Contact Angle Measurement

Contact angle measurement is a way to assess how easily a liquid spreads on a solid surface. It involves placing a small droplet of liquid on the surface and measuring the angle formed between the droplet's edge and the surface. A small angle indicates the liquid easily wets the surface, showing it's hydrophilic or water-loving. A large angle means the droplet beads up, indicating the surface is hydrophobic or water-repelling. This measurement helps evaluate surface properties, such as cleanliness, coating effectiveness, or material compatibility, and is widely used in industries like coating, textiles, and biomaterials.