Tag Archives: receding angle
Fluid Deposition Style of Contact Angle Measurements
Measuring the contact angle of a fluid on a surface provides an accurate reading of surface energy. However, methods of depositing the droplet and measuring the contact angle vary. With this sensitive process, every detail and particularity effects the measurement.
Common surface measurement instruments, such as goniometers, use an automated syringe needle to deposit a single drop of fluid. However, the manner in which the drop of fluid is deposited greatly impacts the contact angle and entails precise control. Furthermore, the composition of fluid used effects the measurement and potentially the surface.
Alternative fluids can be dangerous to the user and contamination to the material. This often requires the use of a coupon, or sample rather than a measurement on the actual surface of the material in question. Furthermore, a single drop does not have the ability to measure on diverse surfaces.