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首页> 外文期刊>Journal of Materials Engineering and Performance >Estimation of Intrinsic Contact Angle of Various Liquids on PTFE by Utilizing Ultrasonic Vibration
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Estimation of Intrinsic Contact Angle of Various Liquids on PTFE by Utilizing Ultrasonic Vibration

机译：利用超声振动估算各种液体在PTFE上的内在接触角

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摘要

The contact angle measured using the sessile drop method is typically an advancing contact angle, which is often used for the evaluation of wettability. However, the precise measurement of the contact angle on rough substrates has been required for developing various industrial processes. In this study, a new measuring method by achieving the minimum total free energy by ultrasonic vibration (USV) was developed. The new method has been demonstrated for different rough surfaces, droplet volumes, and wettability conditions. The advancing contact angle significantly decreased when the USV is applied, but it immediately increased after stopping the USV. In order to capture the droplet behavior at the beginning and end of the USV, a high-speed camera was used. The contact angle was apparently a receding contact angle after stopping the ultrasonic vibration. Accordingly, the intrinsic contact angle was estimated using the values of the advancing contact angles obtained before applying the ultrasonic vibration and the receding contact angles obtained after stopping the ultrasonic vibration.
机译：使用无滴法测量的接触角通常是前进的接触角，通常用于评估可湿性。但是，为了发展各种工业过程，需要精确测量在粗糙基底上的接触角。在这项研究中，开发了一种通过超声振动（USV）实现最小总自由能的新测量方法。已经针对不同的粗糙表面，液滴体积和润湿性条件证明了该新方法。施加USV时，前进接触角显着减小，但在停止USV后立即增大。为了捕获在USV的开始和结束时的液滴行为，使用了高速相机。接触角显然是在停止超声振动之后的后退接触角。因此，使用在施加超声波振动之前获得的前进接触角和在停止超声波振动之后获得的后退接触角的值来估计本征接触角。

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