What are the best practices for Contact Angle Measurement?

  • Practical surfaces and coatings naturally show contact angle hysteresis, indicating a range of equilibrium values. 
  • Measuring static contact angles provides a single value within this range. 
  • Solely relying on static measurements poses problems, like poor repeatability and incomplete surface assessment regarding adhesion, cleanliness, roughness, and homogeneity.
  • Practical applications require understanding a surface’s liquid spreading ease (advancing angle) and removal ease (receding angle), such as in painting and cleaning. 
  • Measuring advancing and receding angles offers a holistic view of liquid-solid interaction, unlike static measurements, which yield an arbitrary value within the range. Hence, we recommend doing Advancing and receding contact angle measurements. 
  • You can check out the advancing and receding contact angle measurement here.

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