Shanxian Chemical
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What Are Surface Active Agents
On surfactants
There are things in the world, and they can change their properties on the surface of things. This is called a surfactant. Its properties are different from those of ordinary things, and it involves a wide range of functions.
Surfactants have the nature of two parents. One end is hydrophilic, which is called hydrophilic; the other end is hydrophobic and hydrophilic, which is called hydrophilic. This unique structure makes it extraordinary at the interface.
Viewed at the liquid-gas interface, it can reduce the surface tension. On the surface of water, the tension is quite large. When the surfactant enters, the molecules gather on the surface. The hydrophilic group is arranged towards water, and the hydrophilic group is arranged towards gas in an orderly manner, resulting in a sharp decrease in surface tension. Such as common washing, the oil stains of the clothes are difficult to remove, and the surface tension of the water makes it difficult for the water to infiltrate the oil stains. With the addition of surfactants, it reduces the surface tension, and the water can spread over the clothes and penetrate into the fibers. The lipophilic base is combined with the oil stains, and the hydrophilic base is left in the water. After scrubbing, the oil stains are separated from the clothes and go away with the water.
At the liquid-liquid interface, it also has a miraculous effect. Oil and water are incompatible with each other, but surfactants are added to form an emulsion. Its molecules enter the oil-water interface, the lipophilic base enters the oil, and the hydrophilic base enters the water to form a protective film, preventing the oil droplets from coalescing, so that the oil is evenly dispersed in the water, or Such as the addition of emulsifiers in food, it can keep the emulsion stable, prevent stratification, and make the taste and texture better.
At the solid-liquid interface, surfactants can change the surface properties of solids. Hydrophilic solid surfaces, treated by it, can increase wettability; hydrophobic solid surfaces, or transferable hydrophilicity. In mineral flotation, according to the surface properties of minerals, select the appropriate surfactant, which can separate useful minerals from gangue. Useful mineral surfactants adsorb surfactants, change wettability, and float with foam to obtain concentrates.
In short, although surfactants are small, they are key in the chemical, daily chemical, food, pharmaceutical and other industries. The wonders of its nature, the wide use of it, the promotion of science and technology, and the goodness of life are really treasures in things, which cannot be ignored.
There are things in the world, and they can change their properties on the surface of things. This is called a surfactant. Its properties are different from those of ordinary things, and it involves a wide range of functions.
Surfactants have the nature of two parents. One end is hydrophilic, which is called hydrophilic; the other end is hydrophobic and hydrophilic, which is called hydrophilic. This unique structure makes it extraordinary at the interface.
Viewed at the liquid-gas interface, it can reduce the surface tension. On the surface of water, the tension is quite large. When the surfactant enters, the molecules gather on the surface. The hydrophilic group is arranged towards water, and the hydrophilic group is arranged towards gas in an orderly manner, resulting in a sharp decrease in surface tension. Such as common washing, the oil stains of the clothes are difficult to remove, and the surface tension of the water makes it difficult for the water to infiltrate the oil stains. With the addition of surfactants, it reduces the surface tension, and the water can spread over the clothes and penetrate into the fibers. The lipophilic base is combined with the oil stains, and the hydrophilic base is left in the water. After scrubbing, the oil stains are separated from the clothes and go away with the water.
At the liquid-liquid interface, it also has a miraculous effect. Oil and water are incompatible with each other, but surfactants are added to form an emulsion. Its molecules enter the oil-water interface, the lipophilic base enters the oil, and the hydrophilic base enters the water to form a protective film, preventing the oil droplets from coalescing, so that the oil is evenly dispersed in the water, or Such as the addition of emulsifiers in food, it can keep the emulsion stable, prevent stratification, and make the taste and texture better.
At the solid-liquid interface, surfactants can change the surface properties of solids. Hydrophilic solid surfaces, treated by it, can increase wettability; hydrophobic solid surfaces, or transferable hydrophilicity. In mineral flotation, according to the surface properties of minerals, select the appropriate surfactant, which can separate useful minerals from gangue. Useful mineral surfactants adsorb surfactants, change wettability, and float with foam to obtain concentrates.
In short, although surfactants are small, they are key in the chemical, daily chemical, food, pharmaceutical and other industries. The wonders of its nature, the wide use of it, the promotion of science and technology, and the goodness of life are really treasures in things, which cannot be ignored.
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