Surface active agent is a type of chemical with a reducing liquid surface tension and increasing interface activity. According to their molecular structure and action, surfactants can usually be divided into the following four main types:
Catalogenic surfactant: The molecular structure of the cationic surfactant has a positive charge group in the molecular structure, which can form attraction with the surface of the anion or a negative charge in the aqueous solution. These surfactants are often used in products such as soft agents, bactericides.
Actives surfactant: The molecular structure of the anion surfactant has negative charge bases in the molecular structure, which can form attractiveness with the cation in the aqueous solution. Such surfactants are widely used, such as soap, detergent, etc.
Non -ion surface active agent: There is no ion group in the molecular structure of non -ion surfactants, usually composed of oxidation compounds or polymers. These surfactants interact with water molecules through hydrogen bonds or Van Dehua, and adjust the surface nature of the liquid. Non -ionic surfactants such as emulsifier and laundry powder are often used.
Natural surfactant: Natural surfactants are usually substances extracted or separated from natural sources, such as cholesterol and phospholipids. These surfactants play an important physiological function and interface regulatory role in the organism.
The above four types of surfactants are widely used in different applications. The specific selection of the appropriate surfactant should be determined according to the required surface characteristics, environmental conditions, and the characteristics of the processing object.