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Stability study of the sol/gel reversible phase transition of a temperature-responsive hydrogel
Using the DataPhysics MS 20 stability analysis system and its corresponding MSC software, an easy and fast way to study the temperature reversibility, phase transition and destabilisation mechanisms of a hydrogel system is demonstrated.

Studying the particle size distribution of a polystyrene suspension based on sedimentation
In this application note, the DataPhysicvs MultiScan MS 20 dispersion stability analysis system is used to analyse the particle size distribution of polystyrene particles in water.

Calculation of mean particle size using the sedimentation rate to evaluate mean particle size and study stability of a suspension system
Using the DataPhysics MS 20 stability analysis system and its corresponding MSC software, an easy and fast way to evaluate mean particle size is demonstrated.

Measuring the surface potential and isoelectric point of polyester fibres with a zeta potential analyzer
In this application note, the ZPA 20 is used to study the electrical properties and functional groups at the surface of polyester fibres.

Measuring the surface potential and isoelectric point of glass fibres with a zeta potential analyzer
The ZPA 20 zeta potential analyzer from DataPhysics provides quick and reliable zeta potential measurements for fibres, powders, and plate-shaped solid surfaces by using an oscillating streaming potential technique.

Determination of low interfacial tensions with the DataPhysics spinning drop video tensiometer
By using the DataPhysics spinning drop tensiometer, the low interfacial tension between surfactant and oil can be determined easily and reliably. The SVT technique provides a fast and efficient way to determine low interfacial tension between liquids with a high reproducibility.

Evaluating the efficiency of surfactants by dynamic interfacial tension measurements of brine and crude oil
Measurements with an SVT spinning drop video tensiometer can give quick, easy to achieve and helpful insights into the behaviour of the interfacial tension between brine and crude oil and hence can be used to improve formulations and procedures used in enhanced oil recovery.

Measuring contact angles and absorption processes on wettable and non-wettable powders using optical contact angle and contour analysis
In this application note, the wetting behaviour of wettable and non-wettable powders were studied using the example of FeSi powders.

Optical contour analysis: absorption measurements of water droplets on filter membranes
The optical contact angle measuring and contour analysis systems of the DataPhysics OCA series with their high frame rate video systems can be used to directly and simply evaluate even the fastest absorption processes. Through the precise and accurate determination of the decrease in volume of a drop moving into an absorbent surface, the details of the influences on the on-going absorption process can be deduced.

Measuring the water contact angle on surface-treated polymer films according to ASTM D5946
In this note, the application of the ASTM D5946 will be presented using an optical contact angle measuring system of the DataPhysics OCA series.

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