木质磺酸钠基荧光碳量子点构筑皮革防伪层  

Construction of Leather Anti-Counterfeiting Layer by Fluorescent Carbon Quantum Dots Prepared from Sodium Lignosulfonate

作　　者：申佳露 林炜[1,2] 张金伟[1,2] 陈嘉怡 辜海彬[1,2] SHEN Jialu;LIN Wei;ZHANG Jinwei;CHEN Jiayi;GU Haibin(National Engineering Laboratory for Clean Technology of Leather Manufacture,Sichuan University,Chengdu 610065,China;Key Laboratory of Leather Chemistry and Engineering of Ministry of Education,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学制革清洁技术国家工程实验室,四川成都610065 [2]四川大学皮革化学与工程教育部重点实验室,四川成都610065

出　　处：《皮革科学与工程》2023年第6期17-23,30,共8页Leather Science and Engineering

基　　金：国家自然科学基金项目(21978180)。

摘　　要：以木质磺酸钠(SL)为碳源,邻苯二胺(OPDA)为氮源,通过水热法制备得到了氮掺杂的荧光碳量子点(N-CQDs)。它具有类球形的微观形貌和良好的水溶性,在254 nm和365 nm紫外灯下分别发射出蓝紫色和青绿色的荧光,表现出双通道荧光发射性能。将N-CQDs与阳离子型皮革涂饰剂以1∶4的体积比共混后得到荧光乳液(N-CW1-4),表现出良好的稳定性和分散性,平均水合粒径仅有42.3 nm,且同样表现出双通道荧光发射性能。N-CW1-4作为荧光防伪涂层被成功应用于皮革防伪,其构建的防伪点阵图案不论是在高温(65℃)、低温(-21℃)还是连续紫外辐射(365 nm)下均表现出优异的荧光稳定性。此外,在模拟淋雨和滚筒洗衣场景内,该防伪点阵涂层仍然具有牢靠的稳定性,并且N-CW1-4可被扩展到多种颜色皮革的防伪涂饰。研究为皮革防伪提供了新的方法和策略,对皮革市场的安全和良性发展具有积极意义。N-Doped fluorescent carbon quantum dots(N-CQDs)were prepared by hydrothermal method with sodium lignosulfonate as carbon source and O-phenylenediamine as nitrogen source.N-CQDs exhibited a spherical micro-morphology and good water-solubility,and could emit blue-violet and cyan-green fluorescence under 254 nm and 365 nm ultraviolet(UV)light,respectively,indicating the dual-channel fluorescence emission properties.A fluorescent emulsion(N-CW1-4)was further prepared by blending N-CQDs with cationic leather finishing agent at a volume ratio of 1∶4.N-CW1-4 possessed good stability and dispersion,and its average hydrated particle size was only 42.3 nm.Meanwhile,it could also exhibit the dual-channel fluorescence emission properties.N-CW1-4 as a fluorescent anti-counterfeiting coating was successfully applied in the field of leather anti-counterfeiting.The resulting anti-counterfeiting lattice pattern exhibited excellent fluorescence stability at high temperature(65℃),low temperature(-21℃),and continuous UV radiation(365 nm).In addition,the fluorescent anti-counterfeiting coating was still stable in the simulated rain and roller washing scenes.N-CW1-4 could also be extended to the anti-counterfeiting coatings with various colors of leather.This work provides a new method and strategy for leather anti-counterfeiting and has positive significance for the safety and benign development of leather market.

关 键 词：碳量子点 木质磺酸钠 荧光 皮革 防伪 

分 类 号：TQ127.1[化学工程—无机化工] TS57[轻工技术与工程—皮革化学与工程]