预聚物对聚合物分散液晶薄膜形貌及电光性能的影响

Influence of prepolymer on the morphology and electro-optical properties of polymer dispersed liquid crystal films

聚合物分散液晶(PDLC)作为新型显示材料,简单的制备工艺和较高的性能使其在光电显示领域占据重要地位,受到广泛的关注与研究。构成PDLC的液晶分子与预聚物的种类和含量是调控PDLC微观形貌和电光性能的重要因素。分散在聚合物网络中的液晶微滴尺寸影响着PDLC的驱动电压,而聚合单体的选用则直接影响液晶微滴的大小。本文根据预聚物的不同种类主要综述了(甲基)丙烯酸酯类单体、硫醇/聚硫醇类单体以及常用掺杂剂作为聚合物组成成分时对PDLC微观形貌以及驱动电压和对比度的影响,详细解释了聚合物网络对液晶微滴形貌造成的改变,进而影响电光性能的过程。

Polymer dispersion liquid crystal(PDLC),as a new type of display material,simple preparation process and high performance,make it occupy an important position in the field of optoelectronic display,and has received wide attention and research.The type and content of liquid crystal molecules and prepolymers are crucial to modulate the microscopic morphology and electro-optical properties of PDLC.The size of liquid crystal droplets dispersed in the polymer network affects the driving voltage of PDLC,while the selection of polymeric monomers directly affects the size of liquid crystal droplets.The effects of(meth)acrylate monomers,thiol/polythiol monomers,and the common additives as polymer components on the PDLC microscopic morphology as well as the driving voltage and contrast are mainly reviewed in this paper according to the different types of prepolymers.And the process of variation of liquid crystal micro-drop morphology caused by polymer networks,which in turn affects electro-optical properties,is explained in detail.