宽温域、低驱动电压及无电光迟滞特性的纳米粒子/蓝相液晶复合材料的制备及性能研究

项目名称： 宽温域、低驱动电压及无电光迟滞特性的纳米粒子/蓝相液晶复合材料的制备及性能研究

项目编号： No.51272026

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 肖久梅

作者单位： 北京科技大学

项目金额： 80万元

中文摘要： 本课题拟系统地合成一系列不同粒径和形貌的无机纳米粒子，并通过使用表面修饰剂或物理包覆有机化合物的方法来对其进行表面修饰；然后将所制备的纳米粒子分散到母体蓝相液晶中，从而制备纳米粒子/蓝相液晶复合材料。研究纳米粒子的种类、粒径、形貌、含量和表面修饰方法对纳米粒子在蓝相液晶中分散性的影响规律、对复合体系的蓝相温域、Kerr系数、各向介电常数、折射率、螺距、粘度和弹性常数等参数以及其电光性能的影响规律，探索纳米粒子对复合体系的蓝相温域或电光性能的影响机理，为开发同时兼具宽温域、低驱动电压及无电光迟滞特性的实用型蓝相液晶显示材料提供实验数据和理论指导。

中文关键词： 液晶；蓝相；纳米粒子；温域；电光性能

英文摘要： A series of inorganic nanoparticles (NPs) with different sizes and morphologies were prepared systematically, and modified by using surface-modification method such as Chemical or Physical Modification. Then, the NPs will be dispersed into blue phase (BP) liquid crystal (LC) to prepare NPs/BP-LC composite materials, to explore the effects of different types of NPs, the sizes, the morphologies and surface-modification methods on the dispersity of the NPs in the BP-LC host, on the temperature range,Kerr constant, the dielectric constant, the birefringence, the pitch length of the helical structure,the viscosity, the elastic constant and on the electro-optical performance of the BP. Furthermore, the mechanism for the NPs to extend the temperature range and improve electro-optical performance will be elucidated to provide experimental foundation and theoretical guidance for developing the BP-LC composites with wide temperature range, low driving voltage and free hysteresis in areas of display as well as electro-optical devices.

英文关键词： Liquid Crystal；Blue Phase；Nanopartical；Temperature Range；Electro-Optical Properties