Graphene conjugate fiber and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-2018274132-A1
Application number	US-201815898762-A
Country	US
Kind code	A1
Filing date	Feb 19, 2018
Priority date	Mar 15, 2011
Publication date	Sep 27, 2018
Grant date	—

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

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

• D01F1/10

  Other agents for modifying properties · CPC title

• D01F6/14

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

• B82Y30/00 Primary

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• D01D10/02

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

• D01D1/02

  Preparation of spinning solutions · CPC title