R. Skurtveit, J. Sjöblom, H. Høiland
Dec 1, 1989
Citations
0
Influential Citations
19
Citations
Journal
Journal of Colloid and Interface Science
Abstract
Abstract The system sodium hexadecanoate, hexadecanoic acid, water, and decane has been investigated with respect to phase behavior, emulsion formation, and emulsion stability. Extremely stable emulsions have been found. The existence of a lamellar, liquid crystalline phase (D-phase) seems to cause the increased stability of the water/oil (W/O) emulsions, in accordance with findings by Friberg. Addition of salt to oil/water (O/W) emulsions causes an inversion with an intermediate state of reduced stability. This is due to reduced electrostatic repulsive forces and altered packing conditions of surfactant molecules at the water/oil interface. The stability of these reversed structures is qualitatively understood by the existence of a structural repulsive force operating at short distances.