Table of Contents
What is microemulsion formulation?
MEs are water based formulations with a very small emulsified droplet size; this makes the formulation transparent. They are thermodynamically stable over a wide temperature range due to this very fine droplet size, usually between 0.01 and 0.05 μm.
What is microemulsion process?
Microemulsion is a thermodynamically stable isotropic dispersion of two immiscible liquids (water and oil) in which a monolayered film of surfactant molecules stabilizes each microdomain of both liquids (Gupta and Gupta, 2005; Mahmoudi et al., 2011; Wu et al., 2008).
What is a microemulsion example?
They are prepared by simple mixing of the components and do not require specific preparation conditions. There are three kinds of microemulsions: oil dispersed in water (o/w), water dispersed in oil (w/o), and bicontinuous.
What is true microemulsion?
Microemulsions are clear, thermodynamically stable isotropic liquid mixtures of oil, water and surfactant, frequently in combination with a cosurfactant. The aqueous phase may contain salt(s) and/or other ingredients, and the “oil” may actually be a complex mixture of different hydrocarbons.
How many preparation methods are available for microemulsion?
Different methods of nanoparticle synthesis in micro emulsions: (a) one microemulsion method: energy triggering method and (b) one-micro emulsion method plus reactant method. Figure 4. Two-microemulsion method.
What is microemulsion method for synthesis of nanoparticles?
Controllable particles sizes of starch nanoparticles were synthesized via a precipitation in water-in-oil microemulsion approach. Microemulsion method offers the advantages of ultralow interfacial tension, large interfacial area, and being thermodynamically stable and affords monodispersed nanoparticles.
Which of the following properties are characteristic of microemulsion?
A microemulsion is a thermodynamically stable dispersion of two immiscible liquids in the presence of an emulsifier or surfactant. They are characterized by ultralow interfacial tension, large interfacial area, and capacity to solubilize both water and oil components.
What is the size range of microemulsion?
about 10–300 nm
A microemulsion is a thermodynamically stable fluid that differs from kinetically stable emulsions, which will separate into oil and water over time. The particle size of microemulsions ranges from about 10–300 nm. Because of this small particle size, microemulsions appear as clear or translucent solutions.
What is global size for microemulsion?
1–100 nm
Conventionally, the term, ‘microemulsion’ refers to a thermodynamically stable, isotropic emulsion with a droplet size of 1–100 nm.