Oxidized carbon nanotube assembly, dispersion liquid using same, and method of producing oxidized carbon nanotube assembly
AssigneeZeon Corporation
InventorsArinobu KATADA, Hirokazu TAKAI
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Abstract
Provided is an oxidized carbon nanotube assembly having excellent dispersibility in a polar solvent. The oxidized carbon nanotube assembly includes oxidized single-walled carbon nanotubes, has a ratio of the number of oxidized single-walled carbon nanotubes relative to the total number of oxidized carbon nanotubes in the oxidized carbon nanotube assembly of 51% or more, and has a heat of immersion per unit area in water of not less than 1,500 mJ/m2 and not more than 10,000 mJ/m2.
Claims6
An oxidized carbon nanotube assembly comprising oxidized single-walled carbon nanotubes, wherein
- a ratio of a number of the oxidized single-walled carbon nanotubes relative to a total number of oxidized carbon nanotubes in the oxidized carbon nanotube assembly is 51% or more, and
- heat of immersion per unit area of the oxidized carbon nanotube assembly in water is not less than 1,500 mJ/m2 and not more than 10,000 mJ/m2.
A method of producing an oxidized carbon nanotube assembly comprising:
- performing heat treatment of a carbon nanotube assembly including single-walled carbon nanotubes in an oxygen-containing atmosphere at higher than 550° C. to obtain a pre-oxidation carbon nanotube assembly;
- and
- performing acid treatment of the pre-oxidation carbon nanotube assembly to obtain an oxidized carbon nanotube assembly.
Dependencies are inferred from the claim text.