Advanced Spinning Drop Video Tensiometer
APPLICATION SCOPES:
Regular or Ultra-low Surface/Interfacial Tension Measurements and Interfacial Rheology Research. A new concept of doing Spinning Drop Measurements; Video-based Tensiometer with rotational speed up to 20,000 RPM capable of reporting interfacial visco-elasticity. Most widely used in oil, petroleum, emulsion, detergent, cosmetic, pharmaceutical and healthcare industries. But not limited to.
METHODS:
Spinning Drop Method.
FEATURES:
The SVT 20 is used for the software controlled and video supported measurement of;
- Static and time dependent interfacial tension between two not completely miscible liquids.
- Two and three-dimensional extensional relaxation of viscoelastic liquids and liquids droplets encapsulated or enclosed in membranes.
- Yield point of e.g. liquid crystalline materials.
- Thermal expansion coefficients of liquids.
- All measurements are performed according to the Spinning Drop and Oscillating Drop Method.
The 64-bit Windows 7 & 8 compatible software developed for the SVT 20 offers;
- Time dependent control of rotational speed as well as the adjustment of the capillary position in height and tilt.
- Recording and evaluation of video sequences for the measurement of fast relaxational vibrations of drops.
- Calculation of interfacial tensions from the shape of rotating drops (spinning drops) according to the Young-Laplace Equation as well as according to the Vonnegut approximation for sufficiently extended droplets.
- Calculation of relaxational modules, yield points and other rheological parameters.
- An extended liquid data base with more than 140 parameter entries.
SVT 20/TPC180
