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| Preparation of fish oil microcapsules with chitosan sodium stearate as wall material by single coacervation method |
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| DOI： |
| KeyWord:fish oil microcapsules hydrophobic property chitosan sodium stearate single coacervation method embedding rate |
| FundProject:河北省重点研发计划自筹项目（18213202）；沧州师范学院科研创新团队资助（cxtdl1901） |
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| Abstract: |
| In order to explore the application of hydrophobic chitosan derivatives and enrich the choice of microcapsule wall materials, the fish oil microcapsules were prepared by single coacervation method with hydrophobic chitosan sodium stearate as wall material and the fish oil as core material. The preparation conditions of fish oil microcapsules were optimized by single factor experiment and orthogonal experiment, and the structure, morphology and thermal stability of fish oil microcapsules were characterized by the FT-IR, XRD, SEM and thermal gravimetric analyzer. The results showed that the optimal preparation conditions for fish oil microcapsules were obtained as follows: mass ratio of wall material to core material 1∶ 1, mass concentration of emulsifier Tween-20 14.40 g/L (when the core material mass was 1 g, the dosage of emulsifier solution was 200 mL), and ultrasonic power 720 W. Under these conditions, the fish oil embedding rate was (50.00±0.47)%. The fish oil microcapsules had uniform particle size distribution and good thermal stability. After 18 months of storage, there was almost no change in thermal stability. The hydrophobic chitosan sodium stearate wall material was easy to prepare, and after being formed into a capsule by single coacervation method, it could effectively maintain the thermal stability of the microcapsule. |
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