Abstract
β-Carotene is one of the most abundant natural pigments in foods; however, usage of β-carotene is limited because of its instability. Microencapsulation techniques are usually applied to protect microencapsulated β-carotene from oxidization. In this study, β-carotene was microencapsulated using different drying processes: spray-drying, spray freeze-drying, coating, and spray granulation. The properties of morphology, particle size, water content, thermal characteristic, and chemical stability have been explored and compared. Scanning electron microscopy measure¬ments showed that the coated powder had a dense surface surrounded by starch and suggested that the coating process gave a microencapsulated powder with the smallest bulk density and the best compressibility among the prepared powders. The chemical stabilities of microcapsules were evaluated during six months of storage at different temperatures. The coated powder had the highest mass fraction of β-carotene, which indicated that the coating pro¬cess was superior to the three other drying processes.
概要
目 的
系统地比较不同的干燥方式对β-胡萝卜素微胶囊粉体性质 (形态、 颗粒度、 水分含量、 热特性和化学稳定性) 的影响。
创新点
全面且系统地展现了喷雾干燥、 喷雾冷冻干燥、 包衣和喷雾造粒等四种干燥方式对β-胡萝卜素微胶囊粉体的作用。
方 法
β-胡萝卜素乳液通过四种不同的干燥方式得到四种β-胡萝卜素微胶囊粉体, 通过理化指标、 电子扫描显微镜拍照、 差示扫描量热法(DSC)和加速稳定性实验等手段比较这四种样品的各项性质的差异。
结 论
通过包衣法制备的β-胡萝卜素微囊与其它方法制得的β-胡萝卜素微囊相比, 具有优异的稳定性和均匀的颗粒结构。 此外, DSC 结果表明, 微胶囊化可以提高β-胡萝卜素微胶囊的玻璃化转变温度 (Tg) 和熔化温度 (Tm) 值。
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Acknowledgments
We thank Gabrielle DAVID, PhD, from Liwen Bianji, Edanz Group China (http://www.liwenbianji.cn/ac), for edit¬ing the English text of this manuscript.
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Xiang-yu LI and Min XIAO performed the experimental research and data analysis, wrote and edited the manuscript. Mian-bin WU and Zhi-ming WANG performed the data analysis and wrote the paper. Shu-huan LU collected and analyzed the data. Jian-ming YAO and Li-rong YANG contributed to the study design, data analysis, writing and editing of the manuscript. All authors have read and approved the final manuscript and, therefore, had full access to all the data in the study and take responsibility for the integrity and security of the data.
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Xiang-yu LI, Mian-bin WU, Min XIAO, Shu-huan LU, Zhi-ming WANG, Jian-ming YAO, and Li-rong YANG de¬clare that they have no conflict of interest.
No studies using human or animal subjects were per¬formed by any of the authors.
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Project supported by the Hubei Province Technology Innovation Project (No. 2017ACA083), China
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Li, Xy., Wu, Mb., Xiao, M. et al. Microencapsulated β-carotene preparation using different drying treatments. J. Zhejiang Univ. Sci. B 20, 901–909 (2019). https://doi.org/10.1631/jzus.B1900157
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DOI: https://doi.org/10.1631/jzus.B1900157