Zhang Xinxin, Li Gang, Chen Chen, Fan Hongxian, Fang Jing, Wu Xingjiang, Qi Junjie, Li Hao
National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China.
National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China.
Int J Biol Macromol. 2025 May;306(Pt 2):141658. doi: 10.1016/j.ijbiomac.2025.141658. Epub 2025 Mar 1.
This study aims to develop a chitosan/polyvinyl alcohol (CS/PVA) composite film (QZCS/PVA) for food packaging, enhanced by the incorporation of quaternary ammonium lignin/ZnO nanoparticles (QAL/ZnO) to improve its antibacterial, antioxidant, and mechanical properties. The QAL/ZnO nanoparticles were synthesized using a co-precipitation method, resulting in a synergistic effect that enhances the uniformity and stability of the composite film. The double cross-linked CS/PVA composite film containing QAL/ZnO nanoparticles effectively mitigates the brittleness of pure chitosan films, achieving a tensile strength of 95.89 MPa. Crucially, the inclusion of QAL/ZnO imparts exceptional antioxidant and antibacterial properties to the QZCS/PVA composite film. Disk diffusion assays revealed markedly enhanced antibacterial efficacy against Staphylococcus aureus and Escherichia coli in comparison to analogous biopolymer films. The dense network structure of the composite film also provides excellent water resistance, which contributes to extending the shelf life of food products. In a 12-day grape preservation experiment, the composite film exhibited outstanding preservation performance. These results underscore the potential of the CS/PVA composite film containing lignin and chitosan for food packaging applications, offering significant advantages in improving food preservation.
本研究旨在开发一种用于食品包装的壳聚糖/聚乙烯醇（CS/PVA）复合膜（QZCS/PVA），通过掺入季铵化木质素/氧化锌纳米颗粒（QAL/ZnO）来增强其抗菌、抗氧化和机械性能。采用共沉淀法合成了QAL/ZnO纳米颗粒，产生了协同效应，提高了复合膜的均匀性和稳定性。含有QAL/ZnO纳米颗粒的双交联CS/PVA复合膜有效减轻了纯壳聚糖膜的脆性，拉伸强度达到95.89MPa。至关重要的是，QAL/ZnO的加入赋予了QZCS/PVA复合膜优异的抗氧化和抗菌性能。纸片扩散法显示，与类似的生物聚合物膜相比，对金黄色葡萄球菌和大肠杆菌的抗菌效果显著增强。复合膜的致密网络结构还具有出色的耐水性，有助于延长食品的保质期。在为期12天的葡萄保鲜实验中，复合膜表现出优异的保鲜性能。这些结果强调了含木质素和壳聚糖的CS/PVA复合膜在食品包装应用中的潜力，在改善食品保鲜方面具有显著优势。
