An important role of gas phase silica in defoamers is adsorption. Due to the small particle size, large specific surface area, high surface energy, and three-dimensional network structure, silica can form a huge force of adsorbing bubbles, which together with silicone oil constitutes a force to attack bubbles, that is, silica adsorbs and impacts. Bubbles cause weak points. Under the action of the low surface tension of silicone oil, the bubbles are broken and the bubbles are broken. Therefore, the gas phase method of white carbon black is equivalent to "needle tip" in the defoamer, with a small amount but a great effect. It and silicone oil are the active ingredients of high-efficiency defoaming agents, and they have a compound high-efficiency and synergistic defoaming effect.

Due to its special three-dimensional network structure, the adsorption of fumed silica is the strongest of all silica types. Therefore, under the same conditions, the defoaming agent containing fumed silica The effect is the best. Therefore, if you want to obtain a high-performance, composite defoamer, it is recommended to use gas phase silica.