Sustainable and invisible anti-counterfeiting inks based on waterborne polyurethane and upconversion nanoparticles for leather products
Jun Xiang , Jianxun Lin , Zhonghui Wang , Shenglin Zhou , Zhenya Wang , Qiang Yan , Yidong Liu , Haojun Fan
Sustainable and invisible anti-counterfeiting inks based on waterborne polyurethane and upconversion nanoparticles for leather products
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.
National Natural Science Foundation of China(21905182)
Key Research and Development Program of Shandong Province(2019JZZY010355)
Synthetic Leather and High-Performance Fibers Innovation Team(2020SCUNG122)
Fundamental Research Funds for the Central Universities(YJ201940)
National Key Research and Development Program of China(2021YFC2101900)
615 Talent Introduction Program of Jiangsu Dongtai for Leading Talents
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