CARBON FIBER COMPOSITION INCLUDING GRAPHENE NANO-POWDER AND FABRICATION METHOD FOR CARBON FIBER USING THE SAME

• US 20170114478A1
• Filed: 11/08/2016
• Published: 04/27/2017
• Est. Priority Date: 07/13/2012
• Status: Active Grant

• Current Assignee: Korea Advanced Institute of Science and Technology
• Original Assignee: Korea Advanced Institute of Science and Technology
• Inventors: LEE, Jae Kap, CHOI, Won Kook
• Granted Patent: US 10,407,801 B2
• Time in Patent Office: Days
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: B82Y 40/00 Manufacture or treatment of nanostructures
• CPC Class Codes: C01B 32/184 Preparation
• CPC Class Codes: C01B 32/205 Preparation
• CPC Class Codes: C01P 2004/17 Nanostrips, nanoribbons or nanobelts, i.e. solid nanofibres with two significantly differing dimensions between 1-100 nanometer
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08K 3/043 Carbon nanocoils
• CPC Class Codes: C08K 5/20 Carboxylic acid amides
• CPC Class Codes: C08K 7/06 Elements
• CPC Class Codes: D01F 9/145 from pitch or distillation residues
• CPC Class Codes: D01F 9/16 from products of vegetable origin or derivatives thereof, e.g. from cellulose acetate D01F9/18 takes precedence
• CPC Class Codes: D01F 9/22 from polyacrylonitriles
• CPC Class Codes: D01F 9/225 from stabilised polyacrylonitriles
• CPC Class Codes: D10B 2101/12 Carbon; Pitch
• CPC Class Codes: Y10S 977/734 Fullerenes, i.e. graphene-based structures, such as nanohorns, nanococoons, nanoscrolls or fullerene-like structures, e.g. WS2 or MoS2 chalcogenide nanotubes, planar C3N4, etc.
• CPC Class Codes: Y10S 977/842 for carbon nanotubes or fullerenes

Abstract

The present disclosure relates to a carbon fiber composition and a fabrication method for high-performance carbon fiber using the same. The method can fabricate high-performance carbon fiber (or graphite fiber) with lowering a graphitization temperature by using graphene carbon fiber composition including nano-sized graphene.

Claims

1. A method for fabricating high-performance carbon fiber, the method comprising steps of:

a mixing step to making a graphene carbon fiber composition by mixing a composition for fabricating carbon fiber, and graphene powder, wherein the composition for fabricating carbon fiber includes one selected from the group consisting of polyacrylonitrile (PAN)-based carbon fiber, pitch-based carbon fiber, rayon-based carbon fiber and combinations thereof; and

a heat treatment step of the graphene carbon fiber composition, and

wherein the graphene powder serves as a seed of nanoribbon-shaped graphite to be formed during carbon fiber fabricating processes.

2. The method of claim 1, wherein the graphene powder is fabricated by decomposing crystalline graphite, and has a length of 20 nm or less.

3. The method of claim 2, wherein the crystalline graphite is a graphite structure grown in a helix shape.

4. The method of claim 1, wherein a content of the graphene powder is more than 0.1 wt % based on 100 wt % of the sum of the composition for fabricating carbon fiber and the graphene powder.

5. The method of claim 1, the mixing step further comprising a solvent, wherein the solvent is selected from the group consisting of alcohol, acetone, dimethylformamide (DMF), tetrahydrofuran (THF) and combinations thereof.

6. A method for fabricating high-performance carbon fiber, the method comprising steps of:

a mixing step to fabricate a graphene suspension by mixing a composition for fabricating carbon fiber with graphene powder to form a graphene carbon fiber composition, and dispersing the graphene carbon fiber composition in a solvent, wherein the composition for fabricating carbon fiber includes one selected from the group consisting of polyacrylonitrile (PAN)-based carbon fiber, pitch-based carbon fiber, rayon-based carbon fiber and combinations thereof;

a fabrication step to fabricate mixed-fiber by controlling a viscosity of the graphene suspension and performing a fiberization process of the graphene suspension;

a stabilization step to stabilize the fibers by heating at 200˜

400 °

C. under atmosphere; and

a heat treatment step of fabricating nano ribbon-shaped graphite by graphitization the flame resistant fiber at a temperature less than 2,500°

C.,

wherein the graphene powder included in the graphene carbon fiber composition serves as a seed of graphite to be formed during high-performance carbon fiber fabricating processes.

7. The method of claim 6, wherein the graphitization of the heat treatment step is performed at a temperature in the range of 1,500°

C. and greater to less than 2,500°

C.