1, naturally occurring glycolipids produced 2, function as a natural surfactant, emulsifier, foaming agent, fungicide, antibiot Rhamnolipids ... or two rhamnose sugars and fatty acids. Rhamnolipids function as a natural surfactant, emulsifier, foaming agent, fungicide, antibiotic, and ... or tan in color.Surfactants are in demand for a wide range of industrial applications as they increase solubility ...