Surfactant surfactants and nonionic surfactants.
The ionic surfactants are divided into two types of surfactants, anionic surfactants and cationic surfactants.
Anionic: with negatively charged polar groups, mainly carboxylate, sulfonate, sulfate, phosphate
Cationic: with positively charged polar groups, mainly quaternary ammonium salts, alkyl pyridine salts, amine salts and so on.
The use of the different needs, more different I can not speak, just to give an example
In the various branches of chemistry, the reaction rate is extremely sensitive to the environment, and the presence of micelles in the solution has a significant effect on many chemical reactions.
For example, hydrolysis of the ester RCOOR-> RCOO- + HOR
Cetyltrimethylammonium bromide has a catalytic effect, the reaction rate constant is not added 95 times; and sodium dodecyl sulfate, there is inhibition, the reaction rate constant is 0.4