Phase transitions and microstructure of emulsion systems prepared with acylglycerols/zinc stearate emulsifier

Langmuir : the ACS Journal of Surfaces and Colloids
Adam MacierzankaBrent S Murray

Abstract

The emulsification processes, during which acylglycerols/zinc stearate emulsifier, water, and oil phase formed ternary systems, such as water-in-oil (W/O) emulsions, oil-in-water (O/W) dispersions, and unstable oil-water mixtures, were investigated in order to characterize the progressive transformations of the dispersed systems. The type, structure, and phase transitions of the systems were found to be determined by temperature and water phase content. Crystallization of the emulsifier caused the destabilization and subsequent phase inversion of the emulsions studied, at a temperature of 60-61 degrees C. The observed destabilization was temporary and led, at lower temperature, to W/O emulsions, "O/W + O" systems, or O/W dispersions, depending on the water content. Simultaneous emulsification and cooling of 20-50 wt % water systems resulted in the formation of stable W/O emulsions that contained a number of large water droplets with dispersed oil globules inside them ("W/O + O/W/O"). In water-rich systems (60-80 wt % of water), crystallization of the emulsifier was found to influence the formation of crystalline vesicle structures that coexisted, in the external water phase, with globules of crystallized oil phase. Results of c...Continue Reading

References

Feb 13, 2001·Chemistry and Physics of Lipids·V ChupinB de Kruijff
Nov 18, 2005·Journal of Colloid and Interface Science·Arjen SeinWim G M Agterof

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Citations

Nov 19, 2013·Advances in Colloid and Interface Science·M DouaireI T Norton
Mar 13, 2010·Journal of Colloid and Interface Science·Thomas MoschakisEric Dickinson
Aug 18, 2009·Journal of Colloid and Interface Science·S Ghosh, D Rousseau
Feb 10, 2009·Journal of Food Science·D RousseauH Park

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