10/29/2010
Characterization of polyaniline/Ag nanocomposites using H2O2 and ultrasound radiation for enhancing rate
(pages 1662–1668)Polymer Composites 31 #9 (2010)
Li and Wang of Central South University,, China  synthesized these composites by in situ chemical oxidation polymerization of aniline in silver salt by sonochemical method using H2O2 as an external medium.  H2O2 was used to reduce AgNO3 to Ag nanoparticles as well as to polymerize aniline to polyaniline in the same pot.  Reduction of the silver salt in aqueous aniline leads to the formation of silver nanoparticles which in turn catalyze oxidation of aniline to polyaniline.  The composites possess a higher degradation temperature than polyaniline alone, and their electrical conductivity are raised more than 200 times. The cyclic voltammetry and impedance spectroscopy results showed that the polyaniline/Ag film exhibits considerably higher electroactivity compared with polyaniline film without Ag particles.  (RDC 12/15/2010)