Microparticles obtained by spray-drying technique containing ginger essential oil with the addition of cellulose nanofibrils extracted from the ginger vegetable fiber

Abstract

The encapsulation capacity and the polymer blends containing gum Arabic (GA), inulin (IN), and cellulose nanofibrils ginger (CNFG), extracted from the fibrous ginger residues, for the microencapsulation of ginger essential oil by spray-drying technique were evaluated in this study. The addition of CNFG improved the emulsifying properties of the formulations, with an increase in Newtonian viscosity (μ); however, the partial substitution of GA by IN decreased the viscosity. The higher IN levels increased the emulsion droplets in the formulations with and without the addition of CNFG. In addition, the emulsion droplets with smaller size resulted in the formation of pulverized droplets with smaller diameter. The presence of CNFG in the polymer blends exhibited similar instantaneization times and provided greater oil retention of ginger essential oil by spray drying. The oil retention in the formulation containing GA and CNFG was 12.23% higher than the formulation containing only GA. Changes in the retention of the compounds of pure and microencapsulated ginger essential oil were observed by GC-MS, all six major components remained in the final product, however with some variations on the encapsulated essential oil profile.