Abstract
We study dynamic and structure of nano-droplets of AOT/water/oil microemulsion with different oils at water/AOT molar ratio of 6.7. Photon correlation spectroscopy is used to study collective diffusion coefficient of nano-droplets at AOT microemulsion with decane and cyclohexane. The collective diffusion coefficient of nanodroples is increasing with change of oil from decane to cyclohexane. The structure of AOT microemulsion with decane and cyclohexane is founded with SAXS. Our results show, nano-droplets of AOT microemulsion with decane at X = 6.7 have cylindrical structure and AOT microemulsion with cyclohexane at X = 6.7 have spherical structure.
Highlights
One of the interesting topics in the soft matter physics is study of dynamic of nano-droplets inside of microemulsion
We studied the behavior of the collective diffusion coefficient at the AOT microemulsion with decane and cyclohexane at molar ratio of 6.7 by photon correlation spectroscopy (PCS) and SAXS techniques
Microemulsions were formulated by mixing AOT with water and n-Decane or cyclohexane at the fixed molar ratio of water to AOT (X = 6.7) at the different mass fraction (0.01 < mf < 0.07 dilute regime)
Summary
One of the interesting topics in the soft matter physics is study of dynamic of nano-droplets inside of microemulsion. Shape and size of nanodroplets are depends to the solutions of microemulsion, for example using the different oil can change the structure of nano-droplets. Microemulsions are thermodynamically stable mixtures of water, oil and surfactant with nano-meter size of droplets and oil is usually a hydrocarbon or a solution of a solute in a hydrocarbon [1,2,3,4]. The anionic surfactant Aerosol OT (sodium bis-(2-ethylhexyl) sulfosuccinate, AOT) together with water and oil readily forms ternary microemulsions [7,8]. The AOT microemulsion at X = 6.7 show a single water-in-oil (L2) phase at the room temperature.
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