A defoamer is a chemical that eliminates foam. According to different classification criteria, defoamers can be divided into various types. For example, defoamers can be divided into natural defoamers and synthetic defoamersAccording to different functions, defoamers can be divided into antifoam agents and defoaming agents. In addition, according to the different mechanisms of action, defoamers can be divided into surfactant type, polymer type, polyether type, silicone type, etc.
The process of foam elimination by a defoamer typically consists of three steps: foam generation, foam stabilization, and foam elimination. When foam is formed, the gas in the foam is surrounded by a liquid, forming a gas-liquid interface. In this case, the defoamer destroys the stability of the foam by reducing the tension at the gas-liquid interface, causing the foam to gradually shrink until it disappears. In addition, the defoamer can also increase the fluidity of the liquid film by adsorbing and spreading on the surface of the liquid film, so that the liquid film thins until it bursts, thereby eliminating foam.
In conclusion, defoamers, as an important chemical substance, play an increasingly important role in industrial production and daily life. In the future, with the continuous improvement of environmental protection and other needs, defoamers will continue to innovate and develop, bringing more convenience and benefits to our production and life.