%0 Journal Article
%T Synthesis of Ag-PVA and Ag-PVA/PET-s20 composites by supercritical CO2 method and study of silver nanoparticle growth
%A Silva
%A Rafael
%A Kunita
%A Marcos H.
%A Girotto
%A Emerson M.
%A Radovanovic
%A Eduardo
%A Muniz
%A Edvani C.
%A Carvalho
%A Gizilene M.
%A Rubira
%A Adley F.
%J Journal of the Brazilian Chemical Society
%D 2008
%I Sociedade Brasileira de Qu¨Şmica, SBQ
%R 10.1590/S0103-50532008000600025
%X supercritical co2 has been used to prepare silver polymer composites, silver/poly(vinyl alcohol) and silver/poly(vinyl alcohol)/sulfonated poly(ethylene terephthalate) through impregnation of a silver precursor in solid-state polymeric matrices followed by thermal reduction of the silver precursor. x-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, atomic force microscopy, thermogravimetric analysis and uv/vis spectroscopy indicate that synthesis conditions and polymeric matrix composition affect silver particle size, shape and distribution in polymeric matrices. silver particles are smaller, have a more uniform shape and present narrower size distribution in pva-rich than in pets-rich composites.
%K composites
%K polymers
%K surfaces
%K crystal growth
%K electron microscopy.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-50532008000600025&lng=en&nrm=iso&tlng=en