2.4. Interfacial tension measurements
Interfacial tensions were measured using a K100 Tensiometer
(Kruss, Germany) using the Wilhelmy plate method with an
immersion depth of 2 mm measured over 600 s. All interfacial tension
measurements were performed in triplicate and at an ambient
temperature of 20 C.
2.5. Viscosity measurements
Viscosity measurements of selected samples were performed
using a dynamic shear rheometer with a 25 mm diameter vane
geometry in a cup with a diameter of 27 mm, Bohlin (Malvern,
UK), using a shear rate profile from 0.1 to 100 s1. All measurements
were performed at 25 C.