Journal
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
Volume 19, Issue 6, Pages 1224-1229Publisher
SOC BRASILEIRA QUIMICA
DOI: 10.1590/S0103-50532008000600025
Keywords
composites; polymers; surfaces; crystal growth; electron microscopy
Categories
Funding
- CNPq
- Fundacao Araucaria
- State of Parana, Brazil
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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.
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