A study of the antibacterial activity and stability of dyed cotton fabrics modified with different forms of silver

Abstract

This study compares the effect of colloidal silver nanoparticles and the commercial RUCO-BAC AGP agent with silver chloride as the active component on the antibacterial activity of dyed cotton fabrics. Cotton fabrics were dyed with vat dyes Bezanthren Olive T and Bezanthren Grey FFB. The antibacterial activities of the silver-loaded dyed cotton fabrics were tested against the Gram-positive bacterium Staphylococcus aureus and the Gram-negative bacterium Escherichia coli. Unlike RUCO-BAC AGP, the synthesized silver nanoparticles deposited onto the dyed cotton fabrics provided maximum bacteria reduction, independent of the applied dye. The stability of the modified cotton fabrics was analyzed in artificial sweat at pH 5.5 and 8.0. Approximately the same amount of silver was released from the differently modified cotton fabrics in artificial sweat. Larger amounts of silver were released in the sweat at pH 8.0.

U ovom radu se porede efekti koloidnih nanočestica srebra i komercijalnog antimikrobnog agensa RUCO-BAC AGP sa srebro-hloridom kao aktivnom komponentom na antibakterijsku aktivnost bojene pamučne tkanine. Pamučne tkanine su bojene redukcionim bojama Bezanthren olive T i Bezanthren green FFB. Antibakterijska aktivnost srebra je testirana prema Gram-pozitivnoj bakteriji Staphylococcus aureus i Gram-negativnoj bakteriji Escherichia coli. Za razliku od RUCO-BAC AGP, sintetisane nanočestice srebra deponovane na obojenu pamučnu tkaninu su obezbedile maksimum bakterijske redukcije nezavisno od primenjene boje. Stabilnost modifikovanih pamučnih tkanina je analizirana u veštačkom znoju pri pH 5,5 i 8,0. Gotovo ista količina srebra se oslobađa sa različito modifikovanih pamučnih tkanina u veštačkom znoju. Veća količina srebra se oslobađa u znoju pri pH 8,0.