Carbon nanotube manufacturing method

• US 9,527,737 B2
• Filed: 03/08/2012
• Issued: 12/27/2016
• Est. Priority Date: 03/08/2011
• Status: Active Grant

• Current Assignee: Nagoya University
• Original Assignee: Nagoya University
• Inventors: Kitaura, Ryo, Itami, Kenichiro, Segawa, Yasutomo, Shinohara, Hisanori
• Primary Examiner(s): MCCRACKEN, DANIEL
• Application Number:
  US14/003,289
• Publication Number:
  US 20140030183A1
• Time in Patent Office: 1,755 Days
• Field of Search: 4234471-4473, 423/445.B, 977742-754, 977842-848
• US Class Current: 1/1
• 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 2202/02 Single-walled nanotubes
• CPC Class Codes: C01B 32/16 Preparation
• CPC Class Codes: Y10S 977/75 Single-walled
• CPC Class Codes: Y10S 977/843 Gas phase catalytic growth, i.e. chemical vapor deposition

Abstract

Carbon nanotubes (CNTs) having a desired diameter are selectively produced by reacting a carbon source with a cyclic compound in which multiple aromatic rings are continuously bonded. The reaction is preferably performed by supplying a gaseous carbon source under reduced pressure and heating. The cyclic compound in which multiple aromatic rings are continuously bonded is preferably a cyclic compound in which bivalent aromatic hydrocarbon groups are continuously bonded, or a modified cycloparaphenylene compound in which a cycloparaphenylene compound or at least one phenylene group of the cycloparaphenylene compound is substituted with a condensed cyclic group such as a naphthylene group.

Claims

1. A method for producing a carbon nanotube, comprising:

reacting a carbon source with a cyclic compound in which multiple aromatic rings are continuously bonded, in the absence of a catalyst,

wherein the carbon source is at least one member selected from the group consisting of hydrocarbon compounds, alcohol compounds, ether compounds and ester compounds, and

the cyclic compound in which multiple aromatic rings are continuously bonded is a cycloparaphenylene compound represented by Formula (1);

2. The method according to claim 1, wherein the reaction is performed by supplying a gaseous carbon source under reduced pressure and heating.

3. The method according to claim 1, wherein the cycloparaphenylene compound is a compound represented by Formula (1) wherein a is an integer of 6 to 100.

4. The method according to claim 1,

the cyclic compound in which multiple aromatic rings are continuously bonded is the cycloparaphenylene compound represented by Formula (1).

5. The method according to claim 1, wherein the cyclic compound in which multiple aromatic rings are continuously bonded is a cyclic compound represented by Formula (3):

6. The method according to claim 1, wherein the reaction is performed by supplying a gaseous carbon source under a pressure of 10⁻

4 to 10⁵ Pa with heating at 400 to 1200°

C.