高分子/液晶复合材料中全息、荧光图像的构筑及温敏特性

实现全息图像与荧光图像的无串扰构筑及协同响应对于发展先进图像存储功能材料、维护国家安全和民生安全具有重要意义。本项目拟基于含有四苯乙烯(TPE)衍生物的高分子/液晶复合材料实现这一目的。设计合成系列TPE衍生物，并基于它们与液晶的协同作用调控复合材料的荧光行为和温度响应行为；引入多元硫醇并通过硫醇-烯烃点击反应调控TPE衍生物的空间分布。预期建立一种基于TPE衍生物的化学结构设计及TPE衍生物与液晶的协同作用调控全息高分子/液晶复合材料荧光颜色和响应温度的新方法，揭示TPE衍生物的空间分布对复合材料荧光行为、温度响应行为及荧光图像寿命周期的影响规律，制备系列衍射效率高、荧光颜色可调、响应温度可调、荧光图像寿命周期可控、全息图像与荧光图像协同响应的全息高分子/液晶复合材料。本项目的研究成果可为发展新型图像存储功能高分子材料及其安全防伪应用奠定理论基础，丰富结构功能一体化的高分子有序复合理论。

Crosstalk-free construction of holographic and fluorescent images in a single element and enabling their cooperative-response are of vital significance for developing advanced image-recording functional materials to ensure both the national and public security. To this end, the marriage of tetraphenylethylene (TPE) derivatives with the holographic polymer/liquid crystal (LC) composites is promising, which will be systematically investigated in this project. First, a series of TPE derivatives will be synthesized, and then they are going to be mixed with the LC to tune the fluorescence and thermoresponse behaviors of the composites through synergistic interactions. Second, the multi-thiol will be added, based on which the spatial distribution of the TPE derivatives in the composites will be finely tuned through thiol-ene click reaction. A new approach will be proposed to tune the fluorescence color and response temperature of the holographic polymer/LC composites through the chemical structure design of TPE derivatives and the synergy of TPE derivatives with the LC. The effect of the spatial distribution of the TPE derivatives on the composite fluorescence behaviors, thermal response and life cycle of the fluorescent images will be disclosed. Last, a new type of holographic polymer/LC composites will be fabricated that show a high diffraction efficiency, tunable fluorescence color, tunable response temperature and fluorescent images with controlled life cycle. In addition, crosstalk-free construction and cooperative-response of holographic and fluorescent images will be enabled in these holographic polymer/LC composites. The findings of this project are envisioned to provide a theoretical base to the development of image-recording functional polymer materials for security and anti-counterfeiting applications. They are also promising to enrich the composite theories for developing functional polymer composites in ordered structures.