双光子驱动的形状记忆液晶聚氨酯基复合材料

The objectives of this project is to design, synthesize and fabricate a series of two-photon driven shape-memory liquid-crystalline polyurethane (SMLCPU) composite materials. Firstly, chromophores with two-photon absorption properties were synthesized, which was elegantly introduced into SMLCPU systems by physical blending, supramolecular hydrogen bonding and directly copolymerization. The shape-memory behaviors of the fabricated materials will be investigated by structural analysis, thermal analysis, microscopic techniques, mechanical measurement and other modern analytical methods. Then we will study the influence of soft/hard segment ratio in polyurethane, the ratio and dispersion of two-photon chromophores in the composite materials, molecular structure, liquid-crystalline self-organization on the two-photon driven shape-memory behaviors to reveal the relationship between materials performance with molecular design and material structure fabrication. Quick two-photon responsive SMLCPU composite materials with stable structure and homogenous dispersion will be obtained. Based on these results, the potential applications in remote, non-contact and precise control of deformation and device will be investigated. This project will lead to research works with significant impact in the international scientific community as well as creative research achievements with our own rights of intellectual property.

本项目旨在设计、合成和组装一系列具有双光子驱动性能的形状记忆液晶聚氨酯复合材料。首先合成具有良好双光子吸收性能的生色团染料，并以物理共混、氢键超分子组装以及线性共聚等方法，将其引入到形状记忆液晶聚氨酯体系中。通过各种结构分析、热分析、微纳显微技术、力学分析等多种现代测试技术系统地研究这些材料的形状记忆行为，研究聚氨酯材料中软硬段组分、双光子生色团的比例与分布、分子结构、液晶自组装等之间的作用规律对于双光子驱动形状记忆行为的影响，并探索分子设计、结构设计与材料性能之间的关系，以获得具有快速双光子响应且结构稳定、分散均匀的形状记忆液晶聚氨酯复合材料。探讨它们在远程、非接触且精确控制材料形变与器件应用的可能性。通过本项目的实施，将做出一批在国际上具有重要影响的研究工作，并获得原创性的具有自主知识产权的研究成果。

本项目旨在设计、合成和组装一系列具有双光子驱动性能的形状记忆液晶聚氨酯复合材料。首先合成具有良好双光子吸收性能的生色团染料，并以物理共混、氢键超分子组装以及线性共聚等方法，将其引入到形状记忆液晶聚氨酯体系中。通过各种结构分析、热分析、微纳显微技术、力学分析等多种现代测试技术系统地研究这些材料的形状记忆行为，研究聚氨酯材料中软硬段组分、双光子生色团的比例与分布、分子结构、液晶自组装等之间的作用规律对于双光子驱动形状记忆行为的影响，并探索分子设计、结构设计与材料性能之间的关系，以获得具有快速双光子响应且结构稳定、分散均匀的形状记忆液晶聚氨酯复合材料。探讨它们在远程、非接触且精确控制材料形变与器件应用的可能性。通过本项目的实施，以通讯作者发表SCI索引论文34篇，其中影响因子大于9的论文13篇；取得一批具有自主知识产权的创新成果，授权国家发明专利1项。培养博士生6人，并广泛地开展国内和国际外合作，扩大了在此领域的国际影响。