基于压力超疏水表面润湿性调控技术及对微通道界面阻力影响的研究

项目名称： 基于压力超疏水表面润湿性调控技术及对微通道界面阻力影响的研究

项目编号： No.51275064

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 机械、仪表工业

项目作者： 张会臣

作者单位： 大连海事大学

项目金额： 80万元

中文摘要： 本项目针对微通道中流体运动的特定条件，以实现微通道内流体运动可调控为研究目标。采用反应刻蚀技术在硅基体上刻蚀加工微米尺度的微结构和气体通道，采用自组装技术对加工构件进行改性，构建超疏水表面。在PDMS基底上加工微米尺度液体微通道和气体微通道，采用键合的方法制备具有超疏水底面的微通道构件，通过调节气体压力，改变液体在超疏水表面的接触形式，调控超疏水表面的润湿性。搭建微通道中流体运动特性测试实验台和测试系统，改变工况条件，通过μ-PIV测试流体的运动速度，评价不同固液界面的滑移和阻力特性。分别采用分子动力学、介观数值模拟和流体动力学数值模拟的方法对界面滑移和微通道中流体的运动特性进行分析，优化气体微通道和液体微通道及其连接方式的设计，建立具有可调控流体运动微通道设计的准则。以此完善超疏水表面润湿性调控技术及其在微通道中流体运动控制中的应用，为微流体系统的设计、制造及应用提供理论依据和技术支持。

中文关键词： 超疏水；润湿性；微通道；界面；阻力

英文摘要： Aim to adjust and control fluid movement in microchannel in its special condition, themicrostructure　and gas transport microchannel are etched on silicon base in microscale by reactive ion etched technique. Superhydrophobic surface on above specimens is prepared by self-assembled monolayer technique. Liquid and gas microchannels in microscale are machined on PDMS bases. Microchannel component with superhydrophobic base surface is prepared by bonding method. The wettibility of superhydrophobic surface is adjusted by changing the contact of liquid on superhydrophobic surface with gas pressure adjustment. Test table and measurement system to evaluate the characteristics of fluid movement are set up. Interface slip and drag in different solid/liquid interfaces are analysed by velocity measurement of fluid with μ-PIV in various working conditions. The interface slip and characteristics of fluid movement in microchannel are theoretically expounded by molecular dynamics, mesoscopic numerical simulation and computational fluid dynamics. Fluid and gas microchannels and their connected mode are optimized. The design rules of microchannel with controlled fluid movement are proposed. After above research, the adjusting and controlling techniques for wettibility on superhydrophbic surface are improved, and their application

英文关键词： superhydrophobicity；wettability；microchannel；interface；drag