Sun Xunwen, Li Qingye, Wu Hejun, Zhou Zehang, Feng Shiyi, Deng Pengcheng, Zou Huawei, Tian Dong, Lu Canhui
State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu 610065, China.
Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China.
Polymers (Basel). 2023 Apr 20;15(8):1959. doi: 10.3390/polym15081959.
Construction of sustainable composite biofilms from natural biopolymers are greatly promising for advanced packaging applications due to their biodegradable, biocompatible, and renewable properties. In this work, sustainable advanced food packaging films are developed by incorporating lignin nanoparticles (LNPs) as green nanofillers to starch films. This seamless combination of bio-nanofiller with biopolymer matrix is enabled by the uniform size of nanofillers and the strong interfacial hydrogen bonding. As a result, the as-prepared biocomposites exhibit enhanced mechanical properties, thermal stability, and antioxidant activity. Moreover, they also present outstanding ultraviolet (UV) irradiation shielding performance. As a proof of concept in the application of food packaging, we evaluate the effect of composite films on delaying oxidative deterioration of soybean oil. The results indicate our composite film could significantly decrease peroxide value (POV), saponification value (SV), and acid value (AV) to delay oxidation of soybean oil during storage. Overall, this work provides a simple and effective method for the preparation of starch-based films with enhanced antioxidant and barrier properties for advanced food packaging applications.
利用天然生物聚合物构建可持续复合生物膜，因其具有可生物降解、生物相容和可再生的特性，在先进包装应用方面极具前景。在这项工作中，通过将木质素纳米颗粒（LNPs）作为绿色纳米填料加入淀粉膜中，开发出了可持续的先进食品包装薄膜。纳米填料的均匀尺寸和强大的界面氢键作用，实现了生物纳米填料与生物聚合物基质的无缝结合。结果，所制备的生物复合材料表现出增强的机械性能、热稳定性和抗氧化活性。此外，它们还具有出色的紫外线（UV）辐射屏蔽性能。作为食品包装应用概念验证，我们评估了复合薄膜对延缓大豆油氧化变质的影响。结果表明，我们的复合薄膜能够显著降低过氧化值（POV）、皂化值（SV）和酸值（AV），从而延缓大豆油在储存期间的氧化。总体而言，这项工作为制备具有增强抗氧化和阻隔性能的淀粉基薄膜用于先进食品包装应用提供了一种简单有效的方法。
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