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Characterization of polyaniline/Ag nanocomposites using H 2 O 2 and ultrasound radiation for enhancing rate
Author(s) -
Li Zhihua,
Wang Yanwei
Publication year - 2010
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.20956
Subject(s) - polyaniline , aniline , materials science , nanocomposite , cyclic voltammetry , polyaniline nanofibers , polymerization , conductive polymer , nanoparticle , dielectric spectroscopy , chemical engineering , silver nanoparticle , aqueous solution , nuclear chemistry , composite material , polymer , electrochemistry , nanotechnology , chemistry , organic chemistry , electrode , engineering
Polyaniline/Ag nanocomposites have been synthesized via in situ chemical oxidation polymerization of aniline in silver salt by sonochemical method using H 2 O 2 as an external medium. H 2 O 2 was used to reduce AgNO 3 to Ag nanoparticles as well as to polymerize aniline to polyaniline in the same pot. The ultrasound radiation as an energy source was applied to facilitate the reaction by reducing the reaction time. 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 research on the structures and properties of the composites showed the individual or aggregated silver nanoparticles are dispersed in the matrix of polyaniline. The composites possess a higher degradation temperature than polyaniline alone, and their electrical conductivity are raised morethan 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. POLYM. COMPOS., 31:1662–1668, 2010. © 2009 Society of Plastics Engineers