超疏水表面的可回复电润湿机理及器件研究

项目名称： 超疏水表面的可回复电润湿机理及器件研究

项目编号： No.61306140

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 吴俊

作者单位： 东南大学

项目金额： 25万元

中文摘要： 介质材料电润湿(EWOD)技术在电子信息、生物医疗、精密光学等领域具有非常广阔的应用前景。流体迟滞力以及接触角饱和是高性能EWOD器件的主要制约因素。本项目将对具有减迟滞特性的超疏水(SHoP)表面EWOD效应展开深入的应用基础研究，为新型超高速流体浸润性、大动态范围的EWOD器件提供理论基础。针对SHoP表面浸润性调整的不可回复性、以及EWOD功能与减迟滞功能的兼容性等问题，提出利用复合SHoP表面使EWOD功能与减迟滞功能SHoP表面分离的新方法。借助三相接触线(TCL)在条状结构间隙的可回复位移特性，实现EWOD在SHoP表面浸润性的大范围可回复调整，利用非浸润态SHoP表面的减迟滞特性，提高TCL的位移速率。此项研究对深入了解微观浸润特性具有显著科学研究意义，对充分利用SHoP表面以及EWOD效应对微流体操控的各种优势具有重要的实际应用价值。

中文关键词： 微流体技术；超疏水；喷墨打印；表面浸润特性；

英文摘要： Electrowetting on dielectric (EWOD) is widely used in electronic information,biomedical device and precision optics, however, the development of this technology is suffering from the technical issues of hysteresis on solid/fluid interface and contact angle saturation. This project aims at investigating of novel EWOD technology characterized by fast response time, reversible and wider range of wetability variation. The research contents will be on the study of EWOD performance on superhydrophobic（SHoP）surfaces, which feature good drag reduction property.The key scientific problems of this project are the compatobility problem for drag reduction performance by SHoP surface in EWOD device, and also the irreversibility issue between different SHoP wetting states.We proposed a novel multi-SHoP surface to both achieve reversible wetting states change by EWOD and perserve the drag reduction function.The reversible wetting states change can be achieved on SHoP surface due to the energy barrier-free path for TCL movement along the microgrooves, meanwhile, the drag reduction function is perserved because the SHoP surface is in a stable Cassie state in this multi-SHoP surface even it is on a EWOD device.This investigation is quite meaningful to help us to understand the wetting behavior in microscale, and also to help us t

英文关键词： Micro fluid technology；super hydrophobic；inkjet printing；surface infiltration characteristics；