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| Optimization of preparation process of linseed oil diglyceride emulsion and physicochemical properties of its microcapsules |
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| DOI： |
| KeyWord:linseed oil diglyceride emulsion microcapsule physicochemical property simulated digestion in vitro |
| FundProject:国家杰出青年科学基金（31725022）；国家自然科学基金（31930084）；广东省科技计划项目(2019A050503002)；中国农业研究系统(CARS-18-ZJ0503)；佛山市科技创新项目(FS0AA-KJ919-4402-0013) |
| Author Name | Affiliation | | YUE Haipeng1, WANG Weifei2, YANG Bo3, WAN Chufeng1, WANG Yonghua1 | 1.School of Food Science and Engineering, South China University of Technology, Guangzhou 510000,
China
2.Institute of Sericulture and Agricultural Products, Guangdong Academy of Agricultural
Sciences, Guangzhou 510000, China
3.School of Biology and Biological Engineering,
South China University of Technology, Guangzhou 510000, China |
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| Abstract: |
| To improve the stability and utilization of linseed oil diglyceride, using resistant dextrin and sodium caseinate as composite wall materials, glycerol monostearate (MG) and citric acid fatty acid glyceride (CITREM) as composite emulsifiers, linseed oil diglyceride emulsion was prepared, and linseed oil diglyceride microcapsules were prepared by spray drying method.The effects of solid content, mass ratio of MG to CITREM, emulsifier dosage(based on core material mass) and oil load on the particle size and stability of linseed oil diglyceride emulsion were investigated by single factor experiment. Box-Behnken design response surface was used to optimize the preparation process of linseed oil diglyceride emulsion, the properties of linseed oil diglyceride microcapsules were analyzed by scanning electron microscope with tungsten filament lamp, Fourier transform infrared spectrometer, thermogravimetric analyzer and simulated digestion model in vitro.The results showed that the optimal preparation conditions of linseed oil diglyceride emulsion were obtained as follows:solid content 50%, mass ratio of MG to CITREM 5∶ 4, emulsifier dosage 2.5% and oil load 50%. Under these conditions, the particle size of linseed oil diglyceride emulsion was 267.40 nm, and the encapsulation rate of linseed oil diglyceride microcapsules was 97.85%. The linseed oil diglyceride microcapsules had complete structure, spherical shape, no obvious external damage, good thermal stability and solubility. The core material release rate of microcapsules in simulated gastrointestinal digestion in vitro reached 84.59%. In conclusion, microencapsulation is beneficial to improve the stability of linseed oil diglyceride and expand its application range. |
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