Anionic surfactant
Anionic surfactants are a type of surfactants that are characterized by the ability to generate hydrophobic anions in water.
In the production of surfactants, anionic surfactants are the product with the largest output and the most varieties. It is the main active component of daily chemical products, detergents and cosmetics, and is also widely used in many other industrial fields. Anionic surfactants can play an important role in both industrial and civil fields. [1]
Chinese name
Anionic surfactant
Foreign name
anion surfactant
Sex Quality
A type of surfactant
Special Point
Can generate hydrophobic anions in water
Should Use
Agriculture, industrial cleaning, daily chemicals, etc.
Example Example
Soap, sodium alkyl sulfonate, sodium alkyl sulfate, etc.
Product Introduction
Name: anionic surfactant; anion surfactant
A type of surfactant. Hydrophobic anions can be generated in water. For example, soap can generate anion r·COO with a long-chain fatty acid group in water. Mainly include soap, sodium alkyl sulfonate, sodium alkyl aryl sulfonate, sodium alkyl sulfate, sodium secondary alkyl sulfate, etc. Commonly used as detergents, wetting agents, emulsifiers and dispersants. It cannot be used together with cationic surfactants, as it will form precipitates in aqueous solutions and lose effectiveness. However, it can be used with non-ionic surfactants. [1]
Apply
Anionic surfactants have many advantages such as mature production technology, easy availability of raw materials, and wide application range. Therefore, it is widely used in agriculture, industrial cleaning, textile printing and dyeing, daily chemicals and many other fields.
1. Agriculture
Using anionic and nonionic compounds as pesticide emulsifiers can reduce the amount of emulsifier from 20% to 40% to 3% to 10%. This is conducive to improving the chemical stability of pesticides, while reducing costs and pollution, and improving the efficiency of pesticide utilization. In addition, alkyl benzene sulfonates, lignin sulfonates, etc. are often added to pesticides, rust removers, and plant growth regulators as emulsifiers and wetting agents, which can be used to improve soil.
2. Construction industry
In architectural coatings, surfactants mainly play the roles of wetting, emulsifying, dispersing, stabilizing and anti-static.
3. Cosmetics industry
Anionic surfactants are increasingly used in cosmetics. Their main functions are as emulsifiers, solubilizers, wetting agents and effective component synergists. The most important consideration for the widespread use of anionic surfactants in this field is their pharmacological and toxicological safety.
4. Petroleum industry
Surfactant plays an important role in the chemical oil flooding process. It can reduce the oil/water interfacial tension and increase the number of capillaries, thus greatly increasing the oil recovery rate. [2]
5. Textile industry
Many processes in the textile printing and dyeing industry require the use of large amounts of surfactants. For example, a large amount of anionic surfactants with cleaning effects are used in the pre-treatment process, and anionic surfactants with penetrating effects are used in the dyeing and post-finishing processes. In addition, some functional products such as leveling agents, color fixing agents, etc. have anionic structures.
6. Daily chemical industry
Anionic surfactants are widely used in daily chemicals. The most common soap is anionic surfactant, and its main component is sodium stearate. Anionic products have the characteristics of high and fine foam and low price, which can reduce the cost of laundry detergent, dishwashing liquid and other products, and improve product transparency. [1]
Development trends
Great progress has been made in the research on carboxylate and sulfate anionic gemini surfactants. Their preparation method is simple, their structures are diverse, and their surface properties are significantly better than those of corresponding non-gemini surfactants. However, the research at home and abroad is still relatively fragmented so far, and comprehensive and systematic research on these surfactant molecules is still lacking.
We hope that domestically we can conduct comprehensive and systematic research on structural types that have simpler synthesis methods, lower costs, and less waste.Shows the effects of hydrophobic chain length, linker length and type, hydrophilic group type and connection method on critical micelle concentration, minimum surface tension, lipophilic/hydrophilic balance, Kraft point, foamability, wettability and other properties. and its laws, while strengthening compounding and application research. [3]
1. The overall usage will continue to grow steadily
With the rapid development of my country’s economy and society and the continuous improvement of people’s living standards, the detergent, cosmetics and surfactant industries that are closely related to people’s lives will develop rapidly. In addition, the expansion of surfactants in various industrial application fields has greatly increased their market demand and stimulated the innovation and development of surfactants.
2. New products will continue to emerge
Surfactants with excellent performance and competitive prices produced using natural renewable resources as raw materials will receive special attention and develop rapidly. Judging from the general development trend, it is not only possible to produce new surfactants by replacing petrochemical raw materials with natural oils, starches, proteins, sugars and other raw materials, but it is also an inevitable trend and direction.
3. Production specialization and scale
In recent years, surfactant production has gradually developed towards specialization and scale.
4. Overcapacity and fierce competition will be inevitable
Although the overall consumption of anionic surfactants in my country will continue to grow steadily, the production capacity of manufacturing enterprises is expanding faster, resulting in the current overcapacity situation. It is expected that the overcapacity will be even greater in two or three years. serious.
As competition among surfactant manufacturers will become more intense, industry restructuring and reshuffle will be inevitable. Continuously developing new products, improving production processes and product quality, while strengthening internal management of enterprises, reducing costs and consumption, and improving the overall competitiveness of enterprises will become the decisive factor in whether surfactant manufacturers can stand out in the competition. [1]
