Phase behavior of the alpha-hydroxyoctanoic acid/Laureth 4/white oil/water system and preliminary evaluation of the phase changes during evaporation of its emulsion.
The phase diagram was determined for the alpha-hydroxyoctanoic acid/Laureth 4/white oil/water system using visual observation with an optical microscope. Typical emulsions were evaporated to determine the structural changes. These were compared to those predicted from the phase diagram. Small-angle x-ray diffraction was used to determine the location of the alpha-hydroxyoctanoic acid in the lamellar liquid crystal. The most important result is the fact that irrespective of initial composition, the final result was a suspension of solid acid particles with dissolved oil and surfactant in a surfactant/oil liquid with only minute amounts of solubilized acid.
Al-Bawab
Abeer
A
Chemistry Department/Faculty of Science, University of Jordan, Amman 11942, Jordan.
Friberg
Stig E
SE
D002210:Caprylates / Q000737:chemistry*; D004655:Emulsions; D006880:Hydroxy Acids / Q000737:chemistry*; D009821:Oils / Q000737:chemistry*; D000077423:Polidocanol; D011092:Polyethylene Glycols / Q000737:chemistry*; D014867:Water / Q000737:chemistry*; D014961:X-Ray Diffraction
D002210:Caprylates; D004655:Emulsions; D006880:Hydroxy Acids; D009821:Oils; D014867:Water; D000077423:Polidocanol; D011092:Polyethylene Glycols