Nanocarbon composite carbon fiber with low cost and high performance and their preparation method

Patent metadata

Field	Value
Publication number	US-10344404-B2
Application number	US-201615162052-A
Country	US
Kind code	B2
Filing date	May 23, 2016
Priority date	May 26, 2015
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

The present disclosure relates to a preparation method for lowering a production cost of a high performance carbon fiber using a nanocarbon composite carbon fiber precursor fiber crosslinked by electron beam. More particularly, the present disclosure relates to a preparation method of a nanocarbon composite carbon fiber, including a nanocarbon containing step for containing nanocarbon in a structure of a carbon fiber precursor fiber, a nanocarbon composite carbon fiber precursor fiber preparation step for forming a composite of the nanocarbon and the carbon fiber precursor fiber by electron beam irradiation to enable crosslinking for improved heat resistance of the carbon fiber precursor fiber containing the nanocarbon, an oxidation⋅stabilization step for oxidizing⋅stabilizing the nanocarbon composite carbon fiber precursor fiber, and a carbonization step for carbonizing the oxidized⋅stabilized nanocarbon composite carbon fiber precursor fiber, and a nanocarbon composite carbon fiber prepared by the preparation method.

First claim

What is claimed is:

1. A preparation method of a nanocarbon composite carbon fiber, comprising:
a nanocarbon containing step for containing nanocarbon in a structure of a carbon fiber precursor fiber;
a nanocarbon composite carbon fiber precursor fiber preparation step for forming a composite of the nanocarbon and the carbon fiber precursor fiber by electron beam irradiation to enable crosslinking for improved heat resistance of the carbon fiber precursor fiber containing the nanocarbon;
an oxidation⋅stabilization step for oxidizing⋅stabilizing the nanocarbon composite carbon fiber precursor fiber; and
a carbonization step for carbonizing the oxidized⋅stabilized nanocarbon composite carbon fiber precursor fiber,
wherein the nanocarbon composite carbon fiber precursor fiber preparation step is performed in air within a temperature range of from a room temperature to 300° C. by electron beam irradiation with energy of 50 kGy˜5000 kGy.

2. The preparation method of a nanocarbon composite carbon fiber according to claim 1 , wherein the nanocarbon containing step comprises containing the nanocarbon in the structure of the carbon fiber precursor fiber by wet spinning or dry jet wet spinning of the nanocarbon and a carbon fiber precursor.

3. The preparation method of a nanocarbon composite carbon fiber according to claim 1 , wherein the carbon fiber precursor fiber is polyacrylonitrile for textiles or an acrylic fiber including a carbon fiber precursor having 95 wt % or more of acrylonitrile (AN) monomers, and the nanocarbon is selected from the group consisting of carbon nanotube (CNT), carbon nano fiber (CNF), graphite nano fiber (GNF), graphene, graphene oxide, and fullerene.

4. The preparation method of a nanocarbon composite carbon fiber according to claim 1 , wherein the oxidation⋅stabilization step is performed by thermal energy in air or by generating a plasma while mixing and injecting argon gas as plasma generating gas and oxygen gas as reactive gas into a reaction chamber under atmospheric pressure or vacuum.

5. The preparation method of a nanocarbon composite carbon fiber according to claim 4 , wherein the oxidation⋅stabilization step is performed in a temperature range of 180˜350° C. under oxidizing atmosphere in the presence of oxygen.

6. The preparation method of a nanocarbon composite carbon fiber according to claim 4 , wherein the oxidation⋅stabilization step is performed for 30 minutes˜250 minutes.

7. The preparation method of a nanocarbon composite carbon fiber according to claim 1 , wherein the carbonization step comprises carbonizing the oxidized⋅stabilized nanocarbon composite carbon fiber precursor fiber by thermal energy or microwave assisted plasma.

8. The preparation method of a nanocarbon composite carbon fiber according to claim 1 , after the carbonization step, further comprising:
a graphitization step by thermal energy or microwave assisted plasma at higher temperature than a carbonization temperature.

Assignees

• Korea Inst Sci & Tech

Inventors

• Jo Seong-Mu
• Lee Sung-Ho
• Joh Han-Ik
• Park Se-Joon
• YEO Hyeon-uk
• Ku Bon-Cheol

Classifications

• C04B35/83

  Carbon fibres in a carbon matrix · CPC title

• D01F1/10

  Other agents for modifying properties · CPC title

• D01F9/225 Primary

  from stabilised polyacrylonitriles · CPC title

• D01F11/16

  by physicochemical methods · CPC title