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Abstract: A polyaniline/rutile-TiO2 nanocomposite, with a conductivity of 0.5 S cm−1 at 25 °C, was prepared by in-situ polymerization of aniline in the presence of rutile-TiO2 nanoparticles, and was characterized by Fourier-transform infrared spectra, wide-angle X-ray diffraction, transmission electron microscopy, conductivity and cyclic voltammetry, as well as thermogravimetric analysis. The introduction of conducting polyaniline (PANI), not only improved the conductivity of rutile-TiO2 nanoparticles, but also improved the dispersibility of rutile-TiO2 nanoparticles. It can potentially be used in commercial applications as fillers for antistatic and anticorrosion coatings. [Copyright &y& Elsevier]

A conducting diatomite was obtained by polyaniline on surface modification of diatomite, and was characterized via Fourier-transform Raman spectra, UV-Vis absorption spectra, thermogravimetric analysis and scanning electron microscope, as well as conductivity. The results of spectroanalysis illustrate that polyaniline is not simply blended with diatomite. An interaction exists at the interface of diatomite and polyaniline, which may associate with hydrogen bond formed between the surface of diatomite with electronegativity and N&z.sbnd;H bond in polyaniline macromolecule. The results of thermogravimetric analysis suggest that the conducting diatomite only contains 8% polyaniline by mass, but its conductivity has reached 2.8×10−2 S cm−1 at 20 °C. [Copyright &y& Elsevier]

A composite of polyaniline (PAn) encapsulating titania (TiO2) with nanometer size was prepared by the oxidating aniline hydrochloride with ammonium peroxodisulfate in the presence of TiO2 nanoparticles. The obtained composite was characterized by Fourier-transform infrared spectra (FTIR), Fourier-transform Raman spectra, thermogravimetric analysis (TGA), wide-angle X-ray diffraction (WXRD) and scanning electron microscope (SEM). The conductivity was also investigated. FTIR and FT-Raman spectra measurements show that PAn and TiO2 nanoparticles are not simply blended or mixed up, and a strong interaction exists at the interface of nano-TiO2 and PAn. It is probably a composite at molecular level. TGA results suggests that PAn/nano-TiO2 composite contains 10% PAn by mass. The conductivity of PAn/nano-TiO2 composite has reached 2.9×10−2 S cm−1 at 20 °C but the morphology and crystallinity of nano-TiO2 were unchanged. [Copyright &y& Elsevier]