Influence of homogenization rate of O/W emulsions containing a mixture of green solvents and a polyoxyethylene glycerol ester

Abstract

The role of green solvents in the chemical and pharmaceutical industries is becoming more and more important. Thus, many of the classical solvents used in agrochemical formulations are being gradually withdrawn from the market in developed countries and replaced by solvents derived from renewable raw materials. Fatty acid dimethylamides are green solvents which may find applications in different fields [1]. We report in this chapter information on the development of emulsions containing a fatty acid dimethylamide and in addition DLimonene. The latter can be derived from lemon peel and find applications in cosmetics, detergency and food stuffs. Ethoxylated glycerine esters are ecofriendly and nontoxic surfactants [2], hence they can be tested as emulsifiers. Emulsions are unstable from a thermodynamic point of view, although they can exhibit a high kinetic stability. Most applications of emulsions rely on a long physical stability. Rheological tests conducted under linear conditions are sensitive to the microstructure of emulsions. However, they must be interpreted with caution when monitoring the physical stability of emulsions.