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Synthesis, Properties and Application of Conducting PPY Nanoparticles

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Abstract

The successful fabrication, various structure, unique properties, and wide application potential of novel conducting polypyrrole (PPY) nanoparticles and nanocomposites with an intrinsically electrical conductivity have been systematically reviewed. Wholly new pyrrole (PY) copolymer nanoparticles were synthesized by a chemical oxidative precipitation polymerization from 20 mol% PY and 80 mol% 4-sulfonic diphenylamine (SD) in HCl aqueous solution without any external stabilizer. Their structure and morphology were characterized by laser particle-size analyzer and transmission electron microscopy. Unique effects of polymerization temperature on the polymerization yield, particle size, and bulk electrical conductivity were systematically studied. The number-average diameter of the particles in water depends on the polymerization temperature from 0 to 25°C, reaching a minimum of 78 nm with an extremely low polydispersity index of 1.033 by laser particle-size analyzer. Dry particles exhibit much smaller size of around 10 nm based on a high-resolution transmission electron microscopy observation. The PY/SD (20/80) copolymer has a gradually increased conductivity from 1 × 10−4 to 5 × 10−3 S/cm with lowering polymerization temperature from 25 °C to 0°C. The relatively low purity, poor self-stability, and high cost of the nanoscale PPYs with intrinsic electroconductivity could be overcome by effortlessly incorporating a certain amount of SD comonomer as internal emulsifier during PY polymerization in emulsifier-free HCl aqueous solution.

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Correspondence to Xingui Li .

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© 2009 Tsinghua University Press, Beijing and Springer-Verlag GmbH Berlin Heidelberg

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Li, X., Huang, M., Xie, Y. (2009). Synthesis, Properties and Application of Conducting PPY Nanoparticles. In: Shi, D. (eds) NanoScience in Biomedicine. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-49661-8_22

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