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?
2 Microemulsion methods. A microemulsion is a thermodynamically stable transparent, isotropic dispersion of two immiscible liquids such as water and oil stabilized by surfactant molecules at the water/oil interface.
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.
How are microemulsions made?
Microemulsions are thermodynamically stable, self-assembled systems comprising droplets (1–100 nm), spontaneously formed upon mixing oil and aqueous phases and stabilized by appropriate surfactants.
How do you make a microemulsion solution?
Microemulsion systems were prepared by mixing oil with the mixture of surfactant and cosurfactant, and water was added precisely into oily phases with magnetic stirring (300 r/min) at 37°C.
What are the types of microemulsion?
There are three kinds of microemulsions: oil dispersed in water (o/w), water dispersed in oil (w/o), and bicontinuous.
What is microemulsion polymerization process?
Microemulsion polymerization is defined as polymerization involving a radical chain propagation reaction with vinyl monomers in one phase of a microemulsion, and the produced polymer colloid is denoted as latex.
What is sonochemical method?
Sonochemistry is a branch of chemical research dealing with the chemical effects and applications of ultrasonic waves, i.e., sound at high frequencies that the human ear finds difficult to respond and eventually the human hearing threshold is reached, normally around 18–20kHz for adults.
What is microemulsion Slideshare?
Microemulsion have been successfully used to improve the solubility, chemical stability, and oral bioavailability of many poorly water soluble drugs. They have characteristic properties such as a low interfacial tension, large interfacial area and capacity to solubilize both aqueous and oil-soluble compounds. Read more.
What are the four compositions of microemulsion?
Introduction. Isotropic, spontaneous forming, microstructured liquid phases named microemulsions are composed of water, an oil phase and a surfactant, or more generally a mixture of surfactant and cosurfactant.
What is microemulsion polymerization?
What is the difference between emulsion and microemulsion?
Emulsions are stable dispersions of immiscible liquids, but they are not thermodynamically stable. We say that they are kinetically stable. These type of dispersions are sometimes called macroemulsions. Microemulsions, on the other hand, are thermodynamically stable.