Functionalization of Carboxylated Multi-Walled Carbon Nanotubes With 1, 4-Phenylendiamine, Phenylisocyanate and Phenylisothiocyanate

We reported a noticeable methodology for functionalization of carboxylated multi-walled carbon nanotubes (MWNT-COOH) using 1, 4-phenylendiamine and the latter modification by phenylisocyanate and phenylisothiocyanate. All products were characterized by FT-IR and Raman spectroscopy, SEM, elemental analysis and 1H NMR spectrum. The 1H NMR spectrum of products confirmed formation of MWNT-amide, MWNT-urea and MWNT-thiourea. Functionalization of NH2, NHCO, NHCS and NCO groups is very important due to increasing the MWNT solubility and creating active sites for further reactions.