The fragrance and cosmetics industry intensely promoted the development of aroma molecules and studies on their structure-odour relationship leading to a good overall understanding. An aroma compound, also known as fragrance, is a chemical compound that has a smell. It can be found in various places, such as food, wine, spices, floral scent, perfumes, fragrance oils, and essential oils.
One subclass of aroma molecules are the so called
volatile surfactants which possess a higher volatility and dynamic interfacial activity at a time scale of milliseconds compared to conventional surfactants. However, these unique and powerful features of volatile surfactants have not been studied in depth so far.
To shed light on the influence volatile surfactants have on the interfacial behaviour, Soboleva at al. recently presented different measurements to evaluate the
structure-function relationship of volatile surfactants. In this work, aroma molecules as dynamic volatile surfactants were shown to possess functionality, like high dynamic activity and volatility, beyond the scent.
First of all, dynamic and static surface tension measurements were made by the maximum bubble pressure method and the pendant drop method to study the interfacial behaviour of volatile surfactants. The data demonstrated that volatile surfactants like linalool could decrease the surface tension of aqueous solutions on a time scale of milliseconds, much faster than conventional surfactants like sodium dodecyl sulfate (SDS), which typically takes seconds.