info:eu-repo/semantics/article
Regarding the effect that different twin-tailed surfactant have on a solid stabilized petroleum emulsion
Fecha
2008-12Registro en:
Messina, Paula Verónica; Pieroni, Olga Inés; Verdinelli, Valeria; Schulz, Pablo Carlos; Regarding the effect that different twin-tailed surfactant have on a solid stabilized petroleum emulsion; Springer; Colloid and Polymer Science; 286; 2; 12-2008; 191-199
0303-402X
CONICET Digital
CONICET
Autor
Messina, Paula Verónica
Pieroni, Olga Inés
Verdinelli, Valeria
Schulz, Pablo Carlos
Resumen
An industrial petroleum emulsion stabilized by colloidal silica particles was treated with four different twin-tailed surfactants: sodium bis-2-(ethylhexyl) sulfosuccinate (AOT), didodecylammonium bromide (DDAB), calcium oleate (Ca(OL)2), and dioctadecyldimethylammonium bromide (DODAB). Fourier transform infrared (FT-IR) spectroscopy, optical microscopy, centrifuge test, and conductivity measurement were employed to determine the effect of the amphiphile molecules on the crude oil emulsion. AOT and DDAB produce emulsion breakdown, while Ca(OL)2 does not alter the emulsion stability and DODAB produces an extra stabilization of it. The AOT adsorption at the oil–water droplet interface is a spontaneous process, which promoted the emulsion breakdown through an interdroplet interaction mechanism. DDAB needs extra energy (via centrifugation) to destabilize the emulsion. Ca(OL)2 dissolves in oil phase and remains there without altering the emulsion strength, while DODAB increases the emulsion stability.