Antiviral coatings may help prevent transmission of COVID-19 in COATINGS TECH, Vol. 17, N° 7 (07/2020)  

[article]  inCOATINGS TECH > Vol. 17, N° 7 (07/2020) . - p. 14-15 Titre : Antiviral coatings may help prevent transmission of COVID-19 Type de document : texte imprimé Année de publication : 2020 Article en page(s) : p. 14-15 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens Revêtements antiviraux Revêtements hygiéniques Index. décimale : 667.9 Revêtements et enduits En ligne : https://drive.google.com/file/d/17XkN2gxaMQhc5FK3qxvd2TrD0d3Lsy7P/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34342 [article]

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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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The prospects for antiviral coatings / Peter Collins in SURFACE COATINGS INTERNATIONAL, Vol. 103.3 (05-06/2020)  

[article]  inSURFACE COATINGS INTERNATIONAL > Vol. 103.3 (05-06/2020) . - p. 122-127 Titre : The prospects for antiviral coatings Type de document : texte imprimé Auteurs : Peter Collins, Auteur ; Richard Kennedy, Auteur Année de publication : 2020 Article en page(s) : p. 122-127 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antimicrobiens Argent Cuivre Dioxyde de titane Nanoparticules Nanotubes Oxyde de graphène Photocatalyse Revêtements antiviraux Revêtements hygiéniques Index. décimale : 667.9 Revêtements et enduits Résumé : The current COVID-19 pandemic has had a dramatic effect on societies worldwide. Within a matter of weeks, normal day-to-day life changed to something more akin to a horror film as many nations introduced draconian measures in order to reduce the spread of the virus and prevent the numbers of patients requiring hospital treatment overwhelming their intensive care facilities. In light of the perceived high infectivity of the virus, members of the Royal Society of Chemistry's Surface Coatings Special Interest Group, in collaboration with the British Coatings Federation, organised a virtual gathering of more than 130 academics, industry specialists and representatives of healthcare and transport organisations to share knowledge about antiviral coatings and express views on what needs to be done to accelerate research output in this field. One of the aims of the meeting was to review hygienic coatings technology' and its prospects for fighting viruses. Note de contenu : - Use of surfactants - Copper and silver - Photocatalytic titanium dioxide nanoparticles - Coatings that regenerte an active agent - Graphene oxide and carbon nanotubes - The challenges En ligne : https://drive.google.com/file/d/13Xmw0syAVpYxNzLo85a-CPjw9OLoqTSo/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34339 [article]

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Using visible light to activate antiviral and antimicrobial properties of TiO2 nanoparticles in paints and coatings : focus on new developments for frequent-touch surfaces in hospitals / M. Schutte-Smith in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 3 (05/2023) . - p. 789-817 Titre : Using visible light to activate antiviral and antimicrobial properties of TiO2 nanoparticles in paints and coatings : focus on new developments for frequent-touch surfaces in hospitals Type de document : texte imprimé Auteurs : M. Schutte-Smith, Auteur ; E. Erasmus, Auteur ; R. Mogale, Auteur ; N. Marogoa, Auteur ; A. Jayiya, Auteur ; H. G. Visser, Auteur Année de publication : 2023 Article en page(s) : p. 789-817 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antibactériens Dioxyde de titane Enrobage (technologie) Lumière visible Nanoparticules Photocatalyse Revêtements antiviraux Revêtements organiques Revêtements:Peinture Index. décimale : 667.9 Revêtements et enduits Résumé : The COVID-19 pandemic refocused scientists the world over to produce technologies that will be able to prevent the spread of such diseases in the future. One area that deservedly receives much attention is the disinfection of health facilities like hospitals, public areas like bathrooms and train stations, and cleaning areas in the food industry. Microorganisms and viruses can attach to and survive on surfaces for a long time in most cases, increasing the risk for infection. One of the most attractive disinfection methods is paints and coatings containing nanoparticles that act as photocatalysts. Of these, titanium dioxide is appealing due to its low cost and photoreactivity. However, on its own, it can only be activated under high-energy UV light due to the high band gap and fast recombination of photogenerated species. The ideal material or coating should be activated under artificial light conditions to impact indoor areas, especially considering wall paints or frequent-touch areas like door handles and elevator buttons. By introducing dopants to TiO2 NPs, the bandgap can be lowered to a state of visible-light photocatalysis occurring. Naturally, many researchers are exploring this property now. This review article highlights the most recent advancements and research on visible-light activation of TiO2-doped NPs in coatings and paints. The progress in fighting air pollution and personal protective equipment is also briefly discussed. Note de contenu : - TOWARD VISIBLE-LIGHT ACTIVITY-DOPING : Metal dopants: reducing band gap energy - Non-metal dopants: reducing band gap energy - Photocatalytic activity - Antibacterial activity : crystal properties and dopants for visible-light photocatalytic disinfection - Dopants in coatings and paints - Dopants and incorporation into textiles - Antimicrobial activity of TiO2 in coatings and paint - ENVIRONMENTALLY FRIENDLY SYNTHESIS OF TIO2 - FINAL THOUGHTS AND FUTURE PROSPECTS DOI : https://doi.org/10.1007/s11998-022-00733-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00733-8.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39430 [article]

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