ON THE USE OF SACCHAROSE ESTERS IN THE PREPARATION OF O/W EMULSIONS WITH LIQUID CRYSTALS

The stability and the rheological properties of emulsions prepared with saccharose esters were studied regarding the amounts of the two emulsifiers used and their HLB. The satisfactory stability of these systems has been ascribed to the presence of alfa-gel phases, evidenced by polarised light microscopy and studied by rheological and water evaporation measurements. The possibility of enclosing pigments such as TiO2 and ZnO in these emulsions has also been verified.