S. Backlund et al., PHASE-EQUILIBRIA IN AQUEOUS LOW-MOLECULAR CATANIONIC SURFACTANT SYSTEMS, Journal of dispersion science and technology, 15(5), 1994, pp. 561-573
Phase equilibria in systems alkanoic acid-alkylamine-water have been d
etermined at 298.2 K. In the system hexanoic acid (A) - hexylamine (B)
only one isotropic solution phase is formed. This solution phase is i
n equilibrium with almost pure water. The strong A1B1 complex shows ca
tanionic surfactant properties as concluded from phase equilibria stud
ies in the system A1B1-heptane-water. This system behaves like ordinar
y microemulsions. The dominant feature of the phase diagram with ethan
oic acid-dodecylamine is the large D phase. In addition there exist a
large solution phase, a hexagonal phase and a small cubic I phase.