液晶与显示, 2010, 25 (1): 49, 网络出版: 2010-03-24
表面活性剂对聚合物分散液晶光电性能的影响
Effect of Surfactant on Electro-Optical Property of Polymer Dispersed Liquid Crystal
聚合物分散液晶 表面活性剂 硬脂酸 界面作用 锚定能 polymer dispersed liquid crystal surfactant stearic acid anchoring energy
摘要
为了调控聚合物分散液晶(PDLC)中聚合物基体和液晶微滴的界面作用,降低锚定能,以聚丙烯酸甲酯(PMA)为基体,E7为分散相,并加入了不同含量的硬脂酸(SA)表面活性剂,采用聚合物诱导相分离法制备了PDLC,并对PDLC的光电性能进行了测试。研究发现,PDLC的电光性能随着SA含量的增加而改善,但当SA的含量达到一定值后,液晶微滴出现“岛聚”现象,光电曲线出现一个转折点。实验结果表明,表面活性剂可以调控聚合物和液晶微滴的界面作用,降低锚定能,从而改善PDLC的光电性能。
Abstract
Polymer dispersed liquid crystal (PDLC) is a kind of new display material. It has a lot of advantages. Anchoring energy,as an important factor of PDLC,has a great influence on electro-optical properties. In this letter,a small amount of stearic acid (SA) was added into PDLC. With the increase of SA,the anchoring energy was reduced,which leads to a reduction in driving voltages and an improvement in the ON state transmittance. However,the ON state transmittance decreased when the concentration of SA exceeded 0.5%. Besides,with the decrease of anchoring energy,the hysteresis increased. It demonstrated that SA do reduced the anchoring energy and improved electro-optical properties of PDLC.
张凯, 杜鑫, 李儒, 阎斌, 汪映寒. 表面活性剂对聚合物分散液晶光电性能的影响[J]. 液晶与显示, 2010, 25(1): 49. ZHANG Kai, DU Xin, LI Ru, YAN Bin, WANG Ying-han. Effect of Surfactant on Electro-Optical Property of Polymer Dispersed Liquid Crystal[J]. Chinese Journal of Liquid Crystals and Displays, 2010, 25(1): 49.