Antimicrobial Fiber Products Treated with Silica Hybrid Ag Nanoparticles
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Silica hybrid silver nanoparticles showing the strong antimicrobial activity, in whichnano-silver is bound to silica molecules, has been synthesized using γ-irradiation at room temperature. The present study relates to an antimicrobial composition for coating fiber products comprisingsilica hybrid silver nanoparticles. In this study, we describe antimicrobial fiber products coatedwith the silica hybrid silver nanoparticles and a method of antimicrobially treating fiber productsby coating the fiber products with the silica hybrid silver nanoparticles. The antimicrobial fiberproducts exhibited excellent antimicrobial effects. In detailed practice, when the present compositioncomprising nanosized silica-silver was applied to a cloth (fabric) in a concentration of 6.4mgyard-1, the viable cell number decreased to less than 10 cells before and after laundering, resultingin a reduction of 99.9% or greater in the viable cell number. The present composition displays longlastingpotent disinfecting effects on bacteria. Also, we investigated the toxicity of silica hybrid silvernanoparticles in rats. The skin of rats was treated with a 30 ppm nanoparticles solution (2 ml Kg-1)for 8 days. No toxicity was detected in the treatment. These results suggest that the fiber productscoated with the silica hybrid silver nanoparticles can be used to inhibit the growth of various microorganisms.
Abstract
Silica hybrid silver nanoparticles showing the strong antimicrobial activity, in whichnano-silver is bound to silica molecules, has been synthesized using γ-irradiation at room temperature. The present study relates to an antimicrobial composition for coating fiber products comprisingsilica hybrid silver nanoparticles. In this study, we describe antimicrobial fiber products coatedwith the silica hybrid silver nanoparticles and a method of antimicrobially treating fiber productsby coating the fiber products with the silica hybrid silver nanoparticles. The antimicrobial fiberproducts exhibited excellent antimicrobial effects. In detailed practice, when the present compositioncomprising nanosized silica-silver was applied to a cloth (fabric) in a concentration of 6.4mgyard-1, the viable cell number decreased to less than 10 cells before and after laundering, resultingin a reduction of 99.9% or greater in the viable cell number. The present composition displays longlastingpotent disinfecting effects on bacteria. Also, we investigated the toxicity of silica hybrid silvernanoparticles in rats. The skin of rats was treated with a 30 ppm nanoparticles solution (2 ml Kg-1)for 8 days. No toxicity was detected in the treatment. These results suggest that the fiber productscoated with the silica hybrid silver nanoparticles can be used to inhibit the growth of various microorganisms.
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