Method for manufacturing graphene fiber

Patent metadata

Field	Value
Publication number	US-10458046-B2
Application number	US-201815898762-A
Country	US
Kind code	B2
Filing date	Feb 19, 2018
Priority date	Mar 15, 2011
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

The present invention relates to a graphene conjugate fiber and a method for manufacturing same, and more particularly, to a conjugate fiber including graphene and a polymer, wherein a wrinkled structure of the graphene is maintained in a fiber state. The graphene conjugate fiber manufactured thereby has superior mechanical properties, is flexible, and has high utility by being manufactured as a fiber.

First claim

The invention claimed is:

1. A method for producing a graphene composite fiber, the method comprising:
a) dispersing graphene and a surfactant in a solvent to prepare a dispersion,
b) spinning the dispersion into a coagulation bath containing polymer solution to form a graphene-gel fiber, and
c) drying the graphene-gel fiber to produce the graphene composite fiber.

2. The method according to claim 1 , further comprising d) annealing the graphene composite fiber obtained in c) at a temperature of 140 to 160° C.

3. The method according to claim 1 , further comprising d′) dipping the graphene composite fiber obtained in c) in methanol or acetone to improve the degree of crystallization of the graphene composite fiber.

4. The method according to claim 1 , wherein the graphene is chemically reduced graphene.

5. The method according to claim 1 , wherein the graphene is chemically reduced graphene with acid functional groups.

6. The method according to claim 5 , wherein the chemically reduced graphene is prepared by reducing an aqueous dispersion of graphene with hydrazine at 90 to 100° C. for 1 to 24 hours.

7. The method according to claim 1 , wherein the surfactant is selected from sodium dodecyl benzene sulfonate (SDBS), sodium dodecyl sulfonate (SDS), Triton X-100, and cetyltrimethylammonium bromide (CTAB).

8. The method according to claim 1 , wherein the solvent is water.

9. The method according to claim 1 , wherein, in the coagulation bath, the polymer from the polymer solution is incorporated into the spun dispersion to form the graphene-gel fiber in which the graphene is surrounded by the polymer.

10. The method according to claim 1 , wherein, during drying, the graphene gel-fiber is vertically suspended and dried.

11. The method according to claim 1 , wherein the graphene is a graphene flake.

Assignees

• Iucf Hyu

Inventors

• Kim Seon Jeong
• Shin Min Kyoon
• Kim Shi Hyeong

Classifications

• D01F6/14

  from polymers of unsaturated alcohols, e.g. polyvinyl alcohol, or of their acetals or ketals · CPC title

• D01D1/02

  Preparation of spinning solutions · CPC title

• D01D10/02

  Heat treatment (heating for finishing D02J13/00) · CPC title

• D01F1/10

  Other agents for modifying properties · CPC title

• Y10T428/2918

  including free carbon or carbide or therewith [not as steel] · CPC title