Influence of shelf-life stability on antimicrobial efficiency of aqueous acrylic dispersion containig nano oxides and organic biocide

Abstract

Antimicrobial paints were formulated based on various nano particles of zinc oxide and organic biocide. The aqueous acrylic dispersion was used as a binder for this system. A control paint without nanoparticles was formulated. The antimicrobial ability, shelf-life stability and photoactivity were assumed in these paints based on nano zinc oxide with organic biocide. It is possible to observe the photoactivity thanks to a change in organic dyes due to oxidative-reductive reaction. The agar dilution method was used for a test of the antimicrobial ability. The Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus were chosen as test bacteria. A great antibacterial inhibition of Escherichia coli and Staphylococcus aureus sis exhibited both coatings, and they are antimicrobially active after 12 months of shelf stability.