Foaming and defoaming

Excellent performance at low temperature, low foam and defoaming of food soils, no spotting, etching or streaking on glassware. ... 

Physicochemical Fundamentals of Surfaces with regard to Foam and Defoaming... 

Surfactants are of great importance as auxiliaries for the production and processing of crude oil and gas (emulsifiers, agents for foaming and defoaming, lubricants, bactericides, corrosion inhibitors, de-emulsifiers, etc.). In particular, tertiary oil production represents a broad field for such applications. 

Emulsions, foams and defoaming, microemulsion phase behaviour, coagulation theory Interplay of adsorption of polymers-surfactants-proteins, rheological properties, electrophoresis... 

Some of the major functional uses of lecithin products are as (1) emulsifiers in food emulsions, (2) solubilizing agents for various compounds in aqueous systems, (3) sol dispersing agents, and (4) foaming and defoaming agents. 

So far the discussion of foams and defoaming has centered on aqueous systems. While most organic hquids will do not form stable foams, the presence of polymers and oil-soluble amphiphiles can result in persistent foams, whether wanted or unwanted. 

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