CHARACTERISTICS AND APPLICATIONS OF NONIONIC SURFACTANTS

There are many types of Surfactants, which are widely used and involve various fields of human activities. Therefore, the production status of surfactants is also a factor to measure the level of chemical development of a country. my country is a major producer of surfactants and is currently the second largest producer of surfactants after the United States. The following describes an important variety of surfactants-nonionic surfactants.

Surfactants are widely used in various fields such as textiles, leather, daily chemicals, agriculture, oil fields, mining, and construction because they can significantly reduce the interfacial tension of materials. They are indispensable chemical additives in many industrial sectors. Although the amount of surfactant is small, it has a great effect. It is mainly divided into anionic, nonionic, cationic and amphoteric surfactants.

Among the above four types of surfactants, non-ionic surfactants are the most important type of raw materials. Compared with Anionic Surfactant,non-ionic surfactants have higher emulsifying ability, excellent wetting and washing functions, a certain degree of hard water resistance, and can be used together with other ionic surfactants. They are detergents and emulsifiers. An indispensable ingredient in the formula.

Application in leather processing

The leather production and processing process is a complex process, including several processes such as leather pretreatment, leather tanning, leather fatliquoring, leather dyeing and finishing. The Non-Ionic Surface-Active Agents involved in the leather pre-treatment process mainly play the role of penetration and degreasing, and generally use fatty alcohol ethers with strong penetration and emulsification. In the process of leather tanning, fatliquoring, dyeing and finishing, surfactants, as an indispensable ingredient, help various main materials to complete the process goals.

Non-Ionic Surface-Active Agents

Application in coal flotation

Flotation refers to the injection of air into the coal slurry. By adding a certain amount of surfactant, a hydrophobic film can be formed on the surface of the coal. The fine coal particles and bubbles adhere to the surface of the coal slurry, thereby High-purity clean coal is scraped off the surface of coal slurry. Adding non-ionic surfactants with low HLB value such as fatty alcohol polyoxyethylene ether and fatty acid ester polyether to the flotation agent for coal are compounded with foaming agents and collectors, which can improve the clean coal obtained by flotation. Save time, reduce the consumption of medicaments, reduce moisture, and increase the concentration of solids.

Application in textile printing and dyeing

Dyeing and finishing auxiliaries for textile printing and dyeing usually require good wetting of fabrics, strong solubilization and dispersing capabilities for dyes, and a certain affinity for dyes or fibers. In addition, according to special needs, it can have a certain softness or water repellent effect on the fabric. Therefore, the wetting, synergistic, dispersing, leveling, soft and water repellent effects of nonionic surfactants are of great significance to the textile printing and dyeing industry. Non-ionic surfactants are widely used in all stages of printing and dyeing processing.

Application in paper industry

Non-ionic surfactants can be used as pulp cooking aids to promote the penetration of the cooking liquor into the pulp fiber raw materials, accelerate the removal of lignin and pectin from wood or non-wood by the cooking liquor, and disperse cellulose and accelerate cooking Speed and increase the yield of pulp. Nonionic surfactants used as pulp cooking agent include alkylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, etc.