The technique of measuring contact angles is used to quantify the wetting qualities of a liquid droplet on a solid surface. It is widely employed in a wide range of scientific disciplines, including surface chemistry, materials science, and fluid dynamics. The contact angle is the angle formed at the three-phase boundary where the liquid, solid, and gas (usually air) meet.
Measurement of Contact Angle
The following options are available to our client’s thanks to the software used for Drop Shape Analysis and our sophisticated Contact Angle Measuring Instrument:
Tangent, height-width, and YOUNG-LAPLACE (sessile drop fitting) methods for calculating the contact angles of single drops of test liquids on a solid surface.
Volume-controlled sample drop measurement of advancing and receding contact angles
Surface free energy of solid samples can be measured using a variety of techniques, including the acid-base method, the FOWKES, OWENS/WENDT/RABEL/KAELBLE, SCHULTZ, WU, and ZISMAN methods. Surface and interfacial tension of liquids can be measured using drop shape analysis (pendant drop method)
The contact angle can be measured in a variety of ways, including:
The sessile drop method involves placing a droplet of liquid on a flat solid surface and observing and measuring the form of the droplet with optical techniques such as a goniometer or a contact angle goniometer. The contact angle can be estimated using the droplet’s shape.
Video1: How to do a contact angle measurement (Quickstart guide)
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