Technique:
The angle at which a liquid interface meets a solid surface is called the contact angle. When a liquid has a low contact angle, the liquid is attracted to and will spread out onto the solid surface. Consequently, when a liquid has a high contact angle, the liquid is repelled from and will create a bead of liquid on the surface. Contact angle goniometry is used to measure this angle.
Instrument:
The DSA30E Drop Shape Analyzer is a powerful piece of equipment which is used for accurate measurements of surface free energy (SFE) and contact angle.
The DSA30E is equipped with a uniform LED lighting unit, high-resolution camera, and high-quality optical components. The outcome is a precise image of the dispensed drop which ensures that the drop shape can be reliably evaluated for the contact angle.
The software programming, semi-automatic measuring sequences produce accurate results with a speedy turn-around time.
The DSA30E not only measures the contact angle, but also measures the surface tension of liquids using the Pendant Drop method.
Tasks and Applications
Measuring Methods
Features