RecedingWinkel
RecedingWinkel is a term used in surface science to denote the receding contact angle—the angle formed at the three-phase contact line when a liquid droplet on a solid surface retracts, or de-wets, from the surface. It is one component of contact angle hysteresis, the difference between the advancing angle (measured as the liquid spreads or is driven onto the surface) and the receding angle. The receding angle reflects the balance of interfacial tensions among solid, liquid, and vapor, and it depends on surface chemistry, roughness, and the properties of the liquid. In many systems the receding angle is smaller than the advancing angle, and the exact value can be influenced by the speed of withdrawal and contact-line pinning.
Measurement and observation: The receding angle can be determined with methods such as tilting plate, pendant-drop,
Applications and significance: Receding angles are used to characterize wetting properties of coatings, inks, and microfluidic