聚合物稳定蓝相液晶中温度控制对晶格结构的影响OA
Lattice structure based on temperature control in polymer-stabilized blue phase liquid crystals
蓝相液晶具有许多优异的光学特性,如快速的响应速度(亚毫秒量级)、可见光范围的布拉格反射、光学各向同性等,同时聚合物稳定蓝相液晶极大地扩展了其温度范围,使得蓝相液晶在电光器件领域有着广泛的应用前景.然而,聚合作用中光致异构化会扰乱液晶分子的排列,使原本取向均匀的蓝相液晶缺陷增加,晶格质量下降.本文研究了温度控制对聚合作用中光致异构化和晶格结构的影响,测试了聚合前后蓝相液晶的晶格常数与温度变化之间的关系.根据温度特性,在3个温度区间进行聚合,研究了不同温度下的晶格结构.实验结果表明,聚合物的加入促使液晶蓝相Ⅰ的晶格常数在整个温度区间内发生非连续性的约40nm的跃变.避免在温域的中间段进行聚合可以有效防止晶格结构畸变和光谱展宽.
Blue phase liquid crystals(BPLCs)possess several extraordinary optical properties,such as fast response time(sub-milliseconds),Bragg reflection in visible range,optical isotropic property.Meanwhile,polymer-stabilized blue phases LC(PSBPLCs)expanded the temperature range of BPLCs,which makes PSBPLCs have a good application in electro-optical devices.However,photoisomerization perturbs the arrangement of liquid crystal molecules,which induces defects in lattice structures.Herein,we introduce temperature control in photo polymerization.Pure liquid crystal samples and unpolymerized samples of BPLC are tested to find out the relationship between temperature and lattice constants.Based on temperature properties,lattice structures are observed at three different temperature region.Experimental results indicate that the lattice constants of blue phase Ⅰ(BPⅠ)change discretely(about 40 nm)after introducing liquid crystal polymer.Therefore,polymerizing in addition to mid-temperature region could avoid distortion of lattice structures and broadening of spectrum.
杨鑫雨;桑树;续晓婉
沈阳理工大学 光电信息科学与工程系,辽宁 沈阳 110159沈阳理工大学 光电信息科学与工程系,辽宁 沈阳 110159沈阳理工大学 光电信息科学与工程系,辽宁 沈阳 110159
数理科学
聚合物稳定蓝相液晶晶格结构温度控制
polymer-stabilized blue phase liquid crystalslattice structuretemperature control
《液晶与显示》 2026 (2)
171-176,6
辽宁省教育厅项目(No.LJ212510144038)国家自然科学基金(No.62541512)Supported by Education Department Project of Liaoning Province(No.LJ212510144038)National Natural Science Foundation of China(No.62541512)
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