The present work is an experimental development to study the performance of the encapsulation agents for orange essential oil in a spray drying process. The emulsion to be dried was prepared by adding the oil to an aqueous solution of the wall material. Three different cases were studied having respectively capsul (5.0%, 0.0% and 10.0%) and arabic gum (5.0%, 10.0% and 0.0%) with 36.0% maltodextrin, 44.0% water and 10.0% essential oil. Retention of active material (essential oil) was the key to evaluate drying curves and microcapsules structural surface. The spray drying process used 220ºC and 110ºC for inlet and exit air temperature at the drying chamber, respectively while rotation of atomizer was 20.000 rpm. Best results were for microcapsules obtained from the emulsion with 10.0% capsul and 0.0% arabic gum. The drying at constant rate is short with higher moisture. These microcapsules shoved higher essential oil retention and less folds at surface due to lower drop swelling effect during drying.
microencapsulation; microcapsules; essential oil; spray drying; wall material
