Method for manufacturing a carbon fibre, precursor material used by the method and carbon fibre obtained

Patent metadata

Field	Value
Publication number	US-9909235-B2
Application number	US-201314437701-A
Country	US
Kind code	B2
Filing date	Oct 18, 2013
Priority date	Oct 22, 2012
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

A method for manufacturing a continuous carbon fiber from a precursor material. According to this method, a precursor material including a continuous natural fiber and carbon nanofillers is used, said natural fiber being obtained from at least one plant constituent such as a cellulose. A process for manufacturing a continuous carbon fiber from a precursor material, including a step of carbonization of said precursor material, in which the precursor material includes a continuous natural fiber and carbon nanofillers, said natural fiber being obtained from at least one plant constituent, wherein it also includes a step of sizing the precursor material before the carbonization step.

First claim

The invention claimed is:

1. A process for manufacturing a continuous carbon fiber from a precursor material, comprising a step of carbonization of said precursor material, in which the precursor material comprises a continuous natural fiber and carbon nanofillers, said natural fiber being obtained from at least one plant constituent, wherein the process also comprises a step of sizing the precursor material before the carbonization step,
wherein the carbon nanofillers are carbon nanotubes, and
wherein the carbon nanofillers content by weight is from 0.01% to 0.45%, relative to the weight of the natural fiber
wherein the natural fiber is obtained from a solution of cellulose, and extrusion in a die so as to form a continuous hydrocellulose fiber.

2. The process for manufacturing a carbon fiber as claimed in claim 1 , wherein the precursor material comprises at least one natural fiber modified by introduction of the carbon nanofillers during the manufacture of said natural fiber.

3. The process for manufacturing a carbon fiber as claimed in claim 2 , wherein the carbon nanofillers are introduced by means of an aqueous dispersion in a solution containing at least one plant constituent used for the manufacture of the natural fiber.

4. The process for manufacturing a carbon fiber as claimed in claim 1 , wherein the precursor material comprises at least one natural fiber modified via provision of carbon nanofillers, carried out on said fiber before the carbonization step.

5. The process for manufacturing a carbon fiber as claimed in claim 1 , wherein the provision of carbon nanofillers on the natural fiber is carried out during the sizing step, the carbon nanofillers being introduced into the sizing bath.

6. The process for manufacturing a carbon fiber as claimed in claim 1 , wherein the natural fiber is obtained from cellulose or from lignocellulose.

7. The process for manufacturing a carbon fiber as claimed in claim 1 , wherein the carbon nanofillers content by weight is from 0.03% to 0.45%, relative to the weight of the natural fiber.

8. The process for manufacturing a carbon fiber as claimed in claim 1 , wherein the sizing step comprises passing the precursor material through a sizing bath comprising ammonium chloride and urea.

9. The process for manufacturing a carbon fiber as claimed in claim 1 , wherein the process comprises a graphitization step carried out after the carbonization step, at a temperature of 2000° C. to 3000° C., for a period of 8 to 15 minutes.

Assignees

• Arkema France

Inventors

• Korzhenko Alexander
• Gaillard Patrice
• Tymoshenko Andriy
• Goryashkin Anatolly
• Zakharov Dimitry

Classifications

• D01F9/16 Primary

  from products of vegetable origin or derivatives thereof, e.g. from cellulose acetate (D01F9/18 takes precedence) · CPC title

• D01F1/10

  Other agents for modifying properties · CPC title

• D06M2101/06

  cellulosic · CPC title

• C08L1/26

  Cellulose ethers · CPC title

• D06M11/74

  with carbon or graphite; with carbides; with graphitic acids or their salts · CPC title