How to destroy foam?

How silicone antifoam agents work?

Silicone has low surface and interfacial tensions (see Fig.1). This enables it to flow easily over the foam wall, and seeks out openings and occupies them, causing the wall to thin and collapse.

To effectively destroy foam, reducing surface tension is key. Silicone antifoaming agent work by lowering the surface tension of liquids, preventing bubbles from forming and enabling them to break apart more easily.

Silicone antifoaming agent

By dispersing smaller bubbles and inhibiting bubble growth, silicone antifoaming agent prevent large foam formations. This ensures stable, long-lasting defoaming, vital in industrial processes where foam control is crucial.

These actions, including surface tension reduction and bubble dispersion, are essential to achieving effective foam destruction and ensuring consistent, high-quality results in various applications.

Surface tension of common liquid

Liquid surface tension (mN/m)
water 73
Alkyd resin 33-60
Butyl glycol ether 30
Toluene 29
Isopropyl alcohol 22
Octane 21
Trisiloxane 17
Hexamethylsiloxane 16
Isopentane 14

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