Effect of microwave absorption study on polyaniline nanocomposites with untreated and treated double wall carbon nanotubes
Document Type
Article
Publication Date
1-1-2016
Abstract
Hexanoic acid (HA) doped polyaniline (PAni) nanocomposites which consist of different contents of untreated double wall carbon nanotubes (u-DWNT) and carboxyl treated DWNT (c-DWNT) with titanium dioxide nanoparticles were successfully prepared using template-free method. Fourier transform infrared, ultraviolet-visible and X-ray diffractometer spectra clearly confirmed the chemical structure of PAni nanocomposites. Thermal stability, morphology, conductivity, magnetic properties and reflection loss of PAni nanocomposites were characterized by thermogravimetric analyzer, field emission scanning electron microscope, four-point probe, vibrating sample magnetometer and microwave vector network analyzer, respectively. From this study, it is shown that electrical conductivity of PAni nanocomposites with u-DWNT possessed higher conductivity (1.23 × 10–1 to 1.31 × 100 S/cm) compared to c-DWNT (3.43 × 10–2 to 4.48 × 10–1S/cm). PAni/HA/TiO2/DWNT nanocomposites with 20% of c-DWNT have been covered by PAni layers to form the highest amount of nanorods/nanotubes. Hence, it shows high heterogeneity that will enhance the dielectric permittivity and contribute to a more disordered motion of charge carriers along the PAni backbone. Therefore, it will eventually contribute to good microwave absorption and potentially apply as an efficient electromagnetic interference shielding material in cell phones.
Keywords
Double wall carbon nanotube, Electromagnetic interference shielding materials, Field emission scanning electron microscopes, Fourier transform infra reds, Polyaniline nanocomposites, Thermogravimetric analyzers, Titanium dioxide nanoparticles, Vibrating sample magnetometer
Divisions
CHEMISTRY
Publication Title
Polymer Composites
Volume
39
Issue
4
Publisher
Wiley
Additional Information
Koh, Yen Nee & Mokhtar, Nurrafiqah. Faculty of Science, Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia.