Sustainable and invisible anti-counterfeiting inks based on waterborne polyurethane and upconversion nanoparticles for leather products / Jun Xiang in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 3 (Année 2021)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 3 (Année 2021) . - 11 p. Titre : Sustainable and invisible anti-counterfeiting inks based on waterborne polyurethane and upconversion nanoparticles for leather products Type de document : texte imprimé Auteurs : Jun Xiang, Auteur ; Jianxun Lin, Auteur ; Zhonghui Wang, Auteur ; Shenglin Zhou, Auteur ; Zhenya Wang, Auteur ; Qiang Yan, Auteur ; Yidong Liu, Auteur ; Haojun Fan, Auteur Année de publication : 2021 Article en page(s) : 11 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Contrefaçon -- Lutte contre Cuir Encre en phase aqueuse Mesures biophysiques Nanoparticules Polyuréthanes Produits commerciaux -- Contrefaçon Rayonnement infrarouge Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Counterfeit leather products infringe the intellectual property rights of the business, cause enormous economic loss, and negatively influence the business enthusiasm for innovation. However, traditional anti-counterfeiting materials for leather products suffer from complicated fabrication procedures, photobleaching, and high volatile organic compound (VOC) emissions. Here, a sustainable and invisible anti-counterfeiting ink composed of waterborne polyurethane and water-dispersible lanthanide-doped upconversion nanoparticles (UCNPs) featuring ease of preparation, high photostability, non-toxicity, low VOC emissions, and strong adhesion strength for leather products is designed and synthesized. After decorating on the surface of leather products, the obtained patterns are invisible under normal light conditions. Upon irradiation at 808 nm, the invisible patterns can be observed by naked eyes due to the visible light emitted by 808 nm excited UCNPs. Our approach described here opens a new pathway to realize the long-term, stable anti-counterfeiting function of leather products. Note de contenu : - MATERIALS AND METHODS : Materials - Experimental methods - Measurements - RESULTS AND DISCUSSION : OA-UCNPs nanoparticles - PVP-UCNPs nanoparticles - The WPU dispersion - The sustainable and invisible ACI - Application DOI : https://doi.org/10.1186/s42825-021-00076-x En ligne : https://link.springer.com/content/pdf/10.1186/s42825-021-00076-x.pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37558 [article]

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