Chemical Modification Of Carbon Nanotubes And Preparation Of Polyurethane Composites

With their chemical inactivity, extremely mechanical strength and well electronic properties, carbon nanotubes (CNTs) are a one-dimension nanostructural materials. The huge molecular weight of CNTs leads to their indissoluble, which limits the research of their chemical character. However, after CNTs' structures are modified and produce some active functional groups on them, such as -OH, -COOH and so on, the organic chemical reactions between CNTs and some organic compound are feasible.In this work, we modified CNTs with amine group by reacting with 3-amino-1,2,4-triazole for the first time. Before this modification, the efficient methods for purification and shortening of multi-walled carbon nanotubes (MWNTs) have been investigated. TEM, Elementary analysis and FT-IR spectra indicated that the MWNTs were oxidized into carboxylic group(ν_C=O= 1705.3 cm^-1) and were shortened to about 500nm in length. Then the carboxyl-terminated MWNTs reacted with 3-amino-1,2,4-triazole with the aid of the condensation agent...