Synthesis of Ag-PVA and Ag-PVA/PET-s20 composites by supercritical CO2 method and study of silver nanoparticle growth

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....

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Bibliographic Details
Published inJournal of the Brazilian Chemical Society Vol. 19; no. 6; pp. 1224 - 1229
Main Authors Silva, Rafael, Kunita, Marcos H., Girotto, Emerson M., Radovanovic, Eduardo, Muniz, Edvani C., Carvalho, Gizilene M., Rubira, Adley F.
Format Journal Article
LanguageEnglish
Published Sociedade Brasileira de Química 2008
Subjects
CHEMISTRY, MULTIDISCIPLINARY
composites
electron microscopy
polymers
crystal growth
surfaces
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Summary: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.
ISSN:0103-5053
1678-4790
DOI:10.1590/S0103-50532008000600025