What are the structural characteristics of cationic surfactants, please give some examples of their properties and uses

Cationic surfactants are ionized after their molecules dissolve in water, and the hydrophilic groups connected with the oleophilic groups are positively charged surfactants. Oleophilic groups are generally long carbon chain alkyl groups. Most of the hydrophilic groups are cations containing nitrogen atoms, and a few are cations containing sulfur or phosphorus atoms. The anions in the molecule are not surface active and are usually single atoms or groups, such as chlorine, bromine, and acetate ions. Cationic surfactants have a positive charge, as opposed to the charge carried by anionic surfactants, and the combination of the two will generally form a precipitate and lose surface activity. It can be used in combination with nonionic surfactants.

use

Used as fabric softener, paint ink printing aid, antistatic agent, fungicide, asphalt emulsifier, hair conditioner, baking cream.

Because the surface of the general substrate has negative ions, when the positively charged cationic surfactant comes into contact with the substrate, it will combine with the dirt on its surface, without dissolving the dirt, so it is generally not a detergent.