Synthesis and Characterization of the new polyaniline-sulfonated/polyaniline nanocomposite

Polyaniline (PANI) was another extensively studied conducting polymer which has high stability, good conductivity and reversible redox property. Sulfonated polyaniline (SPANI) has sulfonic groups on its backbones, so it is soluble in water [1]. SPANI has been used as the dopant for PANI and the resulting composite exhibited improved conductivity expansions [2, 3]. In this work novel nanocomposites comprising PANI/PMAS are prepared by the chemical oxidation of aniline in the presence of PMAS, and their physical properties characterized. The nanocomposites are found to possess novel properties, with conductivities higher than when an insulating or nonelectroactive material is used as the molecular dopant. UV-Visible spectroscopy and FTIR spectroscopy were used to investigate the analytical and functional groups present in the synthesized nanocomposites. The UV-vis spectrum of PANI/PMAS nanocomposite displayed the characteristic absorption peak of π-π* transition of the benzenoid ring at 348 nm. The oxidation state of PANI/PMAS nanocomposite was identified with FT-IR spectroscopy by comparing the two bands at 1580 (ring stretching in quinoid unit) and 1499 cm−1 (ring stretching in bezenoid unit).