Silicon-containing surfactants are a class of surfactants composed of polydimethylsiloxane as its hydrophobic backbone and one or more organosilicon polar groups connected to the meta or terminal positions. Silicon-containing surfactants have properties such as high temperature resistance and microbial resistance that are not found in silicon-free surfactants, and are currently widely used in the daily chemical industry, textiles, coatings, paints, plastics, agricultural chemicals, medicine, and mechanical processing.

There are many synthetic methods for silicon-containing surfactants, such as the addition reaction of epoxy silane and octadecyl dimethyl tertiary amine, the substitution reaction of haloalkyl silane and octadecyl dimethyl tertiary amine, amino The quaternization reaction of silane and the ring-opening reaction of aminosilane and epoxy compound, etc.

Among them, the substitution reaction of haloalkyl silane and octadecyl dimethyl tertiary amine is the easiest way to prepare organosilicon quaternary salt. For example, the substitution reaction of long carbon chain octadecyldimethyl tertiary amine with v-chloropropyltrimethoxysilane is a simple way to prepare the target product.
 
Silicon-containing surfactants are widely used, and with the increase in the supply of the industry, the application range of the products is further expanded.

In the fields of food and medicine, silicon-containing surfactants have good defoaming and anti-foaming effects on the foam produced in the production of monosodium glutamate, soybean products and antibiotics.
   
In the plastics industry, silicon-containing surfactants can produce polyurethane soft foam, rigid foam, semi-rigid foam and high resilience foam. In addition, as a flame-retardant silicone foam stabilizer, the application of polyurethane foam has become more and more extensive.
 
In the field of pesticides, silicon-containing surfactants can increase the utilization rate of pesticides, reduce the amount of pesticides used, and reduce the amount of pesticides used, thereby reducing soil and water pollution and improving the safety of pesticides.
 
In the textile field, organopolysiloxane surfactants have good flexibility and are one of the indispensable raw materials for high value-added and high-functional fiber products. Active silicone softeners are mainly composed of hydroxyl-containing silicone emulsifiable concentrates and hydrogen-containing silicone emulsifiable concentrates. Under the catalysis of some metal salt catalysts, a net-like structure is formed on the surface of the fabric, which makes the fabric have good flexibility and washing resistance.