一种测量液滴接触角的方法  

A Method for Measuring Contact Angles of Droplets

作　　者：陈陶[1,2] 胡晨晨[1] 方圆[1,2] 梁忠诚[1,2] 

机构地区：[1]南京邮电大学微流控光学技术研究中心,江苏南京210023 [2]南京邮电大学光电工程学院,江苏南京210023

出　　处：《激光与光电子学进展》2017年第8期289-293,共5页Laser & Optoelectronics Progress

基　　金：江苏省科技型中小企业技术创新基金资助项目(BC2014138)

摘　　要：采用垂直拍摄-测量直径法代替传统的侧面拍摄-提取轮廓-函数拟合求导法测量液滴接触角,省去了函数拟合过程,提高了测量效率。推导出液滴接触角的理论计算公式,利用计算机结合图像处理技术提取出液滴投影图像的边缘轮廓,测量得到边缘的直径,将其代入所推导出的理论公式求解出液滴接触角。实验获得了与理论计算一致的导电液滴接触角随电压变化的关系曲线,验证了该方法的可行性。The contact angles of droplets are measured by using the vertical shooting-diameter measurement method instead of the traditional lateral shooting-contour extraction-function fitting method. The measuring efficiency is improved because the process of function fitting is omitted. The theoretical formula for contact angles is derived. With the combination of computer with image processing technology, the edge contours of projected images of droplets are extracted and the diameters of these edges are measured. By substituting the diameter value into the derived theoretical formula, the contact angles of droplets are obtained. The relation curves of contact angle versus applied voltage obtained by the experiment and theoretical calculation are consistent, which confirms the feasibility of this proposed method.

关 键 词：表面光学 微流控 液滴接触角 垂直拍摄 直径测量 

分 类 号：TN2[电子电信—物理电子学] O43[机械工程—光学工程]