World’s consumption of natural oils and fats million tons million tons Malaysia Indonesia Argentina = Producers
Surfactants
Classification of Surfactants
Encapsulation systems Liposome:Lipid bilayer enclosing an aqueous core Lipid nanoparticle: Lipid monolayer enclosing a solid lipid core Solid particles stabilizing an emulsion Polymeric nanoparticle Nanoemulsion: Lipid monolayer enclosing a liquid lipid core
Emulsion R > 100 nm Drop size grows continuously with time leading to phase separation. (Thermodynamically unstable) Require input work to make. Milky appearance Microemulsion R~ 5-50 nm Ultra low interfacial tension between oil and water. (Thermodynamically stable) Spontaneous formation at right condition. (Composition dependent) Translucent appearance.