向列相热致性液晶82832微驱动效果研究  

Study on the Micro-driving Effect of the Nematic Thermotropic Liquid Crystal 82832

作　　者：刘春波[1] 胡加辉 LIU Chunbo;HU Jiahui(College of Mechanical and Electrical Engineering,Henan University of Technology,Zhengzhou Henan 450001,China)

机构地区：[1]河南工业大学机电工程学院,河南郑州450001

出　　处：《机床与液压》2022年第2期17-20,共4页Machine Tool & Hydraulics

基　　金：国家自然科学基金面上项目(11372003);河南省高校科技人才项目(14HASTIT007)。

摘　　要：由于温度直接影响液晶材料的黏弹性与介电系数,进而影响驱动性能,有必要对其进行深入研究。以新型热致性液晶材料82832为研究对象,通过DSC试验确定其呈现液晶相的温度为48~118℃。以50、60、70℃为驱动温度,以扭转角0°、45°及90°为基本变量,对82832的驱动性能进行大量试验研究。结果表明:驱动速度随驱动电压的增大而增加,温度为60℃、扭转角为0°时,驱动速度得到最大值;通过改变所施加的驱动电压频率,对驱动效果进行再次验证,得到最佳驱动温度为60℃、最佳驱动频率为10 Hz。在前期研究基础上建立液晶82832数值研究的计算模型并进行理论计算,结果与试验结果吻合较好。研究结果为液晶引流微驱动方式的应用提供参考。Because the temperature directly affects the viscoelasticity and dielectric coefficient of the liquid crystalline materials, and then affects the driving performance, it is necessary to study it deeply. A new thermotropic liquid crystalline material 82832 was selected as the research object, and the temperature range of the 82832 was determined from 48 ℃ to 118 ℃ by DSC test. Taking 50,60,70 ℃ as the driving temperature, and the twist angles of 0°, 45°,90° as the basic variables, the driving performance of 82832 was studied. The results show that the driving speed increases with the increase of the driving voltage, and the maximum driving speed is obtained when the temperature is 60 ℃ and the torsion angle is 0°;by changing the applied driving voltage frequency, the driving effect is verified again, and the optimal driving temperature is 60 ℃ and the optimal driving frequency is 10 Hz. On the basis of the previous research, the numerical model of liquid crystal 82832 was established and the theoretical calculation was carried out, and the results were in good agreement with the experimental results. The results provide reference for the application of the liquid crystalline backflow micro-driving.

关 键 词：微流体驱动 液晶82832 DSC试验 驱动温度 

分 类 号：O373[理学—流体力学]