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目前,织构化表面与液体流动行为间相互关系已成为摩擦减阻、微反应器等交叉研究领域热点,如何预测并主动控制液滴运动行为是设计与构建低摩擦表面与高效微反应器的首要问题.采用光刻法制备了织构化表面,并以动态接触角法表征了热织构化表面上单相态液滴的界面润湿性与表面温度之间关系,探索了织构化表面轮廓与温度对液滴润湿状态的控制方式.研究表明,液滴Leidenfrost温度随织构化表面轮廓形成的正交矩形波波长及微柱体体积增大而提高,但其随环境温度的升高而降低.基于Leidenfrost液滴在织构化表面上良好自润滑性,低推动力即可促使液滴在织构化表面上快速运动.
At present, the relationship between the textured surface and the liquid flow behavior has become a hotspot in the field of cross-cutting such as friction drag reduction and microreactor. How to predict and actively control the droplet movement is to design and construct a low-friction surface and high-efficiency microreactor The most important issue.The textured surface was prepared by photolithography and the relationship between the interfacial wettability and the surface temperature of the single phase droplets on the heat textured surface was characterized by dynamic contact angle method.The effects of texturing Surface profile and temperature on the wetting state of droplets.Research shows that the Leidenfrost temperature of droplets increases with the wavelength of the orthogonal rectangular wave formed by the textured surface profile and the increase of the volume of the microcapsules, Rise and decrease.Based on the good self-lubricating properties of Leidenfrost droplets on the textured surface, low impetus allows the droplets to move rapidly on the textured surface.