Nanomorphology characterization of sterically stabilized polypyrrole-palladium nanocomposite particles

作者：Takeoka Hiroaki; Fukui Nobuyuki; Sakurai Shinichi^*; Nakamura Yoshinobu; Fujii Syuji

来源：Polymer Journal, 2014, 46(10): 704-709.

DOI：10.1038/pj.2014.44

• conducting polymer
• dispersion polymerization
• nanocomposite
• nanoparticle
• small-angle X-ray scattering
• transmission electron microscopy

The nanomorphology of sterically stabilized polypyrrole-palladium nanocomposite particles synthesized by aqueous chemical oxidative dispersion polymerization has been extensively characterized by transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS). High-resolution TEM studies revealed that non-spherical nanocomposite particles were produced with a Heywood diameter of similar to 30nm and also confirmed the existence of palladium nanocrystals with a diameter of 5.4nm within the particles. SAXS studies on aqueous dispersions of the nanocomposite particles confirmed good colloidal stability and revealed that the average diameters of the Pd nanoparticles and the nanocomposite particles were 5.0 and 23 nm, respectively, which agreed well with the TEM results. Furthermore, their size distributions were revealed by the SAXS technique. The hydrodynamic diameter of the nanocomposite particles determined by dynamic light scattering was larger than those determined by TEM and SAXS, possibly owing to the presence of a hydrated colloidal stabilizer layer on the particle surfaces.

• 出版日期2014-10