The amount of adsorption on the surface increases with the increase of the concentration of the solution. When the concentration reaches or exceeds a certain value, the amount of adsorption does not increase. These excessive surfactant molecules are disorderly or exist in a regular way in the solution. Practice and theory show that they form associations in solution, which are called micelles. Surfactant molecules are amphiphilic molecules with hydrophilic and lipophilic groups. Water is a strong polar liquid. When surfactant dissolves in water, according to the principle of polarity similarity and polarity difference and repulsion, its hydrophilic group and water are induced to dissolve in water, and its hydrophilic group and water repel and leave water. As a result, surfactant molecules (or ions) are adsorbed on the two-phase interface, which reduces the interfacial tension between the two phases. The more surfactant molecules (or ions) are adsorbed on the interface, the greater the interfacial tension decreases.

Surface chemical modification is to finish surface modification by local coating on the surface of inorganic particles by chemical reaction or chemical adsorption between surfactants and inorganic particles. Liu Qian and other surfactants used polyethylene glycol to treat SiC ultrafine particles. Polyethylene glycol molecular chains were modified on the surface of SiC particles, which acted as a steric barrier to prevent the reunion of solid SiC particles. Surfactant-treated SiC powders with irregular shape or agglomeration can adsorb long molecular chains of surfactants on surface defects and suspended bonds of particles, accelerate the disintegration of large particles or agglomerated particles, and improve the dispersion of SiC particles.

According to the characteristics of surfactants, 9 types of surfactants were selected, 7 of them were selected and deinking experiments were carried out with a single surfactant. Five compounds with better effect were selected. The optimum formulation 3 was studied by orthogonal experiment. The optimum technological conditions were A3B2C1D3 with pulp consistency of 9%, deinking agent dosage of 0.8%, deinking temperature of 50 C, deinking time of 50 min and brightness of Newsprint Pulp of 56.1% after deinking.

In situ remediation, the use of biosurfactants will have a certain toxicity and impact on the indigenous microbial populations living in them. In addition, their metabolites may be more toxic because they can be degraded by microorganisms. Therefore, the existence of biosurfactants may cause some pollution to the environment and increase the burden of environmental pollution. It can be seen that strengthening the research on the potential impact of biosurfactants on the environment and their biodegradation characteristics will provide an important scientific basis for effectively controlling the environmental pollution caused by biosurfactants and rationally utilizing biosurfactants. In order to ensure the safety of biosurfactants, comprehensive toxicity and environmental hazard experiments of biosurfactants must be carried out in the field of surfactant solubilization and remediation.

In solution, surfactant molecules migrate to the surface of solvents, reducing surface tension (water or other solvents). The polar groups of surfactants are directed directly towards the surface of the solvent and hydrocarbon chains are extended into the air. This distribution makes the surface force balance, and consequently the surface tension decreases. The surface tension remained constant after decreasing to the critical micelle concentration, and the surfactant molecules were distributed on the surface of the solvent until the monolayer structure was formed. Surface tension helps to design effective ink. Because the color coating process and these parameters have a great relationship. Many defects in the coloring layer can be attributed to surface tension.

When we use chemical products, we must first understand what safety technical requirements it has in order to better ensure personal safety, especially in production, we often use some chemicals or equipment, so we must understand some technical operating guidelines, then take polyether amine as an example, we are simple. Let's get to know. (1) Technology for preventing accidents of all kinds. For example, in the process of chemical production, fire prevention, explosion proof, safe storage and transportation of chemical dangerous goods, safe use, maintenance, overhaul of pressure vessels and equipment, personal protection, mathematical and statistical analysis of accidents, and safety system engineering, etc.

Biodegradation of surfactants is one of the most widely studied methods, and has been adopted by some sewage treatment plants. The method can be roughly divided into activated sludge method, anaerobic digestion method and the method of utilizing soil self-purification. They all use the characteristics of microorganisms that can utilize surfactant as the sole carbon source to complete the degradation of surfactant.

In solution, surfactant molecules migrate to the surface of solvents, reducing surface tension (water or other solvents). The polar groups of surfactants are directed directly towards the surface of the solvent and hydrocarbon chains are extended into the air. This distribution makes the surface force balance, and consequently the surface tension decreases. The surface tension remained constant after decreasing to the critical micelle concentration, and the surfactant molecules were distributed on the surface of the solvent until the monolayer structure was formed. Surface tension helps to design effective ink. Because the color coating process and these parameters have a great relationship. Many defects in the coloring layer can be attributed to surface tension.

