LEONARDO GUEDES MARCHINI

Resultados de Busca

Agora exibindo 1 - 1 de 1

Incorporation of silver nanoparticles in zinc oxide matrix in Polyester Thermoplastic Elastomer (TPE-E) aiming antibacterial activity
2019 - MARCHINI, LEONARDO G.; PARRA, DUCLERC F.; RANGARI, VIJAYA K.
The purpose of present study is to evaluate the antimicrobial potential of Thermoplastic Polyester Elastomer (TPE-E) incorporated with zinc oxide added with colloidal dispersion of metallic silver adsorbed on pyrogenic silica (AgNPs_ZnO). A combination of single screw extruder and hot press technique was used to fabricate these polymer nanocomposite films. These polymer nanocomposite films were prepared by mechanical mixing of 1% (w/w) of oil, anti-oxidant 0.05% (w/w), TPE-E granules 0.5% (w/w) and followed by single screw extruder to produce the pellets. As-prepared pellets were further melted for films in hot press technique. Antimicrobial activity was evaluated according to Japan Industrial Standard—JIS Z 2801 in TPE-E compounds against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). TPE-E samples containing additives 0.05 and 0.5% AgNPs_ZnO presented 75 and93%bactericidal reduction for Gram-negative bacteria Escherichia coli (E. coli) and 76 and 92% bactericidal activity reduction for Gram-positive bacteria Staphylococcus aureus (S. aureus), respectively.