基于液态光子晶体固定化的柔性结构生色膜制备及其性能

Preparation and properties of flexible structural color film based on immobilization of liquid photonic crystals

针对光子晶体材料结构稳定性较差的问题,以光固化型单体取代常规组装介质水制备液态光子晶体,通过紫外光聚合固化构建纳米微球嵌入弹性体式的非密堆积阵列光子晶体,制备结构稳定的柔性光子晶体结构生色膜,并对其结构和性能进行分析。结果表明:液态光子晶体的光学性质可通过胶体体系中SiO 2纳米微球的体积分数及其粒径进行调控,随SiO 2体积分数由22%增大至40%,其微球间的平均间距逐渐减小,液态光子晶体结构色蓝移;固定SiO 2微球体积分数,当其粒径由123 nm增加至178 nm时,液态光子晶体结构色红移;液态光子晶体色彩鲜艳、饱和度高,经紫外光辐照后,所构建的固态光子晶体膜具有明显的虹彩效应和优异的柔韧性,并表现出显著的力致变色性能,展示了其在智能可穿戴纺织材料领域良好的应用潜能。

Aiming at the poor structural stability of photonic crystal materials,photo-curable flexible monomers were used to replace conventional assembly medium of water to prepare liquid photonic crystals.A non-close-packed photonic crystals array was built with SiO 2 nanospheres embedded in an elastomer polymerized by UV-curing,to produce a flexible photonic crystals film with structural stability.The optical properties of liquid photonic crystals were regulated and controlled by the volume fraction of SiO 2 nanospheres in the colloidal system and the particle size of SiO 2 nanospheres.It is revealed that as the volume fraction of SiO 2 nanospheres increases from 22%to 40%,the average spacing between the microspheres gradually decreases,and the structure color shifts to blue accordingly,while fixing the volume fraction of SiO 2 nanospheres causes the structural color shifts to red when increasing the particle size of SiO 2 nanospheres from 123 nm to 178 nm.The liquid photonic crystals show bright color with high saturation,and after ultraviolet irradiation the target product of solid photonic crystals film shows obvious iridescent effect and excellent flexibility.The results indicate excellent force-induced color change performance and a promising application potential in the field of smart wearable textile materials.