20.500.12556/RUL-135721 Incorporation of metal-based nanoadditives into the PLA matrix effect of surface properties on antibacterial activity and mechanical performance of PLA nanoadditive films In this work, the modification process of poly(lactic acid) (PLA) with metal-based nanoparticle (NPs) additives (Ag, ZnO, TiO$_2$) at different loading (0.5, 1.0, and 2.5 wt%) and by melt-mix extrusion method followed by film formation as one of the advantageous techniques for industrial application have been investigated. PLA nanoparticle composite films (PLA-NPs) of PLA-Ag, PLA-ZnO, PLA-TiO$_2$ were fabricated, allowing convenient dispersion of NPs within the PLA matrix to further pursue the challenge of investigating the surface properties of PLA-NPs reinforced plastics (as films) for the final functional properties, such as antimicrobial activity and surface mechanical properties. The main objective was to clarify how the addition of NPs to the PLA during the melt extrusion process affects the chemistry, morphology, and wettability of the surface and its further influence on the antibacterial efficiency and mechanical properties of the PLA-NPs. Therefore, the effect of Ag, ZnO, and TiO$_2$ NPs incorporation on the morphology (SEM), elemental mapping analysis (SEM-EDX), roughness, surface free energy (SFE) of PLA-NPs measured by goniometry and calculated by OWRK (Owens, Wendt, Rabel, and Kaelble) model was evaluated and correlated with the final functional properties such as antimicrobial activity and surface mechanical properties. The developed PLA-metal-based nanocomposites, with improved mechanical and antimicrobial surface properties, could be used as sustainable and biodegradable materials, offering desirable multifunctionalities not only for food packaging but also for cosmetics and hygiene products, as well as for broader plastic products where antimicrobial activity is desirable. poly(lactic acid) nanoparticles composite additive films SEM analysis surface free energy calculation antibacterial activity nanoindentation nanodelci kompozitni dodajalni filmi SEM analiza antibakterijska aktivnost nanovtiskovanje true false true Angleški jezik Slovenski jezik Članek v reviji 2022-03-29 15:03:33 2022-03-29 15:03:34 2022-09-14 04:14:50 0000-00-00 00:00:00 2021 0 0 28 str. iss. 14, art. 4161 Vol. 26 Jul. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 677.017:620.3 1420-3049 10.3390/molecules26144161 69842179 RAZ_Pusnik_Cresnar_Klementina_2021.pdf RAZ_Pusnik_Cresnar_Klementina_2021.pdf 1 066CBDCBF7FFDCB15ABA2555C50ACF39 e2ee5bdfe97586899a6d2c0d69eddd173d95e0a8be1703f59c0e5a317db0f1b0 d950505f-af60-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154981 https://www.mdpi.com/1420-3049/26/14/4161 0 b500b8b3-af60-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154979 Fakulteta za strojništvo 0 0 0