Laboratorio de Ultrasonidos, Departamento de Física, Universidad de Santiago de Chile, Av. Ecuador 3493, Estación Central, Santiago, Chile.
Laboratorio de Ultrasonidos, Departamento de Física, Universidad de Santiago de Chile, Av. Ecuador 3493, Estación Central, Santiago, Chile.
Ultrason Sonochem. 2017 Mar;35(Pt A):134-141. doi: 10.1016/j.ultsonch.2016.09.011. Epub 2016 Sep 13.
Ultrasonic radiation can modify some physical properties in liquid/solid interactions, such as wettability. The dependence of solid surface wettability on its vibrational state was studied. Experiments with an interface formed by distilled water deposited on a titanium alloy and surrounded by air were carried out. It is shown that it is possible to control the apparent wettability of a given liquid/solid/gas system by applying sonic-ultrasonic vibrations of controlled amplitude at the interface. The system studied is composed of a drop of distilled water deposited on a flat titanium surface in air. The contact angle was used as an indicator of apparent wettability. It is shown that the apparent wettability of a surface is linearly dependent on the peak vibration velocity and independent of the vibration frequency. Higher vibration speed lowers the contact angle and therefore causes greater surface wettability.
超声波辐射可以改变液体/固体相互作用中的一些物理性质，如润湿性。研究了固体表面润湿性与其振动状态的关系。实验采用蒸馏水在钛合金上形成界面，并被空气包围。实验结果表明，通过在界面施加受控振幅的声超声振动，可以控制给定的液/固/气系统的表观润湿性。所研究的系统由空气中的一滴蒸馏水在平坦的钛表面上组成。接触角被用作表观润湿性的指标。结果表明，表面的表观润湿性与峰值振动速度呈线性关系，与振动频率无关。较高的振动速度降低接触角，从而导致更大的表面润湿性。
