Emulsion
Emulsifier, also known as "emulsion", "emulsion" or "emulsion", refers to a heterogeneous liquid dispersion system in which a phase of liquid is dispersed in a droplet state in another phase liquid The The emulsion composed of oil and water mixture is divided into a water-in-oil type emulsion and an oil-in-water emulsion according to the continuous phase and the dispersed phase. The former phase is the oil and the dispersed phase is the aqueous solution, and the continuous phase is the aqueous solution, In addition to the above two types of emulsions, there are complex emulsions. The oil phase, the aqueous phase and the emulsifier are the main components of the emulsion. The drug is dispersed in the water phase or oil phase according to its physical properties. The emulsifier should have significant surface activity; it can form the interface film around the droplets; Drop surface to form an electrical barrier; can increase the viscosity of the medium; and also have a good acid, alkali, salt stability, no irritation. ...