Synthesis and characterization of polyaniline-polystyrene-chitosan/zinc oxide hybrid nanocomposite

Document Type: Research Article

Author

Payame Noor University

Abstract

A hybrid nanocomposite composed of polyaniline-polystyrene-chitosan/zinc oxide was prepared via simple in situ polymerization method. The synthesized copolymers were analyzed by means of Fourier transform infrared (FTIR), and ultraviolet-visible (UV–vis) spectroscopies, thermogravimetric analysis (TGA), and field emission scanning electron microscopy (FE-SEM), X-ray diffraction, energy dispersive, X-ray photoelectron spectroscopy, and cyclic voltammetry. The chemical bonding established between polyaniline-polystyrene and polyaniline-polystyrene-chitosan/zinc oxide, confirmed by FT-IR, is likely to be responsible for the enhanced chemical stability. From SEM observation, the ratio of ZnO nanoparticles to nanocomposite altered the morphology of the hybrids from granular to plate like structure, which was confirmed by EDXS. Thermal property was studied using TG/DTA analysis shows the residual weight (TGA curves) and its weight derivative (DTA curves) of the polyaniline-polystyrene-chitosan/zinc oxide are more stable than chitosan and polyaniline-polystyrene-chitosan. In addition, the cyclic voltammetry on the obtained hybrid materials revealed that the plate-like structure was more advantages for the electrochemical stability. Overall, the results show that the introduction of the ZnO nanoparticles into polyaniline-polystyrene-chitosan matrix enhanced the thermal and electrode stability

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