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

Rafael Silva¹  Marcos H. Kunita¹  Emerson M. Girotto¹  Eduardo Radovanovic¹  Edvani C. Muniz¹  Gizilene M. Carvalho¹  Adley F. Rubira¹ 

[1] ,Universidade Estadual de Maringá Departamento de Química Grupo de Materiais Poliméricos e CompósitosMaringá PR ,Brazil

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

DOI  :  10.1590/S0103-50532008000600025

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】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License