Dynamic contact angles typically mean advancing and receding contact angles or contact angle changes along time. The dynamic contact angles can be measured conveniently using camera-based contact angle meters. An alternative to the optical image based method is the Wilhelmy balance method available on a surface tensiometer. Instead of using high-speed cameras, a surface tensiometer relies on a high-resolution electronic balance to measure the force acting on the sample over time when the sample is being introduced into or pulling away from a liquid. Given the perimeter of the sample, the contact angle as a function of time and advancing or receding angle can be determined.
Typical Experimental Results:
Dynamic Contact Angles of a Polypropylene plate
Dynamic contact angle of water on a polypropylene plate.
|Aqueous Solutions||Contact Angle Hysteresis||Dip Coatings|
|High Viscous Liquids||Metal Sheets||Oil Mixtures|
For more information please read our application notes.
|Measurement Range||0-100 m N/m|
|Contact Angle Range||0 – 180°|
|Display Resolution||0.01° m N/m|
|Repeatability||0.02 m N/m|
|Sample Volume||20 mL – Petri Dish
50 mL – Vessel
|Stage Movement Range||50 mm|
|Stage Movement Speed||0.002 – 50 mm/s|
Instruments: Kyowa DyneMaster DY-700 Surface Tensiometer
|ASTM Number||Title||Website Link|
|D7334-08||Standard Practice for Surface Wettability of Coatings, Substrates and Pigments by Advancing Contact Angle Measurement||Link|