Carbon nanotube fibers/filaments formulated from metal nanoparticle catalyst and carbon source

Patent metadata

Field	Value
Publication number	US-9255003-B2
Application number	US-201213525620-A
Country	US
Kind code	B2
Filing date	Jun 18, 2012
Priority date	Dec 22, 2004
Publication date	Feb 9, 2016
Grant date	Feb 9, 2016

Abstract

Disclosed is a method of: providing a mixture of a polymer or a resin and a transition metal compound, producing a fiber from the mixture, and heating the fiber under conditions effective to form a carbon nanotube-containing carbonaceous fiber. The polymer or resin is an aromatic polymer or a precursor thereof and the mixture is a neat mixture or is combined with a solvent. Also disclosed are a carbonaceous fiber or carbonaceous nanofiber sheet having at least 15 wt. % carbon nanotubes, a fiber or nanofiber sheet having the a polymer or a resin and the transition metal compound, and a fiber or nanofiber sheet having an aromatic polymer and metal nanoparticles.

First claim

What is claimed is:

1. A method comprising:
providing a polymer or resin that is an aromatic polymer or a precursor thereof;
providing an amount of a transition metal compound;
dissolving the polymer or resin and the amount of the transition metal compound in a solvent to produce a solution;
producing a fiber from the solution; and
heating the fiber under conditions effective to form a carbon nanotube-containing fiber.

2. The method of claim 1 , wherein the solvent is a polar aprotic solvent.

3. The method of claim 1 , wherein the carbon nanotubes are formed by heating the fiber in an inert atmosphere to a temperature of 600-2700° C.

4. The method of claim 1 , further comprising:
heating the fiber under conditions effective to convert the precursor to the aromatic polymer before heating to form the carbon nanotube-containing fiber.

5. The method of claim 4 , wherein the precursor is polyacrylonitrile.

6. The method of claim 4 , wherein the resin is a coal pitch polymer, a petroleum pitch polymer, or a pitch resin polymer.

7. The method of claim 4 , wherein the precursor or resin is converted to the aromatic polymer by heating in the presence of oxygen to a temperature of 200-300° C.

8. The method of claim 1 , wherein the aromatic polymer is a phthalonitrile polymer or thermoset thereof.

9. The method of claim 8 , wherein the phthalonitrile polymer is formed from

wherein n is a positive integer.

10. The method of claim 1 , wherein the transition metal compound is octacarbonyldicobalt, 1-(ferrocenylethynyl)-3-(phenylethynyl)benzene, diironnonacarbonyl, or bis(1,5-cyclooctodiene)nickel(0).

11. The method of claim 1 , wherein the fiber is formed using a spinneret.

12. The method of claim 1 , wherein the fiber is formed by electrospinning.

13. The method of claim 1 , wherein the fiber is a component of a nanofiber sheet.

14. The method of claim 1 , wherein the fiber is produced when at least 50% of the amount of the transition metal compound remains in the solution.

Assignees

• Keller Teddy M
• Laskoski Matthew
• Us Navy

Inventors

• Keller Teddy M
• Laskoski Matthew

Classifications

• D01F9/12 Primary

  Carbon filaments; Apparatus specially adapted for the manufacture thereof · CPC title

• D04H1/4242

  Carbon fibres · CPC title

• D01F9/14

  by decomposition of organic filaments · CPC title

• D01F9/127

  by thermal decomposition of hydrocarbon gases or vapours {or other carbon-containing compounds in the form of gas or vapour, e.g. carbon monoxide, alcohols} · CPC title

• D01F1/02

  Addition of substances to the spinning solution or to the melt (addition of substances to viscose D01F2/08) · CPC title