Analysis of factors influencing about the effects of the liquid crystal micro fluid drive

Abstract

The liquid crystal microfluid drive is a fast-growing field with potential breakthroughs. In this paper, the microdrive experimental platform and the simulation platform were designed. The influence of drive parameters (electric field strength and frequency) and material parameters (stretching elastic constant, bending elastic constant and viscosity coefficient) on the microdrive effect of liquid crystal was explored. The drive parameters mainly affect the tilt angle range of dielectric molecules. When the tilt angle of the molecule approaches 90°, 4'-(Octyloxy)-4-biphenylcarbonitrile liquid crystal material has the maximum drive speed which can reach 19 µm/s. Among the three medium materials studied, the material 4'-(Octyloxy)-4-biphenylcarbonitrile with a small viscosity coefficient, small elastic coefficient and medium dielectric anisotropy coefficient has the best drive effect. The viscosity coefficient and the dielectric coefficient have a great influence on the drive performance. This research conclusion will lay a theoretical foundation for the synthesis of medium materials driven by liquid crystal microfluid.