木质素碳量子点在防伪包装中的应用研究

Application of Lignin Carbon Quantum Dots in Anti-counterfeiting Packaging

目的 探索木质素碳量子点(CQDs)荧光油墨及其书写式标签、CQDs/聚乙烯醇(PVA)复合荧光薄膜在防伪包装中的应用潜力。方法 以木质素为碳源,采用一锅水热法得到未掺杂碳量子点O-CQDs和硫掺杂碳量子点S-CQDs,并以此为荧光填料,以乙醇、乙二醇和丙三醇的混合液为溶剂,制备荧光油墨及其书写式荧光标签和CQDs/PVA复合荧光薄膜,探索其荧光防伪性能。结果 硫掺杂木质素碳量子点油墨MS-CQDs及其书写标签、PVA复合薄膜在可见光下均无色,在365nm紫外光照下则呈现强烈的淡蓝色荧光。结论 MS-CQDs书写式称量纸荧光标签及其与PVA的复合薄膜均具有良好的荧光性能,在荧光防伪领域具有良好的应用潜力。

The work aims to explore the application potential of lignin carbon quantum dots(CQDs)fluorescent ink and its writing label,and CQDs/polyvinyl alcohol(PVA)composite fluorescent films in anti-counterfeiting packaging.With lignin as the carbon source,undoped carbon quantum dots O-CQDs and sulfur-doped carbon quantum dots S-CQDs were obtained by the one-pot hydrothermal method.Fluorescent ink,and its writing fluorescent labels,and CQDs/PVA composite fluorescent films were prepared,and their fluorescence anti-counterfeiting performance was explored.The sulfur-doped lignin-carbon quantum dots ink MS-CQDs,their writing labels,and PVA composite films were colorless under visible light and showed bright blue fluorescence under 365 nm ultraviolet light.In conclusion,MS-CQDs writing weighing paper fluorescent labels and their composite films with PVA have good fluorescence performance and have good application potential in fluorescence anti-counterfeiting.