SINGLE WALL CARBON NANOTUBE WITH DETERGENT-COATED SURFACE AND PROCESS FOR PREPARING THE SAME

摘要

Carbon nanotubes that can be dispersed into an aqueous solution without reagglomeration phenomenon are provided, and a method for preparing the carbon nanotubes is provided. A method for preparing surfactant-coated carbon nanotubes comprises the processes of: (i) mixing carbon nanotubes and a surfactant at a ratio of 1:2 to 2:5(w/w), and removing oxygen from the mixture to obtain a mixture; (ii) mixing the obtained mixture with oxygen-free water at a ratio of 0.7:100 to 0.8:100(v/v), and supersonically treating the mixture with a frequency of 15 to 20 kHz for 1 to 1.5 hour to disperse the carbon nanotubes into the mixed solution to obtain a dispersion; and (iii) treating the obtained dispersion with an initiator at a molar ratio of 1 to 5% relative to the amount of the surfactant, and coating the surfactant on surfaces of the carbon nanotubes while stirring the initiator-treated dispersion at 55 to 65 deg.C for 12 to 24 hours. The carbon nanotubes are single wall carbon nanotubes(SWNT). The surfactant is cetyltrimethyl ammonium 4-vinylbenzoate(CTVB). The initiator is 2,2'-azobis[2-(2-imidazolin-2-yl)propane]dihydrochloride. The method further comprises the process of centrifuging 100,000 g to 150,000 g of a reactant for 3 to 5 hours, and obtaining a supernatant from the centrifuged reactant to dry the supernatant after performing the process (iii).