Preparation of Multiple Response Inverse Opal Structured Color Film and Its Anti-Counterfeiting Properties
Counterfeiting phenomena are emerging and causing serious negative impacts on individuals and socio-economics,and the development of new multiple anti-counterfeiting materials is an effective way to solve this problem.Silica microspheres with different particle sizes were prepared by the seed growth method,and photonic crystal structural colour films were prepared by the impregnation lift-off method.After the patterns were etched out by using laser,the films were filled with acrylate light-curing polymers and fluorescent dyes were introduced into the system,and a multilayered inverse opal structural anticounterfeiting film composite of structural colours and fluorescent dyes was finally prepared.The results show that the structural colour film shows different colours on the front and back patterns respectively,with bright and saturated colours,good angle dependence,and the change of pattern colours can be achieved rapidly by simple methods such as ethanol wetting and UV irradiation,and has good reproducibility and tensile resistance.
NETL
NSTL
万方数据
