不同温度下溶剂诱导相分离法对聚合分散液晶膜的光学性能影响  

Effect of Solvent Volatilization Temperature on Optical Properties of Polymerized Dispersed Liquid Crystal Films

作　　者：何景婷 冯中营 刘晓菲 段晓丽 HE Jing-ting;FENG Zhong-ying;LIU Xiao-fei;DUAN Xiao-i(Department of Science,Taiyuan Institute of Technology,Taiyuan 030008,China)

机构地区：[1]太原工业学院理学系,太原030008

出　　处：《武汉理工大学学报》2024年第4期19-23,共5页Journal of Wuhan University of Technology

基　　金：山西省自由探索项目(山西省科技攻关计划)(202203021222284)。

摘　　要：采用不同温度下溶剂诱导相分离法制备聚合物分散液晶膜(PDLC),用SEM表征了样品的形貌,用紫外可见分光光度计研究了样品的光学性能,用振动样品磁强计研究了样品的磁化曲线。结果表明:固化温度控制在液晶5CB的相变序Cr-24℃-N-35.5℃-I范围内时,能显著抑制相分离过程中液晶微滴的汇聚。其中,当固化温度在25~35.5℃缓慢变化过程时,形成的液晶微滴尺寸细小均匀。PDLC膜的阈值电压(Vth)、饱和电压(Vsat)和对比度(CR)上升,关态透过率(Toff)下降,开态透过率(Ton)上升。平均磁矩显著增加,电光性能和磁光性能显著提高。Preparation of polymer dispersed liquid crystal membranes using solvent induced phase separation method at different temperatures.The morphology of the samples was characterized by SEM,the optical properties of the samples were studied by UV-Vis spectrophotometer,and the magnetization curves of the samples were studied by VSM.The re-sults show that when the curing temperature is controlled within the range of Cr-24 C-N-35.5 C-I of the phase transition order of liquid crystal 5CB,the convergence of liquid crystal droplets during the phase separation process can be signifi-cantly suppressed.Among them,when the curing temperature is slowly changing between 25 C and 35.5 C,the formed liquid crystal droplets are fine and uniform.The threshold voltage(Vth),saturation voltage(Vsat)and contrast(CR)of the PDLC films increased,the off-state transmittance(Tor)decreased,and the on-state transmittance(Ton)increased.The average magnetic moment is significantly increased,and the electro-optical properties and magneto-optical performance is significantly improved.

关 键 词：聚合物分散液晶膜(PDLC) 磁化曲线 电光性能 磁光性能 

分 类 号：O647[理学—物理化学]