The principle of surfactant oxygenation: adding surfactant to aquaculture water can increase the saturation solubility of oxygen in aquaculture water. According to hydrate formation theory and double membrane theory, because the solubility of oxygen in water is very small, water oxygenate usually forms at the gas-liquid interface, and then slowly diffuses from the gas phase to the liquid phase. In the water containing surfactant, due to the solubilization of surfactant, a large amount of oxygen is dissolved in the surfactant micelles formed in the aqueous solution. Thus, the formation of water oxygenates in the surfactant aqueous solution can occur not only at the gas-liquid interface, but also within the water body, which reduces the formation time of water oxygenates and improves the oxygen content in water Solubility in.   

The surface tension and surface energy can be reduced by adding surfactant to the precursor of nano materials, so as to reduce the aggregation degree of solid or liquid particles in the dispersion system, keep the dispersion system relatively stable, and effectively regulate the size and morphology of nanoparticles.

Surfactants have lipophilic and hydrophilic groups, which are amphiphilic molecules. Water is a strong polar liquid. When surfactant is dissolved in water, according to the principle of similar polarity and opposite polarity, its hydrophilic group and water phase attract and dissolve in water, while its oleophilic group repels water and leaves water. As a result, surfactant molecules (or ions) are adsorbed on the interface of two phases, which reduces the interfacial tension between the two phases. The more adsorption of surfactant molecules (or ions) on the interface, the greater the reduction of interfacial tension.

Polyether amine in the use, need special attention, we must ensure the quality of the product, ensure its purity, not mixed by other substances, so we must pay attention to the following matters when using this kind of curing agent, so that we can better ensure the use effect of the product.

The selection of suitable surface modifier plays a decisive role in the preparation of nano ZnO. The application purpose and requirements of the treated object, particle size, particle size distribution, particle morphology, surface polarity and treatment process must be considered before use.

The different degree of polymerization of the same surfactant has a great influence on the size and dispersion of ZnO nanoparticles. Wu Wei et al. Studied the effect of PEG with different molecular weight on the size and dispersion of ZnO nanoparticles. The results show that nano ZnO modified by PEG in situ can disperse Zn (OH) 2 by adsorbing on the surface of Zn (OH) 2 precursor and depending on the steric hindrance effect produced by the long chain structure of PEG. If the molecular weight of PEG is too small, it can not play the role of steric hindrance. If the molecular weight of PEG is too large, the intermolecular force between particles will be enhanced and agglomeration will occur.

The development potential of flame retardants in the domestic market is still huge. With the further improvement and implementation of fire prevention and flame retardant laws and regulations in China and other emerging markets, the application areas and demand scale of flame retardants will be further expanded.

In the process of surfactant promoted bioremediation, different types of surfactants will get different remediation results due to their different characteristics, and if the critical micelle concentration is not reached, the surfactant has no solubilization effect. If the concentration is too high, it may inhibit the microbial degradation. Therefore, in the actual remediation of soil, surfactant with good type and concentration should be used.  

When the surfactant is added into the liquid, even if the concentration is very small, it will spontaneously cause a strong reduction of the surface or interfacial tension. Surfactants are amphoteric in structure. One end of the surfactant is hydrophilic and the other is hydrophobic. The amphoteric molecules will self orientate on the surface of the solution, the polar groups extend to the water, while the hydrophobic hydrocarbon groups extend to the air or oil interface, thus reducing the surface tension of the liquid. Surfactants can emulsify, disperse, solubilize, moisten, foaming, defoaming, lubricating, washing, softening, antistatic and anti-corrosion.

