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

Journal of the Brazilian Chemical Society

Kunita, Marcos H.¹  Radovanovic, Eduardo¹  Universidade Estadual de Maringá, Maringá, Brazil¹  Girotto, Emerson M.¹  Muniz, Edvani C.¹  Carvalho, Gizilene M.¹  Rubira, Adley F.¹  Silva, Rafael¹ 

关键词: composites;    polymers;    surfaces;    crystal growth;    electron microscopy;   

DOI  :  10.1590/S0103-50532008000600025

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

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.

【 授权许可】

Unknown