壳聚糖与变性淀粉复合凝聚法对藻油的微胶囊化：表征与氧化稳定性
Microencapsulation of algae oil by complex coacervation of chitosan and modified starch: Characterization and oxidative stability.
作者信息
Mu Hongyan, Song Zhaoxia, Wang Xin, Wang Deda, Zheng Xiaoqing, Li Xiaodan
机构信息
College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, Shandong, PR China.
College of Environmental and Biological Engineering, Henan University of Engineering, Zhengzhou 451191, Henan, PR China.
出版信息
Int J Biol Macromol. 2022 Jan 1;194:66-73. doi: 10.1016/j.ijbiomac.2021.11.168. Epub 2021 Dec 2.
The formation of complex coacervation using chitosan and octenyl succinic anhydride modified starch (OSA starch) and microencapsulation of algae oil were investigated in this study. The zeta-potential, turbidity and coacervate yield were evaluated as a function of pH and the chitosan- OSA starch mass ratio. The highest coacervate yield was achieved at pH 6.0 with a chitosan to OSA starch ratio of 1:3 (w/w). Isothermal titration calorimetry (ITC) indicated favorable affinity (Ka = 1.51 × 10 M) between chitosan and OSA starch. The microcapsules yielded an encapsulation efficiency (EE) in the range of 42.8 ± 0.8%- 93.1 ± 1.2%, the loading capacity ranged between 30.4 ± 2.7% and 58.3 ± 1.3%. Fourier transform infrared spectroscopy (FT-IR) spectra and scanning electron microscopy (SEM) further confirmed the microencapsulation. In comparison with the bulk oil, the microencapsulated algae oil exhibited improved oxidative stability during storage.
本研究考察了使用壳聚糖和辛烯基琥珀酸酐改性淀粉（OSA淀粉）形成复合凝聚以及对藻油进行微胶囊化的过程。研究了ζ电位、浊度和凝聚物产率随pH值和壳聚糖-OSA淀粉质量比的变化情况。在pH值为6.0、壳聚糖与OSA淀粉的比例为1:3（w/w）时，凝聚物产率最高。等温滴定量热法（ITC）表明壳聚糖与OSA淀粉之间具有良好的亲和力（Ka = 1.51×10 M）。微胶囊的包封率（EE）在42.8±0.8% - 93.1±1.2%范围内，载药量在30.4±2.7%至58.3±1.3%之间。傅里叶变换红外光谱（FT-IR）和扫描电子显微镜（SEM）进一步证实了微胶囊化。与散装油相比，微胶囊化藻油在储存期间表现出更好的氧化稳定性。
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