基于碳量子点的紫外荧光防伪膜的制备  

Preparation of UV fluorescent anti-counterfeiting film based on carbon quantum dots

作　　者：李守博 谈丽丽 韩玉琦 刘彩云 佟永纯 籍向东 Li Shoubo;Tan Lili;Han Yuqi;Liu Caiyun;Tong Yongchun;Ji Xiangdong(College of Chemistry and Chemical Engineering,Hexi University,Zhangye 734000;Key Laboratory of Hexi Corridor Resources Utilization of Gansu,Zhangye 734000)

机构地区：[1]河西学院化学化工学院,张掖734000 [2]甘肃省河西走廊特色资源利用重点实验室,张掖734000

出　　处：《化工新型材料》2021年第11期89-92,共4页New Chemical Materials

基　　金：国家自然科学基金(21865007);甘肃省科技计划资助项目(18JR3RG205);甘肃省大学生创新创业训练计划项目(2019-60);河西学院第十批大学生科技创新项目(2019-119)。

摘　　要：以双氰胺和柠檬酸钠为原料制备分散性非常好的蓝色荧光碳量子点,对制备条件进行了优化,通过实验制备的碳量子点溶液在反应时间为4h、双氰胺和柠檬酸钠的质量比为2.5∶1,200℃反应4h时制备的碳量子点荧光强度最高位为3777。通过荧光分光光度计、透射电镜、傅里叶变换红外光谱仪、紫外分光光度计等手段对碳量子点进行了表征。结果表明:在聚乙烯醇中分别加入0mL、5mL、10mL、15mL、20mL、25mL、30mL的碳量子点溶液,制备出了一系列碳量子点掺杂量不同的紫外荧光防伪膜。Using dicyandiamide and sodium citrate as raw materials,the blue fluorescent carbon quantum dots(CQDs)with very good dispersion were prepared.The preparation conditions were optimized.The reaction time of the CQDs solution prepared through experiments was 4 h,the mass ratio of dicyandiamide and sodium citric acid was2.5∶1,and the fluorescence intensity of the CQDs prepared at 200℃for 4 hours was 3777.The CQDs were characterized by fluorescence spectrophotometer,transmission electron microscope,fourier transform infrared spectrometer and ultraviolet spectrophotometer.Add 0 mL,5 mL,10 mL,15 mL,20 mL,25 mL,30 mL of the CQDs on to polyvinyl alcohol.A series of UV fluorescent anti-counterfeiting films with different doping amounts of the CQDs were prepared.

关 键 词：碳量子点 荧光 紫外荧光防伪 

分 类 号：TQ322.2[化学工程—合成树脂塑料工业]