Production of a sprayable waterborne polyurethane coating with silver nanoparticles for combating SARS-CoV-2 / Lucas Dall Agnol in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 6 (11/2023) . - p. 1935-1947 Titre : Production of a sprayable waterborne polyurethane coating with silver nanoparticles for combating SARS-CoV-2 Type de document : texte imprimé Auteurs : Lucas Dall Agnol, Auteur ; Heitor Luiz Ornaghi Jr., Auteur ; Juliano Roberto Ernzen, Auteur ; Fernanda Trindade Gonzalez Dias, Auteur ; Otavio Bianchi, Auteur Année de publication : 2023 Article en page(s) : p. 1935-1947 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens Argent Caractérisation Nanoparticules Polymères en émulsion Polyuréthanes Revêtements antiviraux Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : To halt the ongoing global pandemic of SARS-CoV-2, the use of antiviral surfaces becomes an interesting alternative to prevent the spread of pathogens through contaminated surfaces. In this context, waterborne polyurethane coatings with silver nanoparticles (WPU/AgNPs) were synthesized in order to confer antiviral activity to the nanocomposites for further application on surfaces. The chemical structure, physico-mechanical properties, cytotoxic, antibacterial, and antiviral properties of WPU/AgNPs nanocomposites were evaluated. The addition of nanoparticles in WPU did not change the structure of the polymer chain; hence, properties such as hardness, tensile strength, and elongation were not influenced. However, an increase in the surface hydrophobicity followed by a slight yellowing due to the intrinsic color of the nanosilver was observed. Furthermore, the nanocomposites did not show in vitro cytotoxicity for BALB/3T3 cells. The nanocomposites were tested against SARS-CoV-2, obtaining inactivation yields greater than 99.0%, and antibacterial activity against Escherichia coli and Staphylococcus aureus even after three months of use. Hence, these nanocomposites were produced as a sprayable polyurethane for surface coatings application, providing a fantastic finish to all kinds of surfaces such as tables, handrails, switches, and doorknobs. This finish is durable, attractive, and long-lasting. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of WPU/AgNPs nanocomposites - Characterization of WPU/AgNPs nanocomposites - RESULTS AND DISCUSSION : Chemical structure of WPU/AgNPs nanocomposites - Morphology and dispersion of AgNPs in nanocomposite films - Physical–mechanical properties - Surface free energy - UV–Vis spectroscopy and colorimetry - Leaching of the antiviral agent in an aqueous medium - Cell viability - Antiviral efficiency against Sars-CoV-2 - Antibacterial activity - Table 1 : Physical–mechanical properties of neat WPU and WPU/AgNPs nanocomposites - Table 2 : Contact angle (θ, °C) and surface free energy (γs) of WPU and WPU/AgNPs, including the dispersive (γsD) and polar (γsP) contributions - Table 3 : Colorimetric data of the CIE_L*a*b* using the neat WPU as reference (L*84.3; b*2.1, and a*5.9) - Table 4 Nanocomposites antibacterial activity DOI : https://doi.org/10.1007/s11998-023-00788-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00788-1.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40172 [article]

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