Preparation of Ag-PS and Ag-PSS Particles by gamma-Irradiation and Their Antimicrobial Efficiency against Staphylococcus aureus ATCC 6538 and Klebsiella pneumoniae ATCC 4352

摘要

Polystyrene,PS,particles of 450 nm diameter and poly(styrene-co-styrene sulfonate),PSS,particles of 140-160 nm diameter were prepared by emulsifier-free emulsion polymerization.The surfaces of the PS and PSS particles were coated with Ag nanoparticles for the application of antimicrobial agents by reduction of Ag ions using gamma-irradiation.The Ag-PS and Ag-PSS were characterized by High-Resolution Transmittance Electron Microscopy (HR-TEM),Field-Emission Scanning Electron Microscopy (FE-SEM),and Energy Dispersive X-ray Spectroscopy (EDXS).The HR-TEM and EDXS data showed that the Ag nanoparticles were loaded on the surface of the PS and PSS particles,respectively.The antimicrobial efficiency of the Ag-PS and Ag-PSS particles (0.4 g)with ca.100 ppm Ag,which was coated onto yarn (KS K 0905-1996 rule),was tested against Staphylococcus aureus ATCC 6538 and Klebsiella pneumoniae ATCC 4352 after 100 washing cycles (KS K 0432-1999 rule).The antimicrobial efficiency of the Ag-PS particles against Staphylococcus aureus ATCC 6538 and Klebsiella pneumoniae ATCC 4352 was 99.9% after 100 cycles washing.,confirming that the Ag-PS particles can be used as antimicrobial agents.