Abstract

Hasan Tahermansouri¹, Davood Chobfrosh Khoei² and Masoumehmeskinfam³

In this paper, we have reported a highly efficient approach to functionalize carboxylated multi-walled carbon nanotubes (MWNT-COOH) by 2-aminophenole under microwave irradiation. Reducing the reaction time to the order of minutes and the number of steps in the reaction procedure is the major advantage of this procedure respect to conventional functionalization methods. These functionalizations involve amidation and cycloaddition reactions, respectively. The amidation was completed in one step as in the conventional methods, an additional step that is acid chloride formation was eliminated here. The cycloaddition of modified-MWNTs with phosphoryl trichloride to producing MWNT-benzoxazole was carried out in 30 min under microwave conditions, and the results were similar to what was achieved in 4 days using conventional methods. The interesting point is that modified MWNT can be homogeneously dispersed in DMF without sonication and the dispersed MWNT does not sediment in 3 month. The resulting nanotubes were characterized by FT-IR spectroscopy, Thermogravimetric analysis, Raman spectroscopy, Scanning electron microscopy and Elemental analysis.

Microwave; Functionalization; 2-aminophenole; Multi-wall nanotubes

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