MARTINS, Wanderson da Silva.
Resumo:
Essential Oils (OEs) are complex natural mixtures of volatile substances widely
used in the food and cosmetic industries, but volatilize in exposure to air. The objective of
this study was to elaborate three microencapsulated formulations with different levels of
essential oil of Cymbopogon citratus (DC) Stapf (5, 10, and 15%), using maltodextrin DE 20
and gelatin as encapsulants, a fixed ratio of 4: 1 (m/m), respectively. The lyophilization
technique provided high yields in obtaining the microencapsulated systems. The techniques of
thermogravimetry and differential scanning calorimetry showed an improvement in thermal
stability and also a higher resistance to oxidative degradation. Among the formulations
studied, CL1 (5% of essential oil) is recommended, which presented higher yield, higher oil
retention and, therefore, more effective protection.
