Method for shortening fibrous carbon nanohorn aggregate and shortened fibrous carbon nanohorn aggregate
AssigneeNEC Corporation
InventorRyota YUGE
Life of this patent
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Abstract
Provided is a shortened fibrous carbon nanohorn aggregate (CNB) obtained by shortening a CNB having a length of 1 μm or more and a diameter in the short direction in the range of 30 to 100 nm, by oxidizing, stirring in an acid solution, subjecting to an ultrasonic treatment in a liquid, followed by cutting. The shortened CNB has an end surface on which no tip of the plurality of single-walled carbon nanohorns is disposed toward the longitudinal direction at least one end in the longitudinal direction, and has an excellent dispersibility by shortening the length to less than 1 μm.
Claims20
A method of shortening a fibrous carbon nanohorn aggregate comprising:
- (1) oxidizing a fibrous carbon nanohorn aggregate in which a plurality of single-walled carbon nanohorns are aggregated radially and are connected in a fibrous manner, the fibrous carbon nanohorn aggregate having a length of 1 μm or more and a diameter in the transverse direction in the range of 30 to 100 nm;
- (2) agitating the fibrous carbon nanohorn aggregate in an acid solution;
- and
- (3) subjecting the fibrous carbon nanohorn aggregate to ultrasonic treatment in a liquid after the step (2).
A fibrous carbon nanohorn aggregate in which a plurality of single-walled carbon nanohorns are assembled radially and connected in a fibrous manner, wherein the fibrous carbon nanohorn aggregate has a diameter in the transverse direction in the range of 30 to 100 nm, and at least one end in the longitudinal direction of the fibrous carbon nanohorn aggregate has an end surface on which no tip of the plurality of single-walled carbon nanohorns is disposed toward the longitudinal direction.
A fibrous carbon nanohorn aggregate in which a plurality of single-walled carbon nanohorns are assembled radially and are connected in a fibrous manner, wherein the fibrous carbon nanohorn aggregate has a length less than 1 μm, and at least one end of the fibrous carbon nanohorn aggregate in the longitudinal direction has an end face of a two-dimensional radial structure in which the plurality of single-walled carbon nanohorns are not arranged toward the longitudinal direction.
Dependencies are inferred from the claim text.