In this study, an underwater impulse discharge initiated in an aqueous suspension of a polylactide acid between silver rods is applied to produce silver nanoparticles (AgNPs) and create a polymer nanocomposite. The spectral and energy characteristics of the discharge are obtained. The composites are characterized by methods of scanning electron microscopy, transmission electron microscopy, infrared spectroscopy, and thermogravimetric analysis. Investigation of the formation of the composite of polylactic acid (PLA) with AgNP has been performed using the molecular dynamics method. The PLA/AgNPs composite films were effective against Escherichia coli, Staphylococcus aureus, Bacillus subtilis, Candida albicans, and thus may find future application in the food packaging area.

In this study, an environment-friendly, energy-saving, and useful synthesis of zinc oxide (ZnO) nanoparticles (NPs), titanium oxide (TiO 2 ) NPs, and mixed Zn/TiO x -NPs was achieved using underwater pulse discharge plasma. The obtained NPs were characterized by UV spectroscopy, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. In the discharge cell, the viscose patch is impregnated with ZnO, TiO 2 , and mixed Zn/TiO x -NPs in a one-step process. The adhesive patch is effective against Escherichia coli, Staphylococcus albicans, and Bacillus subtilis. The viscose patch containing 0.22% Zn/TiO x -NPs demonstrated the highest antimicrobial activity. These antimicrobial patches can be used to treat and cover wounds susceptible to infection. K E Y W O R D S antimicrobial patches, mixed Zn/TiO x nanoparticles, plasma, wound therapy

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