-In this work, a dispersion study of carbon nanotubes (CNTs) functionalized with carboxylic and alkanes groups in various solvents are performed. CNT was treated using H 2 SO 4 /HNO 3 , and functionalized subsequently by dodecylamine (DDA). The surface modification was confirmed by Fourier transform infrared and X-ray photoelectron spectroscopy. The thermal stabilities were studied by Thermogravimetric analysis. The dispersion state of CNTs in the solvents was based on visual observations. Evaluation of the solvent influence by itself was also made. Results confirmed the presence of oxygencontaining and alkanes groups on CNTs surfaces. Dispersion stability was strongly dependent on solvent and carbon nanotubes surface interactions, which can vary with the chemical nature of the solvent. The study of dispersion stability of the nanotubes with different solvents is relevant to the full understanding of its applications.