Electrical Properties of Polyaniline/Functionalized Multi Walled Carbon Nanotubes Nanocomposite

Abstract

Conducting polyaniline (PANI) nanocomposites containing various concentrations of carboxylic acid functionalized multi-walled carbon nanotubes (f-MWCNT) were synthesized by in situ polymerization of aniline monomer. The morphological, structural and electrical properties of pure PANI and MWCNT–PANI nanocomposites were studied by using Fourier transform- infrared spectroscopy (FT–IR), X-ray Diffraction(XRD)and an ac computerized sensitive impedance analyzer type, respectively. FTIR spectra indicates that the carboxylic acid groups formed at the both ends of the sidewalls of the MWCNTs. The aniline monomers were polymerized on the surface of MWCNTs, depending on the -* electron interaction between aniline monomers and MWCNTs and hydrogen bonding into interaction between the amino groups of aniline monomers and carboxylic acid group of f-MWCNT. XRD result shows that CNTs were well dispersed in polymer matrix. The electrical conductivity of the PANI-MWCNT nanocomposites was higher than pure-PANI increased by increasing the amount of MWCNT to the nanocomposite