The defoaming effect of water-based defoamers stems from their unique defoaming mechanism. This article will delve into the defoaming principle of water-based defoamers from both physical and chemical perspectives.

Physical mechanism: mainly including surface tension reduction and liquid film drainage. The molecules of water-based defoamer can quickly diffuse to the surface of foam, reduce its surface tension, and make the foam wall thinner and easier to break. At the same time, defoamer molecules can also promote the drainage process of foam liquid film and accelerate the collapse of foam.
Chemical mechanism: it involves the destruction of foam stability and the inhibition of foam regeneration. Some aqueous defoamer molecules can react with the surfactant in foam to destroy its ability to stabilize foam. In addition, defoamer can form a continuous film on the surface of foam to prevent the regeneration of foam.
Comprehensive effect: The defoaming effect of water-based defoamers is the result of the combined action of physical and chemical mechanisms. In practical applications, different types of defoamers may focus on different defoaming mechanisms to achieve the best defoaming effect.