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.

Blended silicone rubber is a kind of synthetic rubber with excellent comprehensive performance, which can be widely used in aviation, cable, electronics, electrical appliances, chemical industry, instrumentation, cement, automobile, construction, food processing, medical devices and other industries, as well as for molding, extrusion and other mechanical deep processing.

The gentleness of surfactants to human skin, eyes and hair, especially to skin and eyes, is a concept that is difficult to define. Up to now, there is still no unified standard.

A. Sucrose fatty acid ester defoamer sucrose fatty acid ester is an internationally recognized food additive with good safety. It can be used as food emulsifier and sugar cooking assistant. Several domestic enterprises have produced such products.

Alkyl glucoside, abbreviated as APG, is synthesized from renewable natural fatty alcohol and glucose. It is a new type of non-ionic surfactant with comprehensive performance. It has the characteristics of common non-ionic and anionic surfactants. It has high surface activity, good ecological safety and miscibility. It is internationally recognized as the preferred "green" functional surfactant.

Alkyl polyglycoside (APG) is a new generation of environmental friendly green surfactant, which is made from natural or renewable resources. It is a new type of non-ionic surfactant.

With the increasing demand of detergent and surfactant industries, the fatty alcohol market is in rapid development. Fatty alcohols are mainly used to produce lubricants, mineral flotation agents and emulsifiers. The market is growing with the rapid development of the food, metal processing, personal care, textile, pharmaceutical, papermaking and agrochemical industries. In addition, the increasing demand for sustainable and biodegradable products has also promoted the development of this market.

With the continuous development of our economy, there are more and more unsafe factors in our life. For example, fire also happens from time to time. At first, we can not control this phenomenon. However, with the development of our science and technology, in order to prevent the occurrence of fire, people have developed flame retardants, which effectively prevent the unlimited spread of fire. So how do flame retardants prevent the spread of fire?

Alkyl glucoside (APG) is a new type of non-ionic surfactant which has been industrialized since 1990s. Alkyl glycosides are mixed products (mono glycosides, di glycosides, tri glycosides, etc., so they are also called alkyl polyglycosides) obtained by the loss of water under the catalysis of acid from the semiacetal hydroxyl and fatty alcohol hydroxyl of glucose.

Silicone rubber is a kind of rubber whose main chain is composed of silicon and oxygen atoms alternately, and the silicon atoms are usually connected with two organic groups. Ordinary silicone rubber is mainly composed of siloxane chain links containing methyl and a small amount of vinyl. The introduction of phenyl can improve the high and low temperature resistance of silicone rubber, while the introduction of trifluoropyl and cyano can improve the temperature and oil resistance of silicone rubber. Silicone rubber has good low temperature resistance and can still work under -55 ℃.

Zhouzhengmao, Secretary General of China flame retardant society, introduced that the increase of urbanization rate has brought about dense buildings and an increase in population density. At the same time, technological progress has also brought more and more electrical equipment and electronic products into the home, resulting in a significant increase in fire hazards.

In addition to the cleaning effect of the above cleaning agent, the emulsion prepared from surfactant also has the similar dissolution principle of solvent. The existence of internal oil phase will greatly enhance its dissolution and cleaning effect on oil stains.

The test set up two treatments with and without surfactant (APG) and control (CK), and each treatment was repeated for 3 times. The addition amount of surfactant APG is 100mg kg − 1 (stacking). During the stacking process, samples were collected from different parts of the compost on the 0d, 3D, 5D, 7d, 14d, 21d and 28d of the compost, and the microbial quantity and enzyme activity of the compost were determined after full mixing. The test lasted 30 days (from August 11 to September 9, 2008).

Some biosurfactants can promote the removal of heavy metal ions from soil particles. The remediation effect of these biosurfactants on heavy metals in soil depends on their anionic (negatively charged) nature. They can adsorb to the soil and combine with heavy metal ions, so that they can be separated from soil particles into soil solution and combined into surfactant micelles.