Sustainable and invisible anti-counterfeiting inks based on waterborne polyurethane and upconversion nanoparticles for leather products

Journal of Leather Science and Engineering

Zhenya Wang¹  Jun Xiang¹  Zhonghui Wang¹  Shenglin Zhou¹  Haojun Fan¹  Jianxun Lin¹  Yidong Liu²  Qiang Yan³ 

[1] College of Biomass Science and Engineering, Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, National Engineering Research Center of Clean Technology in Leather Industry, State Key Laboratory of Polymer Materials Engineering, Sichuan University;Dongtai City Fu’an Synthetize Material Co. Ltd.;State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University;

关键词: Sustainable;    Invisible anti-counterfeiting;    Waterborne polyurethane;    Upconversion nanoparticles;    Near-infrared light;   

DOI  :  10.1186/s42825-021-00076-x

来源: DOAJ

【 摘 要 】

Abstract 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. Graphical Abstract

【 授权许可】

Unknown