Preparation of volatile oil microcapsules of Pinus massoniana needles
The aim of this experiment was to identify the optimal process for preparing microcapsules of Pinus massoniana needles volatile oil.Using gum arabic and gelatin as wall materials,the microcapsules were prepared using the coacervation method.Single-factor experiments were conducted to investigate the effects of the ratio of gum arabic to gelatin,the core-to-wall ratio,the coacervation temperature,and the coacervation reaction time on the formation of the microcapsules.The encapsulation efficiency,drug loading,and yield were used as the criteria for evaluating the microcapsules,and the optimal conditions for Pinus massoniana needles volatile oil microcapsules were selected through orthogonal experiments.The results showed that when the ratio of gelatin to gum arabic was 1.0∶1.0,the core-to-wall ratio was 1.0∶2.0,and the coacervation temperature was 35 ℃,the encapsulation efficiency and comprehensive score of the Pinus massoniana needles volatile oil microcapsules were the highest,at 82.98％and 68.92,respectively.The microcapsules had a smooth surface,regular shape,non-adhesive properties,and uniform particle size.The study indicates that the coacervation method used in the experiment is efficient for preparing microencapsulation and can provide a reference for the application of volatile oils in the field of feed additives.
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