Dodecyl trimethyl ammonium chloride is a cationic surfactant, which can be used to form nanocapsules. It has good chemical stability, heat resistance, light resistance, strong acid resistance, strong alkali resistance and other characteristics, and is widely used as catalyst, emulsifier, fungicide, disinfectant, antistatic agent and so on in industrial production. In addition, the substance can also be used as an anti-stick agent and isolation agent in the latex industry