高分子分散蓝相液晶/纳米粒子显示材料的制备与电光性能研究

本项目将首先从单体液晶的分子结构设计入手，合成系列有利于稳定液晶蓝相的单体液晶，然后将这些单体液晶进行共混来获得液晶材料，研究液晶材料的蓝相温域和蓝相的电光性能与单体液晶的分子结构及其组成的关系,制备宽温域的室温蓝相液晶材料。其次，制备一系列纳米粒子，调制蓝相液晶/纳米粒子混合物，研究纳米粒子种类、含量、粒径和形貌对蓝相液晶的电光性能的影响规律。最后，采用具有合适的分子结构的光聚合单体，使用上述纳米掺杂液晶材料，构筑高分子分散蓝相液晶/纳米粒子材料体系，研究纳米粒子的种类、粒径、形貌、含量及表面修饰方法、高分子基体分子结构、微结构、蓝相液晶的物性等参数对材料的电光性能的协同作用。在上述研究的基础上，本项目将探索新型蓝相液晶材料体系的分子设计与制备方法，为发展兼具宽温域、低驱动电压、无电光迟滞特性及高电场稳定性的实用蓝相液晶显示材料提供理论和实验指导。

In this project, the method to design the molecular structures of the compounds easy to form the blue phases (BPs) will be studied and a series of the compounds will be synthsized. Then, the relationships between the temperature ranges and the electro-optical properties of the BPs of the liquid crystal (LC) materials prepared by mixing the compounds and the molecular structures together with the compositions of the compounds will be investigated to obtain a BP-LC material with a wide temperature range at a room temperature. Then, a series of nanoparticles (NPs) will be prepared to obtain BP-LC/NPs composites, and the effects of the NPs with different types, sizes, morphologies and surface-modification methods on the electro-optical properties of the BP-LC will be explored. At last, polymer dispersed BP-LC/NPs materials will be prepared by using some photopolymerizable monomers with suitable molecular structures, and the synergistic effects of the NPs with different types, sizes, morphologies and surface-modification methods, the molecular structures and the micro structures of the polymer matrix, and the physical parameters of the BP-LC on the electro-optical properties of the materials will be explored. Based on the above researches, the molecular design and the preparation methods of novel BP-LC material systems will be developed, to provide experimental foundation and theoretical guidance for preparing an applied BP-LC display material with a wide room temperature range, a low driving voltage, free hysteresis and high stability under an electric field.