Reaction mechanism of defoamer

The defoamer can promote the drainage of the liquid film, thus causing the bubble to burst

Adding a substance that accelerates the drainage of the bubble film (defoaming agent) can defoam. If the bubble film is thick, the process of draining to 30~40nm is long, and the self-healing effect of the bubble film is strong, and the bubble film has good elasticity, so the bubble life of the thick bubble film is long, and the bubble film drainage rate can reflect the bubble. The stability. The liquid film discharge rate is fast, so that the liquid film becomes thinner, and the bubble bursts when it is thin enough.

Adding hydrophobic solid particles can cause bubbles to burst

In the foaming water system, adding hydrophobic silica (that is, hydrophobic silica) particles alone can defoam. The hydrophobic silica particles attract the hydrophobic end of the surfactant on the surface of the bubbles, and the hydrophobic particles become hydrophilic particles and enter the water phase to complete the defoaming effect. The solid particles of hydrophobic silica are generally white carbon black particles treated with methyl silicone oil, silazane or DMC. It is partially immersed on the surface of the bubble to reduce the local surface tension of the bubble, plus the effect of solid particles. Inserting a bubble like a needle tip accelerates the bursting of the bubble. Therefore, defoamers containing hydrophobic silica generally have better defoaming effects.

Amber Zhang Ms.

Foreign trade 

Zhejiang Ruico Advanced Materials Co., Ltd. (Stock No.873233)

Add: No.188, Liangshan Road, Linghu Town, Nanxun District, Huzhou City, Zhejiang Province, China 313018

Phone: +86 (572) 2903236

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Website: www.ruicoglobal.com 

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