Polymer-graphene liquid crystal fiber and a carbon fiber produced by the same and method for manufacturing the same
AssigneeKorea Advanced Institute of Science and Technology
InventorsSang Ouk Kim, In Ho Kim
Life of this patent
Estimating the term…
Abstract
Provided is a manufacturing method of a graphene-based liquid crystal fiber including: polymerizing a first aromatic monomer on a graphene-based compound to prepare a graphene composite in which a first aromatic polymer is surface-polymerized on the graphene-based compound; wet-spinning the graphene composite to manufacture a hydrogel fiber; and polymerizing a second aromatic monomer on the hydrogel fiber to fill pores of the hydrogel fiber with a second aromatic polymer.
Claims14
A manufacturing method of a graphene-based liquid crystal fiber comprising:
- (a) polymerizing a first aromatic monomer on a graphene-based compound to prepare a graphene composite in which a first aromatic polymer is surface-polymerized on the graphene-based compound;
- (b) wet-spinning the graphene composite to manufacture a hydrogel fiber;
- and
- (c) polymerizing a second aromatic monomer on the hydrogel fiber to fill pores of the hydrogel fiber with a second aromatic polymer,
- wherein the pores of the hydrogel fiber are filled by immersing, at 10° C. to 50° C. for 1 hour to 5 hours, the hydrogel fiber in a solution in which the second aromatic monomer is dissolved.
A manufacturing method of a graphene-based carbon fiber, comprising:
- (a) polymerizing a first aromatic monomer on a graphene-based compound to prepare a graphene composite in which a first aromatic polymer is surface-polymerized on the graphene-based compound;
- (b) wet-spinning the graphene composite to manufacture a hydrogel fiber;
- and
- (c) filling pores of the hydrogel fiber with a second aromatic polymer to manufacture a graphene-based liquid crystal fiber;
- and
- (d) carbonizing the graphene-based liquid crystal fiber,
- wherein the pores of the hydrogel fiber are filled by immersing, at 10° C. to 50° C. for 1 hour to 5 hours, the hydrogel fiber in a solution in which the second aromatic monomer is dissolved.
A graphene-based liquid crystal fiber comprising:
- a hydrogel fiber comprising a graphene-based compound modified with a first aromatic polymer and a second aromatic polymer filled in pores of the hydrogel fiber,
- wherein ID/IG of the graphene-based compound and the graphene-based compound modified with the first aromatic polymer satisfies the following Equation 1:
- (ID/IG)G/(ID/IG)C>1 [Equation 1]
- wherein ID/IG is a measure of relative crystallinity which represents density of defects, and is calculated as a ratio of a maximum intensity value of a peak of an absorption region at 1350±10 cm−1 (ID) to a maximum intensity value of a peak of an absorption region at 1590±10 cm−1 (IG), in Raman spectroscopic analysis, (ID/IG)G refers to ID/IG of the graphene-based compound, and (ID/IG)C refers to ID/IG of a graphene composite modified with the first aromatic polymer, and
- wherein (ID/IG)C of the graphene composite modified with the first aromatic polymer is 1 or less.
A graphene-based carbon fiber comprising a graphene-based compound and graphitic nitrogen, having an electrical conductivity of 1×105 S/m or more and 1×106 S/m or less, wherein an inside of the graphene-based carbon fiber is formed of a dense texture which substantially does not include pores.
Dependencies are inferred from the claim text.