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Incorporation of Metal-Based Nanoadditives into the PLA Matrix: Effect of Surface Properties on Antibacterial Activity and Mechanical Performance of PLA Nanoadditive Films.
Molecules. 2021 Jul 08; 26(14)M

Abstract

In this work, the modification process of poly(lactic acid) (PLA) with metal-based nanoparticle (NPs) additives (Ag, ZnO, TiO2) 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-TiO2 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 TiO2 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.

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Authors+Show Affiliations

Pušnik Črešnar K
Faculty of Mechanical Engineering, University of Maribor, 2000 Maribor, Slovenia.
Aulova A
Faculty of Mechanical Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia.
Bikiaris DN
Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece.
Lambropoulou D
Laboratory of Environmental Pollution Control, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece. Centre for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center, 10th km Thessaloniki-Thermi Rd, GR 57001 Thessaloniki, Greece.
Kuzmič K
Faculty of Mechanical Engineering, University of Maribor, 2000 Maribor, Slovenia.
Fras Zemljič L
Faculty of Mechanical Engineering, University of Maribor, 2000 Maribor, Slovenia.

MeSH

Anti-Bacterial AgentsAnti-Infective AgentsFood PackagingMetal NanoparticlesNanocompositesPermeabilityPolyestersSilverSurface PropertiesTensile StrengthZinc Oxide

Pub Type(s)

Journal Article

Language

eng

PubMed ID

34299434

Citation

Pušnik Črešnar, Klementina, et al. "Incorporation of Metal-Based Nanoadditives Into the PLA Matrix: Effect of Surface Properties On Antibacterial Activity and Mechanical Performance of PLA Nanoadditive Films." Molecules (Basel, Switzerland), vol. 26, no. 14, 2021.
Pušnik Črešnar K, Aulova A, Bikiaris DN, et al. Incorporation of Metal-Based Nanoadditives into the PLA Matrix: Effect of Surface Properties on Antibacterial Activity and Mechanical Performance of PLA Nanoadditive Films. Molecules. 2021;26(14).
Pušnik Črešnar, K., Aulova, A., Bikiaris, D. N., Lambropoulou, D., Kuzmič, K., & Fras Zemljič, L. (2021). Incorporation of Metal-Based Nanoadditives into the PLA Matrix: Effect of Surface Properties on Antibacterial Activity and Mechanical Performance of PLA Nanoadditive Films. Molecules (Basel, Switzerland), 26(14). https://doi.org/10.3390/molecules26144161
Pušnik Črešnar K, et al. Incorporation of Metal-Based Nanoadditives Into the PLA Matrix: Effect of Surface Properties On Antibacterial Activity and Mechanical Performance of PLA Nanoadditive Films. Molecules. 2021 Jul 8;26(14) PubMed PMID: 34299434.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Incorporation of Metal-Based Nanoadditives into the PLA Matrix: Effect of Surface Properties on Antibacterial Activity and Mechanical Performance of PLA Nanoadditive Films. AU - Pušnik Črešnar,Klementina, AU - Aulova,Alexandra, AU - Bikiaris,Dimitrios N, AU - Lambropoulou,Dimitra, AU - Kuzmič,Katja, AU - Fras Zemljič,Lidija, Y1 - 2021/07/08/ PY - 2021/06/04/received PY - 2021/06/29/revised PY - 2021/07/01/accepted PY - 2021/7/24/entrez PY - 2021/7/25/pubmed PY - 2021/9/21/medline KW - SEM analysis KW - antibacterial activity KW - composite additive films KW - nanoindentation KW - nanoparticles KW - poly(lactic acid) KW - surface free energy calculation JF - Molecules (Basel, Switzerland) JO - Molecules VL - 26 IS - 14 N2 - In this work, the modification process of poly(lactic acid) (PLA) with metal-based nanoparticle (NPs) additives (Ag, ZnO, TiO2) 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-TiO2 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 TiO2 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. SN - 1420-3049 UR - https://www.unboundmedicine.com/medline/citation/34299434/Incorporation_of_Metal_Based_Nanoadditives_into_the_PLA_Matrix:_Effect_of_Surface_Properties_on_Antibacterial_Activity_and_Mechanical_Performance_of_PLA_Nanoadditive_Films_ DB - PRIME DP - Unbound Medicine ER -