Key Laboratory of Hainan Province for Postharvest Physiology and Technology of Tropical Horticultural Products, South Subtropical Crops Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524091, PR China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China.
Key Laboratory of Hainan Province for Postharvest Physiology and Technology of Tropical Horticultural Products, South Subtropical Crops Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524091, PR China.
Int J Biol Macromol. 2024 Feb;258(Pt 1):128933. doi: 10.1016/j.ijbiomac.2023.128933. Epub 2023 Dec 22.
In this study, zein-gallic acid covalent complex prepared by alkali treatment was utilized as an emulsifier to stabilize cinnamon essential oil (CEO) Pickering emulsion, and the chitosan-based (CZGE) films loaded with CEO Pickering emulsion were prepared by blending. The influences of different contents of CEO Pickering emulsion on the physical properties and biological activities of CZGE films were investigated. The results showed that Pickering emulsion had good compatibility with chitosan matrix and enhanced the interaction between film-forming matrix polymer. In addition, incorporating with CEO Pickering emulsion (15 %, v/v) significantly improved the mechanical and barrier properties of the films, and also enhanced the light transmittance and thermal stability of the films. Furthermore, the loading of emulsion also improved the antioxidant activities of the films and led to the formation of high antimicrobial property against food pathogens, and the slow-release behavior of CEO could effectively extend the biological activity of the films. These results suggested that Pickering emulsion has potential as a loading system and a plasticizer in active packaging, and the feasibility of CZGE film in food packaging.
在这项研究中，利用碱处理制备的玉米醇溶蛋白-没食子酸共价复合物作为乳化剂来稳定肉桂精油（CEO）Pickering 乳液，然后通过共混制备负载有 CEO Pickering 乳液的壳聚糖基（CZGE）薄膜。研究了不同含量的 CEO Pickering 乳液对 CZGE 薄膜物理性能和生物活性的影响。结果表明，Pickering 乳液与壳聚糖基质具有良好的相容性，并增强了成膜基质聚合物之间的相互作用。此外，添加 CEO Pickering 乳液（15%，v/v）显著提高了薄膜的力学性能和阻隔性能，同时提高了薄膜的透光率和热稳定性。此外，乳液的负载还提高了薄膜的抗氧化活性，导致对食品病原体具有高抗菌性能，并使 CEO 呈现出缓慢释放行为，有效延长了薄膜的生物活性。这些结果表明，Pickering 乳液作为负载系统和活性包装中的增塑剂具有潜力，CZGE 薄膜在食品包装中具有可行性。
