Li Chen, Li Fayong, Wang Ke, Zhao Yang, Xie Dong
Institute of Biological and Medical Engineering, Guangdong Academy of Sciences, Guangzhou 510316, China; Guangdong Biomaterials Engineering Technology Research Center, Guangzhou 510316, China.
Institute of Biological and Medical Engineering, Guangdong Academy of Sciences, Guangzhou 510316, China; Guangdong Biomaterials Engineering Technology Research Center, Guangzhou 510316, China.
Int J Biol Macromol. 2024 Dec;283(Pt 3):137888. doi: 10.1016/j.ijbiomac.2024.137888. Epub 2024 Nov 19.
Developing a high-barrier, green, and sustainable functional packaging film material to address food safety is urgently needed but remains a significant challenge. Natural biopolymers possess the potential to serve as contemporary eco-friendly food packaging materials due to their exceptional biocompatibility and biodegradability. Herein, we present a novel class of renewable and degradable films fashioned from Egg white protein (EWP) and chitosan (CS) biopolymers. And we detected their structural, physical, and functional properties to ensure a nanocomposite film with the optimal performances. Scanning electron microscopy (SEM) images demonstrated a consistent enhancement in the crinkle level of the composite film as the mass ratio of CS increased. Furthermore, the tensile strength (TS) and elongation at break (EAB) of these films were enhanced to 402.6 % and 107.9 %, respectively. Nevertheless, the oxygen permeability (OP) and water vapor permeability (WVP) were notably reduced to 68.1 % and 93.3 %, respectively. Compared to EWP/CS/Cur, the antibacterial rate of prepared EWP/CS/Cur(Xie et al., 2024 [3]) films were enhanced to 105.4 % and 183.9 % for E. coli and S. aureus, respectively. During banana and green grape preservation, these functional films significantly retarded the decline in weight and firmness. Therefore, EWP/CS films augmented with bioactive materials could potentially serve as preservation packaging, exhibiting notable ecological advantages and recyclability potential, thus demonstrating considerable potential as a substitution for conventional plastic storage packages.
开发一种高阻隔、绿色且可持续的功能性包装薄膜材料以解决食品安全问题迫在眉睫，但仍是一项重大挑战。天然生物聚合物因其卓越的生物相容性和生物降解性，具有成为当代环保食品包装材料的潜力。在此，我们展示了一类由蛋清蛋白（EWP）和壳聚糖（CS）生物聚合物制成的新型可再生且可降解薄膜。并且我们检测了它们的结构、物理和功能特性，以确保获得具有最佳性能的纳米复合薄膜。扫描电子显微镜（SEM）图像表明，随着CS质量比的增加，复合薄膜的皱纹程度持续增强。此外，这些薄膜的拉伸强度（TS）和断裂伸长率（EAB）分别提高到了402.6%和107.9%。然而，氧气透过率（OP）和水蒸气透过率（WVP）分别显著降低到了68.1%和93.3%。与EWP/CS/Cur相比，制备的EWP/CS/Cur（Xie等人，2024 [3]）薄膜对大肠杆菌和金黄色葡萄球菌的抗菌率分别提高到了105.4%和183.9%。在香蕉和青葡萄保鲜过程中，这些功能性薄膜显著延缓了重量和硬度的下降。因此，添加了生物活性材料的EWP/CS薄膜有潜力用作保鲜包装，展现出显著的生态优势和可回收潜力，从而显示出作为传统塑料储存包装替代品的巨大潜力。
