基于环氧树脂的显隐性复合防伪薄膜的制备  

Preparation of Explicit and Recessive Composite Anti-Counterfeiting Film Based on Epoxy Resin

作　　者：周震宇 朱晓梅 贺绍瑞 孟宜南 边飞 徐朝鹏[1] Zhou Zhenyu;Zhu Xiaomei;He Shaorui;Meng Yinan;Bian Fei;Xu Zhaopeng(The Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province,School of Information Science and Engineering,Yanshan University,Qinhuangdao 06600A,Hebei,China)

机构地区：[1]燕山大学信息科学与工程学院河北省特种光纤与光纤传感实验室,河北秦皇岛066004

出　　处：《光学学报》2022年第10期159-166,共8页Acta Optica Sinica

基　　金：军委科技委科技创新项目(1716313ZT009109001)。

摘　　要：利用不同粒径的SiO_(2)纳米微球在聚乙烯基板上提拉自组装,形成了不同粒径微球排布的结构色薄膜。随后,在结构色薄膜中加入掺有稀土铝酸锶长余辉材料的光固化环氧树脂,利用掩模法形成长余辉图案,并使用氢氧化钠溶液对薄膜进行蚀刻,制备了具有高稳定性的长余辉和结构色的复合防伪薄膜。结果表明:利用表层光子晶体结构的光子带隙匹配底部图案的荧光波段,并通过刮擦、润湿等简单方法,即可实现底部荧光图案的显示;通过乙醇擦拭,表层结构能够快速恢复,再度实现荧光图案的隐藏,该方法可以使得防伪标签能够通过可重写方式进行反复使用。此外,腐蚀和弯曲测试表明,所制备薄膜具有很强的鲁棒性。SiO_(2)nanospheres with different particle sizes are self-assembled on polyethylene substrate to form structural color films with different size microspheres.Then,photocurable epoxy resin mixed with rare earth doping strontium aluminate long afterglow material is added to the structural color film.The long afterglow pattern is formed by mask method,and the film is etched with sodium hydroxide solution to prepare a composite anti-counterfeiting film composed of long afterglow and structural color with high stability.The results show that the photonic band gap of the surface photonic crystal structure is used to match the fluorescence band of the bottom’s pattern,the fluorescent pattern at the bottom can be displayed by scraping or wetting.At the same time,the surface structure can be quickly restored by wiping with ethanol and the fluorescent pattern can be hidden again,this method can enable the anti-counterfeiting label to be reused in a rewritable way.In addition,the corroding and bending tests show that the prepared films have strong robustness.

关 键 词：材料 结构色 防伪薄膜 长余辉材料 环氧树脂 可重写薄膜 

分 类 号：O436[机械工程—光学工程]