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To improve the CNT's dispersion, we tried to chemically modify the surface of MWNT with the butyllithium and the hexyllithium solution in sonicated reactor. The functionalized-MWNTs were characterized by Fourier transform infrared spectrometer(FT-IR) and Raman spectrophotometer. Also, we investigated the amount of alkyl moiety incorporated into MWNT's surface with Thermal gravimetric analyzer(TGA) and dispersibility in various organic solvents. Finally, we could find organic content was about 5% of the functionalized MWNT and dispersibility was enhanced in some solvents having intermediate solubility parameter. Key Words : Carbon Nnotube, Dispersibility, Butyllithium Solution, Hexyllithium Solution    2008      2009 (RTI04-01-02)  . *  : (bunam@kut.ac.kr) 10 05 12  10 06 03  10 07 06 1.  (carbon nanotube, CNT) 1991 Iljima S.    [1],  (single-walled nanotube, SWNT),  (double-walled carbon nanotube),  (multi-walled carbon nanotube, MWNT),  (rope carbon nanotube)  CNT        .[2]    ,   ,              , , ,      .[3-7],  CNT     ,    van der Waals        ,     CNT    ,      ,      . CNT   CNT           [8]. CNT

Dispersibility of multi-walled carbon nanotubes functionalized with butyl and hexyl group