Dispersed solution of carbon nanotubes and method of preparing the same
First Claim
1. A dispersed solution of carbon nanotubes, comprising:
- carbon nanotubes;
an organic solvent;
a spacer; and
a dispersant,wherein the dispersant is a compound comprising;
a head moiety comprising a substituted or unsubstituted C5 to C30 aromatic hydrocarbon group or a substituted or unsubstituted C3 to C30 heterocyclic aromatic group; and
a tail moiety comprising a repeat unit selected from the group consisting of an acrylate group, an ethylene oxide group, a propylene oxide group, and an alkyl group, wherein the head moiety and the tail moiety are connected to each other, and the molecular weight of the dispersant is less than or equal to about 20,000, wherein the dispersant is a compound represented by Formulae 9 through 11;
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Abstract
Disclosed herein are a dispersed solution of carbon nanotubes including carbon nanotubes, an organic solvent, a spacer, and a dispersant, and a method of preparing the same. The dispersed solution of the carbon nanotubes includes both the spacer, which reduces the van der Waals force of the carbon nanotubes and prevents bundling of the carbon nanotubes, and the dispersant, which maintains the debundling and stability of the carbon nanotubes, thereby improving the dispersibility of the carbon nanotubes. The method of preparing the dispersed solution of the carbon nanotubes can easily produce a dispersed solution of carbon nanotubes without performing a separate chemical treatment.
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Citations
18 Claims
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1. A dispersed solution of carbon nanotubes, comprising:
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carbon nanotubes; an organic solvent; a spacer; and a dispersant, wherein the dispersant is a compound comprising; a head moiety comprising a substituted or unsubstituted C5 to C30 aromatic hydrocarbon group or a substituted or unsubstituted C3 to C30 heterocyclic aromatic group; and a tail moiety comprising a repeat unit selected from the group consisting of an acrylate group, an ethylene oxide group, a propylene oxide group, and an alkyl group, wherein the head moiety and the tail moiety are connected to each other, and the molecular weight of the dispersant is less than or equal to about 20,000, wherein the dispersant is a compound represented by Formulae 9 through 11; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of preparing a dispersed solution of carbon nanotubes, the method comprising:
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inserting a spacer between carbon nanotubes; and dispersing the carbon nanotubes using a dispersant and an organic solvent, wherein the dispersant is a compound comprising; a head moiety comprising a substituted or unsubstituted C5 to C30 aromatic hydrocarbon group or a substituted or unsubstituted C3 to C30 heterocyclic aromatic group; and a tail moiety comprising a repeat unit selected from the group consisting of an acrylate group, an ethylene oxide group, a propylene oxide group, and an alkyl group, wherein the head moiety and the tail moiety are connected to each other, and the molecular weight of the dispersant is less than or equal to about 20,000, wherein the dispersant is a compound represented by Formulae 9 through 11; - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method of preparing a dispersed solution of carbon nanotubes, the method comprising:
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adding carbon nanotubes to a solution containing a spacer to prepare a first carbon nanotube solution; sonicating the first carbon nanotube solution; adding a dispersant and an organic solvent to the sonicated first carbon nanotube solution to prepare a second carbon nanotube solution; sonicating the second carbon nanotube solution; centrifuging the sonicated second carbon nanotube solution; and recovering a dispersed solution of the carbon nanotubes which are dispersed in the centrifuged second carbon nanotube solution, wherein the dispersant is a compound comprising; a head moiety comprising a substituted or unsubstituted C5 to C30 aromatic hydrocarbon group or a substituted or unsubstituted C3 to C30 heterocyclic aromatic group; and a tail moiety comprising a repeat unit selected from the group consisting of an acrylate group, an ethylene oxide group, a propylene oxide group, and an alkyl group, wherein the head moiety and the tail moiety are connected to each other, and the molecular weight of the dispersant is less than or equal to about 20,000, wherein the dispersant is a compound represented by Formulae 9 through 11;
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18. A method of preparing a dispersed solution of carbon nanotubes, the method comprising:
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adding carbon nanotubes to a solution containing a spacer, an organic solvent and a dispersant to prepare a carbon nanotube solution; sonicating the carbon nanotube solution; centrifuging the sonicated carbon nanotube solution; and recovering a dispersed solution of the carbon nanotubes which are dispersed in the centrifuged carbon nanotube solution, wherein the dispersant is a compound comprising; a head moiety comprising a substituted or unsubstituted C5 to C30 aromatic hydrocarbon group or a substituted or unsubstituted C3 to C30 heterocyclic aromatic group; and a tail moiety comprising a repeat unit selected from the group consisting of an acrylate group, an ethylene oxide group, a propylene oxide group, and an alkyl group, wherein the head moiety and the tail moiety are connected to each other, and the molecular weight of the dispersant is less than or equal to about 20,000, wherein the dispersant is a compound represented by Formulae 9 through 11;
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Specification