Preparation and characterization of nanocomposite based on polyaniline and graphene nanosheets

Division of Advanced Materials Science Engineering, Hanyang University, 133-791, Seoul, Korea
Macromolecular Research (Impact Factor: 1.68). 07/2011; 19(2):203-208. DOI: 10.1007/s13233-011-0216-2

ABSTRACT Polymer nanocomposites based on polyaniline (PANi) and graphene nanosheets (GNS) modified with poly(sodium 4-styrensulfonate) (PSS-GNS) were prepared, and their structure and properties were investigated by atomic force microscopy (AFM), scanning electron microscopy (SEM), UV-vis spectroscopy, ATR-IR spectros-copy, X-ray diffraction, elemental analysis, thermogravimetric analysis (TGA) and electrical conductivity measure-ments. The results revealed that for the PANi/PSS-GNS nanocomposites, the disordered structure of PSS-GNS was fully destroyed and PSS-GNS exists in the form of a single GNS or stacked PSS-GNS elements in a PANi matrix. PSS-GNS was partly covered by PANi due to hydrogen bonding that occurs between the PSS-GNS and PANi. By incorporating PSS-GNS, the electrical conductivity of PANi increased linearly from 0.84 S/cm for neat PANi to 4.96 S/cm for a PANi/PSS-GNS (5%) nanocomposite. The thermal stability of the PANi was also improved significantly to approximately 100 o C by the nanocomposite.

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