Polyaniline nanocomposites encapsulating gold nanoparticles on camphor sulfonic acid (CSA) surface were prepared via the polymerization of aniline hydrochloride with different concentrations of CSA using HAuCl4 as oxidant. The synthesized composites were characterized by Fourier transform infrared spectroscopy and UV–visible spectroscopy. Surface morphology was studied by scanning electron microscopy and transmission electron microscopy. The embedded crystallinity of the composites was investigated by X‐ray diffraction analysis. The solubility of the nanocomposites was studied using water, N‐methyl‐2‐pyrrolidinone, chloroform, and dimethylformamide solvents. The room temperature direct current conductivity of the composites was also observed in solution state. Electrical property of the composites was examined using cyclic voltammetric measurements at room temperature. The fabricated polymer nanocomposites with better solubility in water and some organic solvents will have various applications in electrical devices and biosensors. POLYM. COMPOS., 36:245–252, 2015. © 2014 Society of Plastics Engineers

Polypyrrole (PPy) nanocomposites with iron nanoparticles attached to 2-acrylamido-2-methyl-1-propanesulfonic acid (AMP) were chemically prepared by varying the concentration of AMP using ammonium persulfate as an oxidant. The synthesized composites were characterized by using Fourier transform infrared (FTIR) spectroscopy, and their surface morphology and amended crystallinity were determined by using the transmission electron microscopy (TEM) and X-ray diffraction (XRD), respectively. The electrical and magnetic properties of PPy-Fe-AMP composites were investigated at room temperature. The increase of AMP has brought out a significant increase of DC conductivity and magnetic saturation moment of the composites, which might have been caused by the increased mobility of charge carriers due to the hydrophilic AMP components. POLYM. COMPOS., 35:364-371, 2014.

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Polyaniline (PANI) nanocomposites containing different weight percentages of graphene (GR) are chemically prepared in the presence of b-naphthalene sulfonic acid (NSA) and characterized using attenuated total reflectance Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. The characterization results suggest that the composites are formed via the interconnected fibrillar structure forming the semi-crystalline/amorphous configuration by the bnapthalene sulfonic acid (b-NSA). The conductivities of the composites suggest that the composites undergo by two different regions of I and II before and after 378 K. The electrical conductivity of the composites is increased by increasing temperature. The dependence of conductivity on temperature implies that the PANI-NSA/GR composites are organic semiconductors. POLYM. COMPOS., 35:60-67,

Polyaniline (PANI) composites containing poly(3-hydroxybutyric acid) (PHB) were synthesized via in situ deposition technique. The oxidative polymerization of aniline hydrochloride was carried out by dissolving different weight percentages (10 wt%, 20 wt%, 30 wt%, 40 wt%, and 50 wt%) of PHB using ammonium persulfate as an oxidant. The as-synthesized composites were characterized using Fourier-transform infrared spectroscopy and X-ray diffraction pattern. The surface morphology of the resulting composites was studied using transmission electron microscopy. The temperature-dependent direct current conductivity of the synthesized composite films was measured, and the activation energy responsible for the conductivity was examined. Incorporation of the biodegradable polymer, PHB, during the preparation of new PANI composites significantly increased the conductivity of the resulting composites. POLYM. COM-POS., 34:1655-1662