Static contact angle (Sessile drop or meniscus methods):
Use contact angles to test hydrophobicity/hydrophilicity, the efficacy of surface treatments, and characterize the wettability of your substrate.
Dynamic contact angle (Tilting stage, Wilhelmy plate, fiber, or advancing/receding drop volume methods):
Advancing and receding contact angles, and contact angle hysteresis, indicate surface chemical or topographical heterogeneity, predict wetting behavior of liquids in porous media, predict coating behavior, and many other application areas.
High pressure contact angle (Sessile drop):
Contact angle measurements at up to 400 bar (5800 psi) and 200 °C can provide wettability information for oil reservoir mineral surfaces at relevant pressures and temperatures.
Surface free energy measurement (Sessile drop, Wilhelmy plate, meniscus, or Washburn methods):
Surface free energy uses contact angle measurements from several probe liquids to paint a more complete and quantitative picture of your surface’s wetting properties, including contributions from polar, dispersive, and acid/base molecular interactions.
Powder wettability measurement (Washburn method):
This technique can determine the contact angle between a solvent and powder or particles, such as powders relevant to pharmaceuticals, cosmetics, and more.
Roughness-corrected static contact angle (Sessile drop method with topography measurement):
This technique involves a precise roughness measurement followed by a contact angle measurement at the same location to provide a more complete picture of wettability. The roughness-corrected contact angle indicates the wettability due to the substrate’s chemistry while the measured contact angle includes contributions from roughness.