INQUINOA   21218
INSTITUTO DE QUIMICA DEL NOROESTE
Unidad Ejecutora - UE
artículos
Título:
Interaction parameter of anhydrous cationic surfactant mixtures by Inverse Gas Chromatography
Autor/es:
S. M. BARDAVID P. C. SCHULZ Y E .L ARANCIBIA.
Revista:
Journal Solution Chemistry
Editorial:
Springer
Referencias:
Año: 2011
ISSN:
0095 9782
Resumen:
The miscibility between the anhydrous cationic surfactant dodecylpyridinium
chloride (DPC) and hexadecylpyridinium bromide (cetylpyridinium bromide
(CPB)) mixtures has been studied by using them as stationary phases in
Inverse Gas Chromatography (IGC). The temperature zone of work was
determined by IGC and Differential Scanning Calorimetry (DSC) techniques.
Values of the interaction parameter between surfactants obtained at four
different compositions of the mixtures and at four temperatures showed that the
miscibility depends on the overall composition and suggested that the
interactions are more favourable near the centre of the composition range.
Results are compared with other anhydrous cationic surfactant mixtures studied
by IGC, the system didodecyldimethylammonium bromide (DDAB) and
dioctadecyldimethylammonium bromide (DODAB), which are two twin-tailed
surfactants, and are interpreted in terms of the structure of the anhydrous
lamellar liquid crystals compared with that of aqueous lamellar mesophases.