Changes in two-phase emulsion morphology in temperature–amphiphile concentration or fish diagram for ternary amphiphile/oil/water systems

We examined the morphologies of two-phase emulsions in the ternary 2-butoxyethanol/ n-decane/water system at various temperatures and water-to-oil ratios (WORs). The two-phase emulsion morphologies depended on temperature, WOR, and amphiphile concentration, and the results are presented in a tempera...

Full description

Saved in:
Bibliographic Details
Published in:Journal of colloid and interface science 2005-10, Vol.290 (1), p.241-249
Main Authors: Lee, Jong-Moon, Lim, Kyung-Hee
Format: Article
Language:English
Subjects:
Alkanes - chemistry
Chemical Phenomena
Chemistry
Chemistry, Physical
Colloidal state and disperse state
Emulsion inversion
Emulsion morphology
Emulsions
Emulsions. Microemulsions. Foams
Ethylene Glycols - chemistry
Exact sciences and technology
General and physical chemistry
Phase inversion temperature (PIT)
Phase Transition
Surface Properties
Temperature
Two-phase emulsions
Water - chemistry
Water-to-oil ratio (WOR)
“Fish” diagram
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We examined the morphologies of two-phase emulsions in the ternary 2-butoxyethanol/ n-decane/water system at various temperatures and water-to-oil ratios (WORs). The two-phase emulsion morphologies depended on temperature, WOR, and amphiphile concentration, and the results are presented in a temperature–amphiphile concentration coordinate system or a “fish” diagram. The observations made in this work contradict the predictions by the phase-inversion-temperature (PIT) concept. At WOR T uc (upper critical endpoint temperature) and at low amphiphile concentrations, only B/T emulsions appeared, irrespective of temperature. At WOR > 1, the situation was reversed; T/B emulsions at T < T lc , T/B and B/T emulsions at T > T uc , and T/B emulsions at low amphiphile concentrations, irrespective of temperature. At WOR = 1, two horizontal inversion lines, one each at T < T lc and T > T uc , were observed. The morphologies of the two-phase emulsions were B/T or T/B emulsions at low amphiphile concentrations, and at higher amphiphile concentrations T/B at T < T lc and B/T at T > T uc . All these findings along with three-phase emulsion data result in complete emulsion morphology diagrams in the temperature–amphiphile concentration space or fish diagram.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2005.03.094