Booth No. E5. A47

Booth No. 610

Surfactant alkyl glycoside is a substance that can reduce the interfacial tension between liquid, liquid, solid and gas. It has the functions of solubilization, emulsifying and wetting, and can dissolve those insoluble petroleum hydrocarbon compounds and other organic compounds. Thereby improving the desorption efficiency of organic pollutants in the soil. The surface active molecules are amphiphilic molecules, that is, the hydrophilic group and the lipophilic group form a hydrophilic group, so that the surface active molecules are soluble in water, and the lipophilic group makes the surfactant molecules soluble in the oil phase gasoline. The tendency of kerosene, animal and vegetable oils, various fats, aromatic compounds, and some liquid organic substances that are not compatible with water.

The surface chemical modification is to locally coat the surface of the particles by chemical reaction or chemical adsorption of the surface of the inorganic powder particles to complete the surface modification.

Many chemically synthesized alkyl glycoside surfactants destroy the ecological environment due to their refractory, toxic and accumulation in the ecosystem. In contrast, biosurfactants are biodegradable and non-toxic to the ecological environment. It is more suitable for pollution control in environmental engineering. For example, in the wastewater treatment process, it can be used as a flotation collector to absorb the charged metal particles to remove toxic metal ions, and to repair sites contaminated by organic matter and heavy metals.

China's surfactant industry began in the 1950s and has long been used mainly in the production of synthetic detergents. With the intensification of market competition, manufacturers have shifted their focus to industrial surfactants. The increase in the consumption of industrial surfactants has led to the rapid development of China's surfactant industry. Especially in the past 20 years, China's surface activity The agent industry is in a state of rapid development. The alkyl glycoside developed in the late 1980s and early 1990s is regarded as a world-class surfactant by domestic and foreign experts.

Alkyl glycosides can be applied in many industries and fields, such as washing, cosmetics, food processing, textile printing, pesticides and pharmaceuticals. As a raw material for non-ionic neutral detergents, they have broad application prospects. For high-grade clothing cleaners. In addition, alkyl glycosides have a broad spectrum of antibacterial activity against Gram-negative bacteria, Gram-positive bacteria and fungi.

In recent years, with the rapid development of the tanning industry, the variety and output of leather products have been increasing, and the grades are constantly improving. The demand for auxiliaries consisting of surfactants is also increasing, and such materials have become an indispensable material for the leather industry. In general, the amount of leather chemicals is small compared to the weight of leather,

Surfactant products are widely used in synthetic detergents, cosmetics, personal care products, textile printing and dyeing, food and other fields closely related to people's lives. With the rapid development of downstream industries and the continuous expansion of surfactant applications, In the future, the consumption of domestic alkyl glycoside surfactants will continue to grow rapidly, steadily. At the same time, with the improvement of the technical level of domestic surfactant manufacturers and the continuous expansion of production scale, China's surface The international competitiveness of active agent products will be further enhanced, and the demand of foreign customers for our products will continue to grow steadily.

In general, the surface tension of the fiber surface is relatively low and is not easily wetted by water. Wetting theory states that in order for a fiber having low energy surface properties to be completely wetted by water, the surface tension of the water is required to be equal to or less than the critical surface tension of the fiber.

The polysaccharide is synthesized by a transglycosylation method to synthesize an alkyl glycoside. Alkyd polyglycoside (APG) has the characteristics of anionic and nonionic surfactants, low surface tension, high activity, strong decontamination ability, rich and delicate foam, stable, non-toxic, non-irritating, It has good compatibility and easy degradation, and can be widely used in various fields of chemical production. It is called “green” surfactant.

Certain nonionic emulsifiers are the primary surfactants used in the cosmetic industry. As an emulsifier for formulating skin care lotions, alkyl glycosides must have good compatibility and compatibility. In order to meet the requirements of safety, viscosity, drainage, etc., the polyether-modified silicone-containing silicone surfactant is an emulsifier alkyl phosphate ester, amino acid surfactant, commonly used in the preparation of silicone oil emulsion. A fatty acid ester derivative of a glucoside and a sucrose ester alkyl glycoside polyglycerol fatty acid are also commonly used emulsifiers.