Antimicrobial Properties of Polystyrene Nanocomposites Dopped with Silver Nanoparticles Supported on Titanium Dioxide

Guillermo Acosta-Gonzalez, Fatima Perez-Rodriguez, Oscar Vega-Becerra, Servando Aguirre-Tostado, Obed Ramirez-Esquivel, Facundo Ruiz
Nanomateriales, MX

Keywords: Polystyrene, Titanium Dioxide, Silver Nanoparticles, Bactericidal Effect, Nanocomposites

Summary:

By adding silver nanoparticles supported on titanium dioxide (TiO2@Ag) in polymeric matrix, develop the ability to inhibit the growth of microorganisms on surfaces where they are applied. Silver nanoparticles were synthesized on the surface of titanium dioxide (TiO2) particles, by chemical deposition route, setting the appropriate synthesis method to control their size, shape and dispersion. Nanoparticles was characterized to determine their size, crystalographic, zeta potential and antimicrobial properties. The results show the incorporation of dispersedly silver nanoparticles on the surface of TiO2, with appropriate biocidal characteristics. Incorporation of nanoparticles (TiO2@Ag) in polystyrene (PS) matrix was performed by ultrasonic dispersion in common solvent. Homogenization of melt compounding was performed in a twin-screw extruder. Biocidal polymeric surfaces PS/TiO2@Ag were prepared with different concentrations of nanoparticles, biocidal tests of TiO2/Ag and PS/TiO2/Ag against Escherichia coli and Staphylococcus aereus confirm a bactericidal action of nanoparticles even on the surface of polymeric composite.