Graphene composite nanofiber and preparation method thereof

• US 8,519,045 B2
• Filed: 02/25/2010
• Issued: 08/27/2013
• Est. Priority Date: 03/03/2009
• Status: Expired due to Fees

• Current Assignee: Korea Advanced Institute of Science and Technology
• Original Assignee: Korea Advanced Institute of Science and Technology
• Inventors: Jang, Sung-Yeon, Jo, Seong Mu, Kim, Dong Young, Lee, Sang Yup, Park, Tae Jung, Park, Ho Seok, Hong, Won Hi, Choi, Bong Gill
• Primary Examiner(s): Choi, Ling
• Assistant Examiner(s): REUTHER, ARRIE L
• Application Number:
  US12/712,653
• Publication Number:
  US 20100317790A1
• Time in Patent Office: 1,279 Days
• Field of Search: 524/496
• US Class Current: 524/496
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: B82Y 40/00 Manufacture or treatment of nanostructures
• CPC Class Codes: C01B 32/194 After-treatment
• CPC Class Codes: C01B 32/23 Oxidation
• CPC Class Codes: D01D 5/0069 characterised by the spinning section, e.g. capillary tube, protrusion or pin
• CPC Class Codes: D01D 5/0076 characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid D01D5/0046 takes precedence
• CPC Class Codes: D01D 5/14 with flowing liquid or gaseous stretching media , e.g. solution-blowing
• CPC Class Codes: D01F 1/10 Other agents for modifying properties
• CPC Class Codes: D01F 9/14 by decomposition of organic filaments

Abstract

Disclosed are a graphene composite nanofiber and a preparation method thereof. The graphene composite nanofiber is produced by dispersing graphenes to at least one of a surface and inside of a polymer nanofiber or a carbon nanofiber having a diameter of 1˜1000 nm, and the graphenes include at least one type of monolayer graphenes, and multilayer graphenes having a thickness of 10 nm or less. The graphene composite nanofiber can be applied to various industrial fields, e.g., a light emitting display, a micro resonator, a transistor, a sensor, a transparent electrode, a fuel cell, a solar cell, a secondary cell, and a composite material, owing to a unique structure and property of graphene.

Claims

1. A graphene composite nanofiber in which graphenes are dispersed to at least one of a surface and inside of a polymer nanofiber or a carbon nanofiber having a diameter of 1˜

1000 nm,

wherein the graphenes comprise one selected from monolayer graphenes, multilayer graphenes having a thickness of 10 nm or less, and a combination thereof;

wherein

i) 90% of the graphenes are present as monolayer graphenes;

ii) the graphenes are graphene oxides or reduced form of the graphene oxides; and

iii) the composite nanofiber has no entangled fibers or graphite lumps.

2. The graphene composite nanofiber of claim 1, wherein the graphenes are oriented parallel to an axis of the polymer nanofiber or the carbon nanofiber.

3. The graphene composite nanofiber of claim 1, wherein the polymer nanofiber or the carbon nanofiber having the graphenes dispersed therein is produced by electrospinning a solution containing graphenes and polymers.