Study on processing of honeycomb polyphenol microencapsulation by spray-drying method

Spray- drying was employed for microencapsulation of honeycomb extract in this study and the microencapsulation coefficient of honeycomb polyphenol acted as a main inspect index.The result shows that: The embedding rate of microcapsule reaches the highest value of 46.6% at the condition of additives maltodextrin70%, arabic gum 4%, the inlet air temperature 180℃ and peristaltic pump feeding quantity 30%.Scanning electron microscope ( SEM) was applied to analyze the microstructure of microencapsulation, the microcapsule particles are spherical with smooth surface and no cracks which demonstrate its good embedding effect.The differential scanning calorimeter ( DSC) indicates that, maltodextrin and Arabic gum could contribute greatly on rising the glass transition temperature, from 59.6℃ to 86℃, improving the thermal stability of the microcapsule.