Liquid Crystal Alignment Control Using Polymer Filament and Polymer Layers Coated on Substrates
Liquid Crystal Alignment Control Using Polymer Filament and Polymer Layers Coated on Substrates
复制标题
使用聚合物丝和涂覆在基板上的聚合物层进行液晶取向控制
DOI：
10.1143/jjap.44.1862
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发表时间：
2005
影响因子：
1.5
通讯作者：
F. Sato
中科院分区：
文献类型：
--
作者：
T. Murashige;H. Fujikake;Hiroto Sato;H. Kikuchi;T. Kurita;F. Sato
我们研究了液晶盒中的液晶(LC)取向，其中含有排列好的纤维素丝，中间夹着覆盖在衬底上的薄聚合物层。采用聚苯乙烯(PS)、聚乙烯醇(PVA)和聚酰亚胺(PI)三种聚合物材料作为聚合物层。在纤维两侧诱导的LC取向面积较大，顺序为PS、PVA、PI。在PS层的情况下，在垂直于聚合物灯丝的方向上，平均LC取向面积达到约100微米。认为液晶和PS层之间的分子相互作用很弱，不会因为聚合物纤维的存在而干扰液晶的取向。另一方面，摩擦的PS层被用作液晶盒的聚合层，其中摩擦的PS层诱导的LC取向方向垂直于聚合物丝。研究发现，聚合物纤维附近的液晶取向在晶胞平面内逐渐弯曲。结果表明，聚合物纤维与基片表面的结合可以实现各种三维液晶的对准。
We investigated liquid crystal (LC) alignment in LC cells containing an aligned cellulose filament sandwiched by thin polymer layers coated on substrates. Three types of polymer material, namely polystyrene (PS), polyvinyl alcohol (PVA) and polyimide (PI), were used as polymer layers. LC alignment areas induced on both sides of the filament were large in the order of PS, PVA and PI. In the case of the PS layer, the average LC alignment area reached approximately 100 µm in the direction perpendicular to the polymer filament. The molecular interaction between the LC and the PS layer is thought to be weak and it does not disturb the LC alignment due to the polymer filament. On the other hand, rubbed PS layers were used as polymer layers of the LC cell, where the LC alignment direction induced by the rubbed PS layer was perpendicular to the polymer filament. It was found that the LC alignment near the polymer filament gradually bent in the cell plane. The result suggests that various three-dimensional LC alignments can be realized by the combination of the polymer filament and substrate surface.