Li Yangjing, Tian Wei, Chen Tao, Li Yanfei, Zhao Runan, Li Yuxin, Chi Xuesong, Wu Di, Du Yinan, Hu Jiangning
SKL of Marine Food Processing & Safety Control, National Engineering Research Center of Seafood, Collaborative Innovation Center of Seafood Deep Processing, School of Food Science and Technology, Dalian Polytechnic University, Dalian 116034, China.
Institute of Cash Crops, Hebei Academy of Agricultural and Forestry Sciences, Shijiazhuang 050051, China.
Food Chem. 2025 Jul 1;479:143844. doi: 10.1016/j.foodchem.2025.143844. Epub 2025 Mar 10.
Mitigating food spoilage from microbial infections remains a critical challenge in food preservation. Although Zn ions are used as chemical bactericides, their use alone often requires high doses. A novel nanomaterial, Zn@MNPs, combining photothermal properties with the controlled release of Zn, was synthesized through a coordination of Zn with melanin nanoparticles (MNPs) derived from cuttlefish ink. Zn@MNPs were capable of attaching onto the bacterial surfaces, enabling high-efficiency release of Zn under mildly acidic conditions typically associated with bacterial infections. This leads to sustained antibacterial activity, causing bacterial membrane rupture and leakage of intracellular components. Incorporating Zn@MNPs into polyvinyl alcohol (PVA)-based films improved their ability to block UV light and reduce oxygen and water vapor permeability. These films effectively reduced dehydration, preserved nutritional content, and extended fruit shelf life. This study highlights the potential of Zn@MNPs-based PVA films as biodegradable, bioactive packaging materials for enhancing food preservation and safety.
减轻微生物感染导致的食物腐败仍然是食品保鲜中的一项关键挑战。尽管锌离子被用作化学杀菌剂，但单独使用时通常需要高剂量。一种新型纳米材料Zn@MNPs，通过将锌与源自乌贼墨的黑色素纳米颗粒（MNPs）配位合成，它兼具光热特性和锌的可控释放功能。Zn@MNPs能够附着在细菌表面，在通常与细菌感染相关的微酸性条件下实现锌的高效释放。这导致持续的抗菌活性，引起细菌膜破裂和细胞内成分泄漏。将Zn@MNPs掺入基于聚乙烯醇（PVA）的薄膜中提高了其阻挡紫外线以及降低氧气和水蒸气渗透性的能力。这些薄膜有效减少了脱水，保留了营养成分，并延长了水果的保质期。这项研究突出了基于Zn@MNPs的PVA薄膜作为可生物降解、具有生物活性的包装材料在增强食品保鲜和安全性方面的潜力。