Biosurfactants are the rising star in the surfactant family. They are a kind of biological macromolecular substances with surface activity produced by microorganisms. Most of them are produced by bacteria, yeasts, fungi (molds). Biosurfactants produced by microorganisms can be divided into five categories according to their chemical composition and microbial sources, including glycolipids, fats, polysaccharide protein complexes, phospholipids and fatty acids or neutral lipids. Many microorganisms can secrete biosurfactants (see Table 1). Most biosurfactants are anionic, and their CMC is usually in the range of 1-200 mg / L, and its molecular weight ranges from 500 to 1500 da. A kind of

In the process of surfactant promoted bioremediation, different types of surfactants will get different remediation results due to their different characteristics, and if the critical micelle concentration is not reached, the surfactant has no solubilization effect. If the concentration is too high, it may inhibit the microbial degradation. Therefore, in the actual remediation of soil, surfactant with good type and concentration should be used.   

Friends who often use sealants will find that the adhesion effect caused by changing different products is also different. Some high-grade sealants imported from abroad have better effect, and some brand products are better. In short, there will be differences.

Containers for amino terminated polyether can be made of steel, aluminum, polyethylene or polypropylene. The storage temperature should not exceed 70 ℃. In order to prevent moisture absorption and oxidation, it is recommended to fill the container with nitrogen. We usually pack them in clean, dry, sealed, leak free galvanized iron drums. Keep away from the sun, rain and fire during storage. It is not restricted by the storage rules of flammable liquids, but it should be avoided to enter groundwater or surface water because it is not easy to be biodegraded.

The application of surfactants in the field of disinfection has developed rapidly in recent years, and the variety and quantity of related products approved for market are increasing. In summary, alkyl glycosides are mainly manifested in four aspects: 1) direct use of surfactants with bactericidal effect, and constantly introduce new varieties; 2) adding surfactants to traditional disinfection drugs to improve and improve the disinfection effect, so as to achieve the purpose of increasing efficiency;

According to the different types of sealant, different industries are used. No matter what industry is used, preparation measures should be taken before use. For example, for the use of door and window sealing, the dirty things on the doors and windows should be removed first, and then used, so as to increase the sealing effect.

Surfactants are substances that can significantly reduce the surface tension and interfacial tension of liquids. Their molecules are composed of polar hydrophilic group and nonpolar hydrophobic group. The hydrophilic part is carboxyl group, sulfate group, sulfonic group, amine group, quaternary ammonium group and hydroxyl group, while the hydrophobic part is represented by long-chain alkanes and aromatic hydrocarbons.

The mechanism of biosurfactant promoting the degradation of organic pollutants and the interaction between biosurfactants and degrading bacteria and substrates are still unclear. Although biosurfactants promote microbial degradation, they also have some inhibitory factors. For example, some surfactants are toxic to microorganisms when the concentration is above CMC, and some biosurfactants colloidal particles can interfere with cell processes.

When the amino terminated polyether is applied, its uncured foam is sticky to the skin and clothes. Do not touch the skin and clothing when using. The pressure of 5-6kg/cm2 (25 C) in the tank can not be touched. The temperature in storage and transportation should not exceed 50 C, so as to prevent the explosion of the foam tank in the tank. We should avoid direct sunlight, and strictly prohibit the contact of the children. The used styrofoam cans should not be thrown around. Burning or piercing empty cans is prohibited. Keep away from open fire and keep away from flammable and explosive materials. The construction site of amino terminated polyether should be provided with ventilation conditions. Construction personnel should wear work gloves, work clothes and goggles during

In the application of flame retardant, there are also various defects. There are few flame retardant products in powder coating industry on the market, and the flame retardant mechanism is different. In order to achieve better flame retardant effect, the dosage of flame retardant is generally about 5-10%, which will cause certain damage to the coating film, and will also be greatly affected in the process of powder coating processing.

The flame retardancy of plastic powder polymer is very poor, which is limited in many fields. The flame retardant powder coating has the functions of flame retardant, flame retardant and heat insulation. With the rapid development of industry, the requirement of flame retardant is more and more urgent. The substances that can play the role of flame retardant are mainly the N group and halogen group elements in the periodic table of elements. The commonly used compounds are n, P, Cl, Br, Mg, Al and other elements. Economic flame retardant products such as magnesium hydroxide and other compounds, similar to this kind of products, we call them flame retardants.