基于电流体动力学的微液滴喷印系统  

Micro⁃droplets printing system based on electrohydrodynamics

作　　者：夏睦威 刘威[1] XIA Muwei;LIU Wei(School of Physics and Technology,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学物理科学与技术学院,湖北武汉430072

出　　处：《电子设计工程》2022年第12期38-42,47,共6页Electronic Design Engineering

基　　金：武汉市应用基础前沿项目(2019010701011386)。

摘　　要：微液滴在生物、化学、材料科学等领域的应用十分广泛。针对当前喷印液滴方法在液滴稳定性、均匀性、单分散性等方面存在的不足,设计一种基于电流体动力学的微液滴喷印系统。该系统采用压力提供装置将针管中的原料试剂挤压成液滴悬挂在针头处。通过高压发生装置和下电极板提供电场,在电场的作用下,针头上的液滴被分散成大量微小液滴,并被收集于下电极板表面,实现微液滴的喷印。实验过程中,通过显微相机观察微液滴的喷印情况,通过自行设计的操作页面控制XY平台,进而控制微液滴的喷印位置。实验表明,该系统在使用内径90μm喷头的情况下,能喷印直径为30μm左右的微液滴,实现了微液滴的喷印功能,满足应用需求。Micro⁃droplets are widely used in biology,chemistry,materials science and other fields.Aiming at the shortcomings of current droplet printing methods in terms of droplet stability,uniformity,and monodispersity,a micro⁃droplets printing system based on electrohydrodynamics is designed.The micro⁃fluidicsystem uses a pressure providing device to squeeze the raw reagents in the needle tube into droplets and hang on the needle.The electric field is provided by the high⁃voltage generating device and the bottom electrode plate.Under the action of the electric field,the liquid droplets on the needle are dispersed into a large number of tiny droplets and collected on the surface of the bottom electrode plate,achieve printing of micro⁃droplets.During the experiment,observe the printing of micro⁃droplets through a microscope camera,page designed by operating XY platform control can control the position of the droplet of printing.Experiments have shown that the system can print micro⁃droplets with a diameter of about 30μm when using a nozzle with an inner diameter of 90μm,realizes the printing function of micro⁃droplets to meet application requirements.

关 键 词：微液滴 电流体动力学 微流控系统 XY平台 

分 类 号：TN702[电子电信—电路与系统]