含光电功能基元的新型自愈合材料的设计制备与应用

Self-healing materials can autonomously repair physical damage and extend the service life, which has aroused great interest of researchers. The development of new self-healing materials and the expansion of their functions are two main research contents. However, due to the limitations of research tools and conditions, there is still no effective verification of the microdynamic process of self-healing.In addition, although self-healing materials are constantly being developed, their functions and applications are limited.Therefore, this project intends to design and synthesize aggregation induced emission (AIE) molecules containing functional groups, which will be used as fluorescent probes to combine with self-healing materials to study the micro-dynamic process of self-healing materials in situ. It is intended to develop functional self-healing materials for anti-counterfeiting and security application, which are colorless and transparent under day light and emit fluorescence under UV light. It is proposed to design and synthesize donor-accepter (D-A) molecules containing functional groups and combine them with self-healing materials to develop self-healing functional materials for fabricating nano-generators with the ability of generating and fixing electric charges efficiently. This project aims to comprehensively study self-healing functional materials from microdynamics to macroscopic functionalization by combining molecular design, material preparation and performance testing, which will be benifit for enriching the types, expanding the functions and applications, then promoting the development of the research field of self-healing materials.

自愈合材料能够自主修复物理损伤，延长使用寿命，引起了科研工作者的极大兴趣，研究集中在新型自愈合材料的开发和功能的拓展。然而，受限于研究工具及条件，对自愈合的微观动力学过程尚缺乏有效的验证；此外，自愈合材料虽然不断被开发，但其功能和应用领域有限。因此，本项目拟设计合成含有功能基团的聚集态诱导发光（AIE）分子，作为荧光探针与自愈合材料相结合，通过荧光技术原位研究自愈合材料的微观动力学过程，理解自愈合材料的机制；拟开发日光下无色透明，紫外光激发下发射荧光的自愈合功能材料，并用于荧光防伪信息安全等方面；拟设计合成含有功能基团的给-受体（D-A）分子，并与自愈合材料结合，开发用于纳米发电机的高效产生电荷和固定电荷的自愈合功能材料。本项目旨在结合分子设计、材料制备和性能测试，从微观动力学到宏观功能化，全面研究自愈合功能材料，丰富自愈合材料的种类，拓展其功能和应用，促进自愈合材料研究领域的发展。

随着信息技术的进步和经济的发展，食品、医药、服装、通讯等领域对防伪提出了新的要求。荧光防伪技术因具有高亮度、高对比度、快速响应、灵活可调的光物理性质等特点而备受关注。本项目合成出了含醛基官能团的可见至近红外发光的AIE分子及D-π-A-π-D共轭分子；探索了分子的光物理性能及其内在机制，建立了分子构效关系；将含醛基官能团的AIE荧光探针与自愈合材料结合，通过荧光技术可视化自愈合凝胶的微观动力学过程，总结出了自愈合材料的微观机制；将各类性质的AIE分子分别与自愈合凝胶材料、Janus结构的静电纺丝纳米纤维材料、核-壳结构的自稳定沉淀纳米微球材料结合，调控材料的发光颜色，获得白光聚合物材料；利用分子的AIE分子对聚集环境的独特的响应性能实现其在在荧光防伪信息安全方面的应用。本项目新型荧光材料的研究和开发对荧光防伪领域的发展具有重要的意义。