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)
90.54 64.32

 

dynamic_contact_angle2

Dynamic contact angle of water on a polypropylene plate.

Applications:

Aqueous Solutions Contact Angle Hysteresis Dip Coatings
High Viscous Liquids Metal Sheets Oil Mixtures
Papers Plates PTFE Sheets
Rods Temperature Control Tubing

For more information please read our application notes.

 

Key Specifications:

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

dy700_new

 

ASTM Number Title Website Link
D7334-08 Standard Practice for Surface Wettability of Coatings, Substrates and Pigments by Advancing Contact Angle Measurement Link