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AssigneeNational Institute of Advanced Industrial Science and Technology
InventorsYouichi Sakakibara, Madoka Tokumoto, Oleksiy Rozhin, Hiromichi Kataura
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In the present invention, a nonionic surfactant is noticed for a function of dispersing a carbon nanotube, and it is found that a mixture solution of an amide-based organic solvent and a polyvinylpyrrolidone (PVP) or of the amide-based organic solvent, the nonionic surfactant, and the polyvinylpyrrolidone (PVP) has an excellent function as a dispersant for the carbon nanotube. Ultrasonication is required for dispersing a carbon nanotube in the dispersant. The ultrasonication may be carried out in the step of dispersing the carbon nanotube in the nonionic surfactant and/or the amide-based polar organic solvent, and then the polyvinylpyrrolidone (PVP) may be mixed with the resultant dispersion. Alternatively, a mixture solution of the nonionic surfactant and/or the amide-based polar organic solvent, and the polyvinylpyrrolidone (PVP) is prepared, and then the ultrasonication may be carried out in the step of dispersing the carbon nanotube therein.
A non-aqueous carbon nanotube dispersion liquid consisting of a carbon nanotube, an amide-based polar organic solvent, and a polyvinylpyrrolidone (PVP).
A non-aqueous carbon nanotube dispersion liquid consisting of a carbon nanotube, an amide-based polar organic solvent, a nonionic surfactant, and a polyvinylpyrrolidone (PVP).
A method for producing a non-aqueous carbon nanotube dispersion liquid, comprising the step of mixing and dispersing a carbon nanotube in a mixture solution of an amide-based polar organic solvent and a polyvinylpyrrolidone (PVP) under ultrasonication.
A method for producing a non-aqueous carbon nanotube dispersion, comprising the steps of mixing and dispersing a carbon nanotube in a mixture solution of an amide-based polar organic solvent and a nonionic surfactant under ultrasonication, and mixing the resultant dispersion with a polyvinylpyrrolidone (PVP).
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