Surface tension measurement - analysis by Goniometer
Your need: perform a Goniometer analysis
The Goniometer in a few words
The goniometer is a device for measuring surface tension and surface tension by contact angle.
The device deposits a drop of deionised water or other solvent with a predefined volume of a few µl on the surface of a material and then analysis the shape of the drop at a rate of 80 images per second.
Why perform a Goniometer analysis?
The dynamic measurement of the contact angle provides information on the spreading rate or absorption rate of the material under analysis. As with the static measurement, a drop is deposited on the surface of the material. The evolution of its contact angle is measured by acquiring an image every millisecond for up to 10 minutes.
FILAB offers you its Goniometer analysis services
In order to support manufacturers in the development and quality control of their products, the FILAB laboratory provides a state-of-the-art 2100m² analytical facility for goniometer analysis.
This equipment can be used in addition to other analytical techniques:
our services
Drop size measurement by laser granulometry
Surface energy measurement
Drop angle measurement
Measurement of adhesion between a liquid and a solid
Characterization of droplet distribution by SEM-FEG-EDX
Measurement of the surface wettability of a material
Liquid surface tension measurement
Static and dynamic drop angle measurements
Contact Angle is the most widespread method for quantifying the wetting properties of a solid and characterizing other surface features. The contact angle is defined as the angle formed by a liquid droplet at the point where the three phases (solid, liquid, and gas) converge, also known as the three-phase boundary point. At this boundary, there is an equilibrium between the forces exerted on it by the solid, liquid, and gas or sometimes by the solid, liquid, and liquid. Generally, a measured contact angle below 90° indicates high wetting properties, while a contact angle above 90° indicates low wetting properties.
Surface tension can be understood in two ways: as a tension force acting along all directions of the surface per unit length, or as the energy needed to increase the surface area. In both interpretations, the surface aims to minimize its surface area or potential energy. Consequently, a surface with no (or negligible) external forces will take the form of a sphere, which has the smallest surface area to volume ratio.
