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Phase Behavior Of A TX-100/oleic Acid/water Based Ternary System: A Microstructure Study
Published 2017 · Materials Science
Abstract Present work reports the formation of different types of alcohol-free emulsions consisting of TX-100 (surfactant), oleic acid (oil phase) and water. The phase behavior of ternary system (water/oleic acid/TX-100) was observed which showed single phase, multiphase and gel phase regions. The prepared emulsions with a wide range of composition were thermodynamically stable. Investigations into the stability of emulsions under milder conditions showed that they remained stable over four months and even at high centrifugation. A progressive transformation of the water-in-oil (w/o) to bicontinuous phase and inversion to oil-in-water (o/w) microemulsions occurred upon dilution with water, which was confirmed by electrical conductivity, viscosity and microscopic measurements. A static percolation phenomenon was observed in the investigated alcohol-free-emulsion system and the water content at percolation threshold was determined.