Surfactant and water can form a film of certain strength

2023-02-12 11:04:20

The use of surfactants in the flotation of ore is to use the floating effect. Stir and blow air from the bottom of the pool, the bubbles with effective mineral powder gather on the surface, collect and defoam and concentrate, thus achieving the purpose of enrichment. The mud, sand and rocks without ore are left at the bottom of the pool and should be removed regularly. When 5% of the ore surface is covered by the trapping agent, the surface becomes hydrophobic, and it will attach to the air bubbles and rise to the liquid surface for easy collection. Choose a suitable collector so that its hydrophilic groups only absorb on the surface of the ore, and its hydrophobic groups face the water.

Surfactants are also widely used in the pharmaceutical industry. In medicaments, many insoluble drugs such as volatile oil-soluble cellulose and steroid hormones can form transparent solutions and increase concentration by solubilizing surfactants; in the process of medicament preparation, it is an indispensable emulsifier, wetting agent agent, suspending agent, foaming agent and defoaming agent, etc. A "bubble" is a gas surrounded by a thin film of liquid.

Some surfactants and water can form a film with a certain strength, which surrounds the air and forms foam, which is used for flotation, foam fire extinguishing, washing and decontamination, etc. This active agent is called a foaming agent. Sometimes defoamers are also used. In the process of making sugar and traditional Chinese medicine, there are too many foams. Appropriate surfactants should be added to reduce the film strength, eliminate air bubbles, and prevent accidents.

It can be used as a bactericide and disinfectant in the pharmaceutical industry. Its bactericidal and disinfectant effects are due to their strong interaction with bacterial biofilm proteins to denature or lose their function. These disinfectants have relatively large solubility in water. According to Use concentration, can be used for skin disinfection before surgery, wound or mucous membrane disinfection, instrument disinfection and environmental disinfection.

Removing grease and dirt is a relatively complicated process, which is related to the effects of wetting and foaming mentioned above. A variety of auxiliary ingredients are usually added to the detergent to increase the wetting effect on the object to be cleaned, and also have the functions of foaming, whitening, and occupying the clean surface without being polluted again. The decontamination process of the surfactant as the main component is: the surface tension of water is large, the wettability to oil stains is poor, and it is not easy to wash off the oil stains. After adding the surfactant, the hydrophobic group faces the surface of the fabric and adsorbs on the dirt, so that the dirt is gradually detached from the surface. The dirt is removed after being suspended in the water or floating to the surface with the foam, and the clean surface is occupied by surfactant molecules.