Surface Elasticity and Viscosity from Oscillating Bubbles Measured by Automatic Axisymmetric Drop Shape Analysis

Interfacial characterization of Pluronic PE9400 at biocompatible (air–water and limonene–water) interfaces

“…The system records the response of the surface tension to this area deformation [41]. In a general case, the dilatational modulus (E) is a complex quantity that contains a real and an imaginary part:…”

Effect of emulsifier type against the action of bile salts at oil–water interfaces

“…An oscillatory perturbation was applied to the interface by injecting and extracting volume to the drop. The system records the response of the interfacial tension to the area deformation, and the dilatational modulus (E) of the interfacial layer can be calculated from this response by following the method described by Myrvold and Hansen (1998). The applied interfacial area oscillations were maintained below 5% of amplitude to avoid excessive perturbation of the interfacial layer and the departure from the linear viscoelastic region, which was checked in preliminary experiments.…”

Foaming and interfacial properties of hydrolyzed β-lactoglobulin

“…From the modulus and from the phase angle between the surface area change and surface tension response, the DROPimage software calculated E and E , which are equivalent to and proportional to the elastic and viscous components of the interface, respectively. The details for these calculations have been described elsewhere [27].…”

“…The following method of interfacial data collection has been recently described [7,8]. An automated contact angle goniometer (Rame-Hart, Inc., Mountain Lakes, NJ) was used for data collection and calculations in combination with the DROPimage computer program [27]. The dynamic surface tension of a 16-µl capillary drop was initially monitored for 5 min with a 1-s resolution.…”