Principle of action of defoaming agent
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Defoamer plays a role in the formation or after the formation of thin foam.
Dispersing uniform defoamer permeates into the foam elastic film and distributes in the membrane, resulting in thin layer rupture through the decrease of surface tension.
Dispersing uniform defoamer penetrates into the foam thin layer and forms a monolayer, which reduces adhesion and is prone to lamina rupture.
There is a third mechanism for defoamers with hydrophobic particles. These hydrophobic particles reach the surface of the thin layer and adsorb surfactants on the top of the thin layer. The thin layer ruptured due to the absence of surfactant.
