Surface chemistry is the branch of chemistry that studies the chemical and physical behaviors occurring at the interface between two phases (liquid-solid, liquid-liquid, etc.) and is a multidisciplinary field of research that pertains to many (if not all) situations in our daily lives and thus touches virtually every industrial and research sector. Measuring the surface tension of a liquid or the surface energy of a solid, and understanding the polar and dispersive components, are critical factors in defining the characteristics of a product and a surface. This information determines whether they can be used in subsequent processing stages, as well as which surface treatments (for surfaces) or reformulations (for liquids) should be implemented to achieve the desired objectives. With over 20 years of experience in this field, thanks to our collaboration with various partners, we are able to offer a complete range of solutions, identifying the most suitable option among portable and benchtop optical contact angle systems, test liquids, tensiometers, and bubble pressure tensiometers.
The contact angle (θ) is the fundamental parameter for describing the wettability of a solid surface by a liquid. It forms at the interface between the solid, liquid, and vapor phases and is defined by Young’s equation, which relates the three interfacial tensions involved. An angle less than 90 degrees indicates a hyd...
Methods for measuring surface tension must intentionally increase the surface area, typically through pulling or pushing. In the bubble pressure method, this is achieved by creating an air bubble at the tip of a Capillary. All SITA tensiometers operate using this method, ensuring that the measurements are comparable. I...