Biosurfactants are the secondary metabolites of some microorganisms (bacteria, fungi, yeasts, etc.), which are accumulated in the culture solution in large quantities, causing significant changes in the surface tension, critical micelle concentration and other physical and chemical properties of the culture solution. Researchers usually use high-density fermentation method to make the content of Biosurfactant in the culture liquid reach a large level, and then obtain the finished product of surfactant through separation and purification, which has been applied in environmental pollution treatment and other aspects, and achieved good results.

The application principle of surfactant in water-based metal cleaning agent is to weaken or offset the adhesion of oil on the metal surface through the wetting, penetration, emulsification, dispersion, solubilization and other properties of surfactant, and accelerate the oil to leave the metal surface by mechanical and physical methods and enter the washing liquid to be emulsified, dispersed and suspended or solubilized in micelles.

Biosurfactants can be used as food additives in food industry. Lecithin and its derivatives, fatty lipids containing glycerol, sorbitan, ethylene glycol, derivatives of glycerol monoester, and recently synthesized oligopeptides are widely used as emulsifiers in the food industry. Emulsifiers not only play a role in dispersion, but also play a great role in the formation of appropriate viscosity and texture of products.

As we all know, environmental protection flame retardant is a kind of flame retardant. Environmental protection flame retardant is a composite material based on resin and rubber.

Flame retardant is an additive that can make the polymer not easy to ignite, and the fire makes it burn slowly. According to the classification of elements contained in flame retardants, they can be divided into organic and inorganic flame retardants.

Polyether Polyols (hereinafter referred to as polyether) are prepared by polymerization of initiator (compounds containing active hydrogen groups) with ethylene oxide (EO), propylene oxide (PO), epoxy butane (Bo) in the presence of catalyst.

The contribution of flame retardants to fire safety cannot be underestimated. Zhou Zhengmao said that studies in Europe, the United States and India have shown that flame retardants in upholstered furniture can slow down the spread of fire and provide valuable escape time for people.

Static electricity will disperse the tow to produce wool and broken ends, and it is not easy to wind. Using the ionic properties and moisture absorption of antistatic agents can effectively prevent the accumulation of static electricity. At the same time, the adsorption and orientation of antistatic agents also help to eliminate static electricity.  

In the production of petroleum products, in order to improve and improve the performance of petroleum products, we must also add various additives, which can be divided into antioxidant, antiwear agent, detergent, dispersant, viscosity regulator, pour point depressant, rust inhibitor, fuel energy-saving agent, etc. according to their functions, most of them belong to non-ionic surfactants.

Generally speaking, the cloud point of surfactant aqueous solution can indicate the ability of its hydrophilic group to form hydrogen bonds with water molecules. At the same concentration, the longer the EO chain of non-ionic surfactant, the higher the cloud point of its aqueous solution. This is mainly because the EO chain can form hydrogen bonds with water molecules.

Generally speaking, the dispersing ability of surfactants depends on the molecular weight and the characteristics of hydrophobic groups. Generally, hydrophobic surfactants with large molecular weight diffuse slowly to the particle surface, but they have strong adsorption ability and are not easy to transfer from the surface, which can provide long-term stability of pesticide formulations. Therefore, the molecular weight of hydrophobic groups in surfactants is gradually improving.

Alkyl glucoside APG can be used as crease proofing agent for cotton cloth, powder dispersant for aqueous solution and dust proofing agent in textile industry. APG is suitable for refining, dyeing and other processing.

Whether the flame retardant is environmentally friendly is not determined by any organization or environmental label, but by the structure and performance of the flame retardant itself.

Surfactant can wash, emulsify, foam, wet, soak and disperse, and the amount of surfactant is small (generally a few percent to a few thousandths). It is easy to operate, non-toxic and non corrosive. It is an ideal chemical product, so it has important applications in production and scientific research. At the same concentration, the non-polar component of surfactant is large, and its surface activity is strong. That is, among homologues, the surface activity with more carbon atoms is greater. However, when the carbon chain is too long, it has no practical value because of its low solubility in water.

Flame retardants exert their flame retardancy through several mechanisms, such as endothermic effect, covering effect, inhibition of chain reaction, asphyxiation of non combustible gases, etc. Most flame retardants achieve the purpose of flame retardation through the joint action of several mechanisms.

Surfactant is a kind of soluble and concentrated on the surface of liquid or the interface between liquid and immiscible objects. Its molecules can adsorb two substances with different properties. Surfactants can be divided into oil soluble (such as oleic acid, petroleum acid, yellow flower petroleum acid, etc.) and water soluble (such as soap).

Is it feasible to test the flame retardancy of flame retardants with lighters?

Aluminum hydroxide flame retardant has the advantages of non-toxic, good stability, no toxic gas under high temperature, and can also reduce the amount of smoke when plastic is burning.

There are many misunderstandings in the selection of additives in most enterprises, mainly in the following four aspects.

Alkyl glycoside APG can be stored for a long time in a large temperature range. At the same time, it has the function of humidification, which fully meets the performance requirements of active components for cosmetics.