Interfacial dilatational rheology is a useful tool to investigate the properties of liquid interfaces containing surface active compounds like surfactants, lipids, or polymers.
While similar to the pendant drop measurement for surface/interfacial tension of liquids, an interfacial dilatational rheology measurement monitors surface/interfacial tension under dynamic conditions, specifically while the drop area is changed. This measurement can give valuable insight into the kinetics of surface active compounds as well as the stability of foams and emulsions used in food, cosmetics, and other industries.
In this masterclass we will discuss the pulsating drop, or oscillating drop, method for measuring interfacial dilatational rheology. We will go through properly setting up a measurement using the Attension Theta Flow optical tensiometer combined with the pulsating drop (PD200) module. Then we will show how to extract the viscoelastic parameters from the collected data using OneAttension software.
View the Entire Masterclass Series:
- Going Full-Tilt: Dynamic Contact Angle Measurements with a Tilting Cradle
- Measuring Roughness Corrected Contact Angle: Combined Contact Angle and Surface Roughness Measurements with 3D Topography
- It’s a Small World: Contact Angles at the Picoliter Scale
- Dynamic Contact Angle Measurements with a Tilting Stage
- Get Hooked: Interfacial Tenson & Captive Bubble Measurements with a Hooked Needle
- Dilatational Interfacial Rheology with the Pulsating Drop Module
