ENCAPSULATION OF RED GINGER OLEORESIN (ZINGIBER OFFICINALE VAR RUBRUM) WITH CHITOSAN AS WALL MATERIAL

摘要

Objective: The objective of this research was to determine the effect of temperature spray drying the encapsulation efficiency of red ginger oleoresin and characterization morphological of microcapsules with scanning electron microscope (SEM). Methods: Encapsulation method begins by making an emulsion of red ginger oleoresin dispersed into chitosan 1% with ratio 1:1; 1:2; 1:3 (oleoresin: chitosan) and tween 80 as emulsifier, then stirred using a homogenizer. Emulsion flowed into a spray dryer with a variation of inlet temperature 180, 190 and 200°C. Results: The initial stage encapsulation process was the formation of the emulsion to form droplets. Droplets size of emulsion tends to increase by increasing the chitosan concentration. Droplet size obtained approximately 216.4 to 2109.2 nm, the encapsulation efficiency based from surface oil and oil retention values. Encapsulation efficiency varied form 93.62 to 99.14 %. The lowest encapsulation efficiency obtained at 1:1 wall material ratio and drying temperature 180°C and the highest encapsulation efficiency obtained at 1:3 wall material ratio and drying temperature 200°C. SEM analysis is used to determine the morphology of the microcapsules, the results obtained that the spray dryer at a temperature of 180 and 190 obtained microcapsules are shrunken, while at 200 o C obtained microcapsules with smooth surfaces. FT-IR spectra for red ginger oleoresin microcapsules seemed identical to the FT-IR spectra of chitosan. No absorption peaks that indicate a new functional group Conclusion: The results found that the ratio 1:3 of wall material and the temperature of spray drying 200°C produced the higher encapsulation efficiency of 99.15%.