Preparation of Microcapsules of Myristica fragrans Houtt.Essential Oil by Spray Drying Method and Their Characterization
With Arabic gum and maltodextrin as the composite wall materials and Myristica fragrans Houtt.essential oil as the core material,microcapsules are prepared by spray drying method,and the morphology,release property and hygroscopicity are characterized.The results show that with the embedding rate as the index,the preparation process of microcapsules optimized by Box-Behnken Design response surface experiment is wall material concentration of 2.01%,core material-wall material ratio of 0.92 and inlet temperature of 185.56℃,at this time,the predicted embedding rate is 79.53%.The influence degree of the three factors is core material-wall material ratio>inlet temperature>wall material concentration.After embedding,the microcapsules appear as regular and full spherical shapes,and the particle size ranges from 5 μm to 9 μm.The microcapsules have good release property in water at room temperature and have certain hygroscopicity during storage.
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