44
Inventor 陈友汜欧阳琴陈宜波杨建行莫高明黄显雯马洪波
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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