基于对映体分子调控的纸基微纳光学结构构筑机制研究

可自发控制材料表面光学信息的纳米纤维素(NCC)光子晶体纸基近年来成为光学材料领域的研究热点。然而，NCC晶体的无规则聚集和液晶相螺旋结构复杂多变导致的材料表面光学信息不确定性，影响了该类纸基材料的实际应用。本项目针对影响NCC液晶相螺旋结构的关键要素，以构筑纸基有序的微纳光学结构为导向，采用乳酸对映体对NCC分子进行诱导调控，深入研究过程中NCC组装体分子结构和螺旋结构的演化规律，通过量子化学模拟以及光子传输矩阵模型的构建解析对映体分子作用下NCC组装体分子结构、螺旋结构和微纳光学结构间的内在关联，深刻理解分子诱导作用改变NCC晶体空间构象、几何扭转以及螺距的本质原因，建立精准控制光子晶体纸基表面光学信息传输的有效方法，为开发兼具显示性能和光学稳定性的新型光子晶体纸基提供理论基础和技术指导。

Owning to the characteristics of spontaneous transmitting the optical information, nanocrystalline cellulose (NCC) based liquid crystal paper material is becoming a research focus in optical material fields. However, the inconclusive optical information on the materials from the irregular deposition and the complicated chiral nematic phase of NCC limits their application range. Understanding the process of orderly arrangement and regular modulation of NCC’s liquid crystal phase can expand the application. In order to understand the mechanism of optical information transmission, we plan to reveal the generation and transmission behavior of optical state information on the paper via systematically investigating the enantiomer molecular regulation. Accordingly, the corresponding reaction mechanism and the assembly method of molecular-induced NCC will be determined by theoretical calculation and mathematical equation simulation analysis. The relationship among molecular structure, helical structure and micro/nano optical structure of chiral nematic liquid crystals can be investigated. Furthermore, we will understand the key control nodes of spatial conformation, geometric twist and pitch changes of NCC’s chiral nematic helical structure based on the enantiomer molecular regulation. This program aims to elucidate the pathways of NCC’ chiral helical structure and key regulatory mechanisms of micro/nano optical structure during the paper making process. Based on the proposed strategies for controlling the helical structure behavior, the research results are able to deeply understand the formation mechanism of chiral nematic phase in nature. Furthermore, the construction method will be used to develop novel chiral liquid crystal materials based on micro/nano structure design.