GRAPHENE CONJUGATE FIBER AND METHOD FOR MANUFACTURING SAME

• US 20140011027A1
• Filed: 03/09/2012
• Published: 01/09/2014
• Est. Priority Date: 03/15/2011
• Status: Abandoned Application

• Current Assignee: Industry-University Cooperation Foundation Hanyang University
• Original Assignee: Iucf-hyu
• Inventors: Kim, Seon Jeong, Shin, Min Kyoon, Kim, Shi Hyeong
• Application Number:
  US14/004,837
• Publication Number:
  US 20140011027A1
• Time in Patent Office: Days
• US Class Current: 428/367
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: D01D 1/02 Preparation of spinning solutions
• CPC Class Codes: D01D 10/02 Heat treatment heating for finishing D02J13/00
• CPC Class Codes: D01D 5/06 Wet spinning methods D01D5/0046 takes precedence
• CPC Class Codes: D01F 1/10 Other agents for modifying properties
• CPC Class Codes: D01F 11/14 with organic compounds, e.g. macromolecular compounds
• CPC Class Codes: D01F 6/14 from polymers of unsaturated alcohols, e.g. polyvinyl alcohol, or of their acetals or ketals
• CPC Class Codes: D01F 6/16 from polymers of unsaturated carboxylic acids or unsaturated organic esters, e.g. polyacrylic esters, polyvinyl acetate
• CPC Class Codes: D01F 9/12 Carbon filaments; Apparatus specially adapted for the manufacture thereof
• CPC Class Codes: D02J 13/00 Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass heating, cooling or drying during spinning or twisting D01H; drying of yarns or the like, in general F26B
• CPC Class Codes: Y10T 428/2918 including free carbon or carbide or therewith [not as steel]

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.

Claims

1. A graphene composite fiber comprising graphene and a polymer wherein the wrinkled structure of the graphene is maintained unchanged.

2. The graphene composite fiber according to claim 1, wherein the contents of the graphene and the polymer in the composite fiber are from 20 to 90% by weight and from 10 to 80% by weight, respectively.

3. The graphene composite fiber according to claim 1, wherein the length of the graphene in the composite fiber is from 100 to 1000 nm.

4. The graphene composite fiber according to claim 1, wherein the polymer is selected from polyvinyl alcohol and poly(methyl methacrylate).

5. The graphene composite fiber according to claim 1, wherein the graphene composite fiber is flexible.

6. The graphene composite fiber according to claim 1, wherein the graphene composite fiber is capable of being formed into knot and spring structures and being woven into a fabric.

7. The graphene composite fiber according to claim 1, wherein the composite fiber has a toughness of 1 to 5.5 MJ/m³.

8. The graphene composite fiber according to claim 1, wherein the composite fiber has a mechanical strength of 100 to 300 MPa.

9. The graphene composite fiber according to claim 1, wherein the composite fiber has a modulus of elasticity of 5 to 30 GPa.

10. The graphene composite fiber according to claim 1, wherein the composite fiber has a storage modulus of 1 to 10 GPa at 20 to 200°

C.

11. A method for producing a graphene composite fiber, the method comprising

a) dispersing graphene and a surfactant in a solvent to prepare a dispersion, and

b) incorporating the dispersion into a polymer solution, wet spinning the resulting solution, followed by drying to produce a fiber.

12. The method according to claim 11, further comprising c) annealing the fiber obtained in b) at a high temperature of 140 to 160°

C.

13. The method according to claim 11, further comprising c′

) dipping the fiber obtained in b) in methanol or acetone to improve the degree of crystallization of the fiber.

14. The method according to claim 11, wherein the graphene is chemically reduced graphene.

15. The method according to claim 11, wherein the graphene is chemically reduced graphene with acid functional groups.

16. The method according to claim 15, 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.

17. The method according to claim 11, wherein the surfactant is selected from sodium dodecyl benzene sulfonate (SDBS), sodium dodecyl sulfonate (SDS), Triton X-100, and cetyltrimethylammonium bromide (CTAB).