Graphene-based fiber and graphene-based carbon fiber and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-11655564-B2
Application number	US-201916506062-A
Country	US
Kind code	B2
Filing date	Jul 9, 2019
Priority date	Jul 10, 2018
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

Provided are a graphene-based fiber in which a liquid-crystalline aromatic compound is intercalated into a graphene-based material, a graphene-based carbon fiber obtained by carbonizing the graphene-based fiber, and a method of manufacturing the same.

First claim

The invention claimed is:

1. A method of manufacturing a graphene-based fiber, the method comprising:
a) mixing a first composition comprising a liquid-crystalline aromatic compound having an average molecular weight of 100 to 2,000 Da and a solvent, and a second composition comprising a graphene-based material and a solvent to prepare a blend mixture;
b) removing the solvent in the blend mixture;
c) melting the blend mixture by heating; and
d) spinning the blend mixture to obtain a graphene-based fiber, wherein the blend mixture comprises the graphene-based material and the liquid-crystalline aromatic compound at a weight ratio of 1:0.5 to 1:30, and 30 to 60% by weight of the graphene based-material, based on the total weight of the solid content of the blend mixture,
wherein the blend mixture is melt-spun to obtain the fiber.

2. The method of claim 1 , wherein the first composition comprises 0.01 to 80% by weight of the liquid-crystalline aromatic compound, based on the total weight of the first composition.

3. The method of claim 1 , wherein the liquid-crystalline aromatic compound is any one or a mixture of two or more selected from fluidized catalytic cracking-decant oil (FCC-DO), coal tar, and mesophase pitch.

4. A method of manufacturing a graphene-based carbon fiber, the method further comprising carbonizing the graphene-based fiber manufactured by the method of claim 1 .

5. The method of claim 4 , wherein the carbonization is performed at 800 to 3,000° C. under an inert gas atmosphere.

6. A graphene-based fiber in which a liquid-crystalline aromatic compound having an average molecular weight of 100 to 2,000 Da is intercalated into a graphene-based material, wherein the graphene-based material and the liquid-crystalline aromatic compound are coupled at a weight ratio of 1:0.5 to 1:30,
wherein the fiber is obtained by melt-spinning a blend mixture of the liquid-crystalline aromatic compound and the graphene-based material without a solvent, and
wherein the blend mixture comprises 30 to 60% by weight of the graphene-based material, based on the total weight of the solid content of the blend mixture.

7. The graphene-based fiber of claim 6 , wherein the fiber is in the form of layers in which the graphene-based material is oriented in a parallel direction with respect to the fiber axis, and the liquid-crystalline aromatic compound is positioned between the layers so that the liquid-crystalline aromatic compound is oriented in the parallel direction.

8. The graphene-based fiber of claim 6 , wherein the liquid-crystalline aromatic compound and the graphene-based material are intercalated via a π-π stacking bond.

Assignees

• Korea Advanced Inst Sci & Tech

Inventors

• Kim Sang Ouk
• Yun Taeyeong
• Kim In Ho
• Jung Hong Ju

Classifications

• D01F1/09 Primary

  for making electroconductive or anti-static filaments · CPC title

• D01D5/003

  the material being a polymer solution or dispersion (D01D5/0053 takes precedence) · CPC title

• D10B2401/16

  antistatic; conductive · CPC title

• D01F9/145 Primary

  from pitch or distillation residues · CPC title

• D01F9/00

  Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments · CPC title