METHOD FOR PREPARING CARBON NANOTUBE, AND DISPERSION COMPOSITION OF CARBON NANOTUBE

摘要

The present invention relates to a method for preparing carbon nanotubes which are capable of more effectively preparing carbon nanotubes having a uniform and fine size, and a dispersion composition of carbon nanotubes obtained using the same. The method for preparing carbon nanotube comprises the steps of: forming a dispersion comprising carbon nanotube bundles, a dispersant and a solvent; and enabling the dispersion to consecutively pass through a high pressure homogenizer, wherein the dispersant is a mixture of plural kinds of polyaromatic hydrocarbon oxides, and the carbon nanotube bundles are pulverized or disentangled while passing through a microchannel of the high pressure homogenizer under a shear force to form carbon nanotubes.

主权项

1. A method for preparing carbon nanotubes comprising the steps of: forming a dispersion comprising carbon nanotube bundles having a first length, a dispersant and a solvent; and
enabling the dispersion to consecutively pass through a high pressure homogenizer comprising an inlet, an outlet, and a microchannel for connecting the inlet and the outlet and having a micrometer scale diameter, wherein the dispersant is a mixture of plural kinds of poly-aromatic hydrocarbon oxides and includes a mixture containing polyaromatic hydrocarbon oxides having a molecular weight of 300 to 1000 in an amount of 60% by weight or more, and the carbon nanotube bundles having the first length are pulverized or disentangled while passing through the microchannel under the application of a shear force to form carbon nanotubes having a second length shorter than the first length.