Characterization of antibacterial, mechanical, and structural properties of polyvinyl chloride/silver nitrate composites prepared by thermoplastic compounding

Abstract

Byly připraveny kompozity na bázi polyvinylchloridu a dusičnanu stříbrného pomocí termoplastické metody. Byly sledovány antibakteriální charakteristiky proti Gram pozitivním i negativním kmenům. Byla použita metoda XRD, XPS a optická mikroskopie ke studiu struktury kompozitů. Byly sledovány mechanické vlastnosti kompozitů. Výsledky ukazují dobrou distribuci plniva v matrici a antibakteriální vlastnosti. XPS studie ukazují na přítomnost stříbra ve formě Ag+.

Polyvinyl chloride/silver nitrate composites were prepared by thermoplastic compounding. Antibacterial activity against gram-negative and gram-positive bacteria was determined by agar diffusion test. X-ray diffraction, X-ray photoelectron spectroscopy, and optical microscopy analyses were carried out to determine the effect of polyvinyl chloride modification on structural properties. The mechanical characteristics of prepared films were observed using stress-strain analysis. The results revealed that final composites exhibit sufficient antibacterial properties against tested bacteria, with nonuniform distribution of silver particles in the PVC matrix, which caused a decrease in mechanical properties. X-ray characterization proved the presence of the modifier, mostly in Ag+ form.