Synthesis and characterization carboxyl functionalized Multi-Walled Carbon Nanotubes (MWCNT-COOH) and NH₂ functionalized Multi-Walled Carbon Nanotubes (MWCNTNH₂)

Abstract

A making of MWCNTs-COOH has been conducted to improve the compatibility of carbon nanotubes and MWCNTs-NH2, in order to have conductive properties. The MWCNTs- COOH study was performed, using the first reflux method using HNO3 for 6 hours heated with 60°C (concentrated HNO3 ratio with MWCNTs is 1: 5), followed by the second reflux using SOCl2 for 5 hours heated to 70°C (concentrated HNO3 ratio with MWCNTs is 1: 3). Meanwhile, the making of MWCNTs-NH2 used homogenization process, used magnetic stirrer, with comparison between MWCNTs-COOH with Etanadiamine 1: 2000, for 8 hours at 40oC. Both products were analyzed using Fourier transform infrared (FTIR), Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray Spectroscopy (EDS). The C-O bond on MWCNTs-COOH is indicated by absorption at wavelength 1672.28 cm-1 and O-H bond at 3431.36 cm-1 N-H bond on MWCNTs-NH2 shown at wavelength 1440.83. The SEM analysis indicates that both products have a tubular surface morphology.