外场精确调控制备宽波段光屏蔽薄膜材料

合成随温度变化螺旋扭曲力急剧变化的手性化合物。调制手性化合物/向列相液晶/自由基聚合单体/阳离子聚合单体/引发剂复合体系，采用紫外自由基聚合和阳离子聚合协同聚合的方式制备手征性向列相（N*相）液晶/高分子网络复合材料，以及调制手性化合物/向列相液晶/自由基聚合单体/阳离子聚合单体/自由基引发剂/阳离子引发剂复合体系，采用紫外自由基聚合和阳离子聚合分步聚合的方式制备N*相液晶/高分子网络复合材料。研究紫外光照射强度、时间以及温度对高分子网络的微观结构、N*相液晶的螺距大小及螺距微区分布的影响，探索N*相液晶螺距非均匀分布的调控方法及机理，进一步研究复合材料的组成、高分子网络的微观结构、N*相液晶的螺距大小及螺距微区分布对光屏蔽薄膜材料反射波长和反射波宽范围的影响，探索通过热、光外场精确调控制备可应用于不同波段要求的宽波段光屏蔽薄膜材料的方法。

Chiral compounds that helical twist power can rapid change with the change of temperature will be synthesized. Chiral compounds/nematic liquid crystals/free radical polymerizable monomers/cationic polymerizable monomers/initiator will be prepared, and chiral nematic liquid crystals/polymer network composites will form from synergic action of free redical polymer and cationic polymer.Chiral compounds/nematic liquid crystals/free radical polymerizable monomers/cationic polymerizable monomers/free radical initiator/cationic initiator will be prepared, and chiral nematic liquid crystals/polymer network composites will form from stepping action of free redical polymer and cationic polymer.The influences of ultraviolet irradiation intensity， time and temperature on the microstructure of polymer network, helical pitch and microdistribution of helical pitch will be investigated, to explore the method and mechanism of helical pitch nonuniform distribution of chiral nematic liquid crystals. Furthermore, the influences of the composition of composites, the microstructure of polymer network and the helical pitch and microdistribution of helical pitch on the reflection wavelength and wavelength range of light shielding film will be investigated, to explore the method of preparing broadband light shielding film for different requirement of wavelength range by accuracy control of thermo-optical outfield.