Effect of Mass Fraction of Water Nanodroplet and Water Content on the Localization Location of Dye Within Microemulsion

Document Type : Original Article

Authors

1 Zabol University, Faculty of Basic Sciences, Physics Department, Zabol, Iran

2 Zahedan University, Faculty of Basic Sciences, Department of Physics, Zahedan, Iran

3 Velayat University, Faculty of Basic Sciences, Physics Department, Iranshahr, Iran

Abstract

In this work, effect of water content as dispersed phase of water/AOT/oil microemulsions on the droplet size and location of hydrophilic probe‎ of Rhodamine B (RhB) within microemulsion was studied by means of dynamic light scattering (DLS) and absorption spectroscopy. The dynamical characterization of micelles by DLS technique showed that by increasing the water content within AOT microemulsion containing dye with certain concentration, the droplet size increased and the interactions between nano-droplets were more attractive as a function of the mass fraction of nano-droplets (MFD). Study of the dye spectroscopy within microemulsion indicated that the changes in λmax of absorption of dye within AOT microemulsion decreased as W increased with MFD.  It was also observed that hydrophilic dye of Rhodamine B can be located near tail of AOT (Gouy Chapman Layer) of microemulsion in addition to the locating into the water/oil interface (Stern Layer) but not in water droplet. On the other hand, the number of formed AOT-RhB ion pair complex in the oil increased with decrease in content of water of within water/AOT/oil microemulsion.

Keywords

Main Subjects

References

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Journal of Color Science and Technology
Volume 14, Issue 1
June 2020
Pages 63-71

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