Thermal Stability and Electrical Conductivity of Graphite Nanosheets/Polyaniline Composites

Composites of graphite nanosheets (GNS) fillers in a polyaniline (PANI) matrix doped with dodecylbenzene sulfonic acid were synthesized by polymerization with the aid of sonication. The resulting GNS/PANI composites were characterized by scanning and trans-mission electron microscopy, Fourier transform infrared spectroscopy, X-ray photo-electron spectroscopy, thermogravimetry and electrical conductivity. The results showed that the GNS play an important role in the improvement of thermal stability and electrical conductivity of the composites. Especially, followed the change of GNS contents of the composites, the results of the thermal stability analysis and electrical conductivity analysis got the same variation trend. When the GNS contents for PANI reached 5 wt% in the composites, the best thermal stability and the maximum value of electrical conductivity (6.48 S·cm-1) were obtained.