TY  - JOUR
A1  - Kovach, Ildyko
A1  - Koetz, Joachim
A1  - Friberg, Stig E.
T1  - Janus emulsions stabilized by phospholipids
JF  - Colloids and surfaces : an international journal devoted to the principles and applications of colloid and interface science ; A, Physicochemical and engineering aspects
N2  - Janus emulsions were formed by mixing three immiscible liquids; this implies two oil components (i.e. olive oil (00) and silicone oil (SiO)) with water in presence of interfacial active components. The morphology and size of Janus droplets formed strongly depended on the type of surfactant used. In presence of a non-ionic surfactant, i.e. Tween 80, large engulfed Janus droplets were formed. By adding phospholipids to the system the droplet size was decreased and more stable Janus droplets formed. Interfacial tension measurements carried out using a spinning drop apparatus and a ring tensiometer demonstrate that interfacial tension is the most important factor controlling the size, morphology and stability of Janus droplets. When the interfacial tension between oil and water becomes <= 1 mN/m, smaller Janus droplets are formed. Such conditions are fulfilled when phospholipids are used in combination with non-ionic surfactant Tween 80. The morphology of the double droplets is predominantly controlled by the viscosity and interfacial tension between the two oil phases. By using different types of phospholipids, i.e. asolectin and lecithin instead of a more concentrated phosphatidylcholine (phospholipon), the interfacial tension is decreased and different morphologies of engulfing can be observed.
KW  - Janus emulsions
KW  - Spinning drop
KW  - Interfacial tension
KW  - Phospholipids
Y1  - 2014
U6  - https://doi.org/10.1016/j.colsurfa.2013.08.065
SN  - 0927-7757
SN  - 1873-4359
VL  - 441
SP  - 66
EP  - 71
PB  - Elsevier
CY  - Amsterdam
ER  -