Giotopoulou Iro, Fotiadou Renia, Stamatis Haralambos, Barkoula Nektaria-Marianthi
Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece.
Department of Biological Applications and Technology, University of Ioannina, 45110 Ioannina, Greece.
Polymers (Basel). 2023 Nov 30;15(23):4580. doi: 10.3390/polym15234580.
The current study proposes an efficient coating methodology for the development of low-density polyethylene (LDPE) films with prolonged bioactivity for food packaging applications. Three natural phenolic-based substances were incorporated at optimized concentrations in methyl-cellulose-based solutions and used as coatings on LDPE films. The amount of surfactant/emulsifier was optimized to control the entrapment of the bioactive substances, minimizing the loss of the substances during processing, and offering prolonged bioactivity. As a result, the growth of was substantially inhibited after interaction with the coated films, while coated films presented excellent antioxidant activities and maintained their mechanical performance after coating. Considerable bioactivity was observed after up to 7 days of storage in sealed bags in the case of carvacrol- and thymol-coated films. Interestingly, films coated with olive-leaf extract maintained a high level of antimicrobial and antioxidant properties, at least for 40 days of storage.
当前的研究提出了一种高效的涂层方法，用于开发具有延长生物活性的低密度聚乙烯（LDPE）薄膜，以用于食品包装应用。三种基于天然酚类的物质以优化的浓度掺入甲基纤维素基溶液中，并用作LDPE薄膜的涂层。对表面活性剂/乳化剂的用量进行了优化，以控制生物活性物质的包封，最大限度地减少加工过程中物质的损失，并提供延长的生物活性。结果，与涂层薄膜相互作用后，[此处原文缺失具体微生物名称]的生长受到显著抑制，而涂层薄膜表现出优异的抗氧化活性，并且在涂层后保持其机械性能。在香芹酚和百里香酚涂层薄膜的情况下，在密封袋中储存长达7天后观察到相当大的生物活性。有趣的是，用橄榄叶提取物涂层的薄膜至少在储存40天内保持了高水平的抗菌和抗氧化性能。
