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Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/12495

Oil/water droplet formation by temperature change in the water/c(16)e(6)/mineral oil system

AutorMorales, D.; Solans, Conxita; Gutiérrez, José M. ; García-Celma, M. J.; Olsson, U.
Palabras claveOil/Water droplet formation
Temperature change
Mineral Oil System
Fecha de publicación28-feb-2006
EditorAmerican Chemical Society
CitaciónLangmuir 22(7): 3014-3020 (2006)
ResumenDroplet sizes of oil/water (O/W) nanoemulsions prepared by the phase inversion temperature (PIT) method, in the water/C16E6/mineral oil system, have been compared with those given by a theoretical droplet model, which predicts a minimum droplet size. The results show that, when the phase inversion was started from either a single-phase microemulsion (D) or a two-phase W+D equilibrium, the resulting droplet sizes were close to those predicted by the model, whereas, when emulsification was started from W+D+O or from W+D+Lα (Lα = lamellar liquid crystal) equilibria, the difference between the measured and predicted values was much higher. The structural changes produced during the phase inversion process have been investigated by the 1H-PFGSE-NMR technique, monitoring the self-diffusion coefficients for each component as a function of temperature. The results have confirmed the transition from a bicontinuous D microemulsion at the hydrophile−lipophile balance (HLB) temperature to oil nanodroplet dispersion in water when it is cooled to lower temperatures.
Descripción7 pages, 11 figures, 2 tables.-- PMID: 16548551 [PubMed].-- Printed version published Mar 28, 2006.
Versión del editorhttp://dx.doi.org/10.1021/la052324c
ISSN0743-7463 (Print)
1520-5827 (Online)
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