Surfactants are substances that can significantly reduce the surface tension and liquid-liquid interfacial tension of liquids. Their molecules are composed of polar hydrophilic groups and nonpolar hydrophobic groups. The common hydrophilic part is carboxyl, sulfate, sulfonic acid, amino, quaternary ammonium and hydroxyl, while the hydrophobic part is represented by long-chain alkanes and aromatics.

Various chemical additives used in viscose production can be divided into three to four categories.

Surfactant molecules are first adsorbed on the interface between oil and solution. Under the action of lipophilic and hydrophilic groups of surfactant, coupled with the convection and stirring of solution, the oil stain gradually separates from the metal surface and enters the solution, forming a very fine spherical emulsion.

With the progress of science and the development of technology, people are more and more aware of the importance of environmental protection, resource conservation and rapid economic development. The research and development of water-based non-toxic and low energy consumption coatings to replace the traditional oil-soluble coatings has become the investment hot spot of the coating industry all over the world. In the past, water-based paint paste was mainly used in textile pigment printing and watercolor ink for art advertising. Now it has been gradually extended to the fields of architectural coating, carton printing ink, metal coating, wood paint and so on.

Surfactants commonly used in aqueous paint pastes, such as castor oil polyoxyethylene amide, fatty alcohol polyoxyethylene ether silane and fatty alcohol polyoxyethylene ether, have a good wetting and dispersion effect on pigment particles, but have an impact on the consistency, leveling and foaming of the system.

Surfactants commonly used in aqueous paint pastes, such as castor oil polyoxyethylene amide, fatty alcohol polyoxyethylene ether silane and fatty alcohol polyoxyethylene ether, have a good wetting and dispersion effect on pigment particles, but have an impact on the consistency, leveling and foaming of the system.

The interaction between weak pigment particles and surfactants is another case. At the water-solid interface, surfactants give full play to the natural affinity of hydrophilic and hydrophobic groups in their molecules and selectively locate on both sides of the interface.

The solubilization of oil by surfactant micelles may be an important mechanism for removing a small amount of liquid dirt from the solid surface. Various organic substances insoluble in water are added to different parts of the micelle due to their different properties to form a transparent and stable solution. The non-polar oil is added and dissolved in the non-polar core of the micelle

At present, when the material departments or industrial departments conduct scientific research on inorganic powder, they often use ball milling to obtain inorganic powder with narrow particle size distribution or ultra-fine powder. Crushing itself is also a reversible process. Large particles are crushed into small particles, and small particles can also coalesce to form large particles.

The application of surfactants in the field of nano material preparation has been familiar to everyone, and from another point of view, the development of nanotechnology has entered the stage of "the difficulty is not how to prepare nanoparticles, but how to establish the relationship between macro and micro, and how to apply nano materials", The role of surfactants in the application of nano materials is very important.

Surfactants can be divided into anionic, cationic, amphoteric and non-ionic types according to whether their groups can be ionized and the properties of ionized groups. It is generally composed of nonpolar lipophilic groups and polar hydrophilic groups. The two groups are located at both ends of the molecule to form asymmetric hydrophilic and hydrophobic structures.

In the treatment and recovery of ceramic industry wastewater such as slurry and glaze slurry wastewater, precipitant or flocculant is often added. Its function is opposite to that of dispersant, which can promote the destabilization and aggregation of colloidal system, so as to improve the dehydration of mud and grouting efficiency.

The environmental protection performance of surfactants mainly refers to the toxicity and biodegradability of surfactants and the improvement of the absorption rate of surfactants to other chemical materials.

Surfactants are widely used in engineering because of their special properties, such as permeability, antistatic, wettability, solubilization and so on. The application of surfactants can also be seen everywhere in people's daily work and life.

Surfactant can promote the deformation or destruction of the surface by adsorbing on the structural defects on the surface of mineral solid particles. That is, the adsorption of grinding aid molecules on particles reduces the surface free energy of particles or causes dislocation migration of surface lattice, resulting in point defects or line defects, so as to reduce the strength and hardness of particles and promote the generation and expansion of cracks.

Foam plays an important role in washing. Although the foam itself has no decontamination effect, it can carry dirt and can indicate how much detergent is decontamination.    

When making mold in construction industry, adding APG into concrete can play the role of demulsifier, thickener, dispersant and dustproof agent.

Anionic surfactants can also be used to modify at. Jin Yeling and others modified dolomite attapulgite with stearic acid and used it to fill natural rubber and styrene butadiene rubber. The results show that the filling amount of dolomite Attapulgite Modified by stearic acid in the compound is greatly increased, which can reach 110 g / 100 g.

In home decoration, the commonly used kitchen sealant is divided into two types according to its properties: neutral sealant and acid sealant. The places where sealant is generally used in home decoration are: the dumb mouth on the back of wood line, sanitary ware, toilet, cosmetic mirror in the bathroom, the gap between wash basin and wall, etc.

The flame retardant lacks chemical combination with fiber-forming macromolecules, and its durability is poor. The hand feel and strength are also affected, which greatly reduces its wearing performance.