Key Laboratory of Bio-Based Material Science & Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China.
Int J Mol Sci. 2023 Jan 13;24(2):1577. doi: 10.3390/ijms24021577.
Active packaging materials protect food from deterioration and extend its shelf life. In the quest to design intriguing packaging materials, biocomposite ZnO/plant polyphenols/cellulose/polyvinyl alcohol (ZnPCP) was prepared via simple hydrothermal and casting methods. The structure and morphology of the composite were fully analyzed using XRD, FTIR, SEM and XPS. The ZnO particles, plant polyphenols (PPL) and cellulose were found to be dispersed in PVA. All of these components share their unique functions with the composite's properties. This study shows that PPL in the composite not only improves the ZnO dispersivity in PVA as a crosslinker, but also enhances the water barrier of PVA. The ZnO, PPL and cellulose work together, enabling the biocomposite to perform as a good food packaging material with only a 1% dosage of the three components in PVA. The light shielding investigation showed that ZnPCP-10 can block almost 100% of both UV and visible light. The antibacterial activities were evaluated by Gram-negative () and Gram-positive (), with 4.4 and 6.3 mm inhibition zones, respectively, being achieved by ZnPCP-10. The enhanced performance and easy degradation enables the biocomposite ZnPCP to be a prospect material in the packaging industry.
活性包装材料可防止食物变质并延长其保质期。在设计有趣的包装材料时，通过简单的水热和浇铸方法制备了生物复合 ZnO/植物多酚/纤维素/聚乙烯醇（ZnPCP）。使用 XRD、FTIR、SEM 和 XPS 对复合材料的结构和形态进行了全面分析。发现 ZnO 颗粒、植物多酚（PPL）和纤维素分散在 PVA 中。所有这些成分都通过复合材料的特性发挥其独特的功能。这项研究表明，复合材料中的 PPL 不仅作为交联剂提高了 PVA 中 ZnO 的分散性，而且提高了 PVA 的水阻隔性。ZnO、PPL 和纤维素协同作用，使生物复合材料能够在 PVA 中仅添加三种成分的 1%用量时，用作良好的食品包装材料。遮光性研究表明，ZnPCP-10 可以阻挡近 100%的紫外线和可见光。通过革兰氏阴性菌（ ）和革兰氏阳性菌（ ）评估了抗菌活性，ZnPCP-10 分别达到了 4.4 和 6.3mm 的抑菌环。增强的性能和易于降解使生物复合材料 ZnPCP 成为包装行业的有前景的材料。
