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


Advancing Angle(deg)

Receding Angle(deg)
90.5464.32
dynamic_contact_angle2

Dynamic contact angle of water on a polypropylene plate.

Applications

Aqueous SolutionsContact Angle HysteresisDip Coatings
High Viscous LiquidsMetal SheetsOil Mixtures
PapersPlatesPTFE Sheets
RodsTemperature ControlTubing

Instrument: Kyowa DyneMaster DY-700 Surface Tensiometer

Instrument Key Specifications

Measurement Range0 – 100 mN/m
Display Resolution0.01 mN/m
Repeatability0.02 mN/m
Sample Volume20 mL – Petri Dish50 mL – Vessel
Stage Movement Range50 mm
Stage Movement Speed0.002 – 50 mm/s

For more information, please read our application notes:
All application notes can be found here

ASTM Standards

ASTMTitleWebsite Link
D7334Standard Practice for Surface Wettability of Coatings, Substrates and Pigments by Advancing Contact Angle MeasurementLink