Energetic study of ultrasonic wettability enhancement

Area of Science:

• Surface Science and Interfacial Phenomena
• Acoustics and Thermodynamics

Background:

• Industrial and biological processes like welding and breathing rely on wettability and surface tension.
• Current wettability control methods involve modifying fluid or substrate properties.
• Ultrasound is known for surface cleaning via acoustic cavitation.

Purpose of the Study:

• To investigate the use of high-frequency acoustic waves (ultrasound) for controlling wettability.
• To develop a thermodynamic model explaining ultrasound's effect on contact angle in three-phase systems.
• To compare ultrasound's efficiency and environmental impact against traditional surfactants.

Main Methods:

• Development of a thermodynamic model for ultrasound-induced contact angle reduction.
• Analytical research on acoustic wave interactions with wetting systems.
• Experimental validation of the model and observed wettability changes.

Main Results:

• Ultrasound exposure demonstrably enhances wettability and decreases contact angles.
• A thermodynamic model was successfully developed to describe the phenomenon.
• Ultrasound offers tunable contact angle adjustment via vibration amplitude.

Conclusions:

• Ultrasound presents a viable, energy-efficient, and environmentally friendly alternative to surfactants for wettability control.
• The developed thermodynamic model provides physical principles explaining ultrasound's effect on wetting.
• Further research can leverage ultrasound for advanced interfacial process control.