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Radiolytic synthesis and characterization of Ag-PVA nanocomposites
Authors:Aleksandra N Krklješ  Jovan M Nedeljkovi?
Institution:Institute for Nuclear Sciences Vinca, Laboratory for Radiation Chemistry, Mike Alasa 12-14, 11001 Belgrade, Serbia and Montenegro
Abstract:The Ag-PVA nanocomposites with different contents of inorganic phase were prepared by reduction of Ag+ ions in aqueous PVA solution by gamma irradiation followed by solvent evaporation. Optical properties of the colloidal solutions and the nanocomposite films were investigated using UV-vis spectroscopy. Structural characterization of the Ag nanoparticles was performed by TEM and XRD. Interaction of the Ag nanoparticles with polymer matrix and the heat resistance of the nanocomposites were followed by IR spectroscopy and DSC analysis. IR spectra indicated that Ag nanofiller interact with PVA chain over OH groups. The changes of heat resistance upon the increase of the content of inorganic phase are correlated to the adsorption of polymer chains on the surface of Ag nanoparticles.
Keywords:Ag nanoparticles  PVA  Polymer nanocomposites  Radiation chemistry  Thermooxidative degradation
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