Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy.
Department of Chemical, Biological, Pharmaceutical and Environmental Science, University of Messina, 98166 Messina, Italy.
Int J Mol Sci. 2023 Jul 19;24(14):11628. doi: 10.3390/ijms241411628.
The formulation of eco-friendly biodegradable packaging has received great attention during the last decades as an alternative to traditional widespread petroleum-based food packaging. With this aim, we designed and tested the properties of polyhydroxyalkanoates (PHA)-based bioplastics functionalized with phloretin as far as antioxidant, antimicrobial, and morpho-mechanic features are concerned. Mechanical and hydrophilicity features investigations revealed a mild influence of phloretin on the novel materials as a function of the concentration utilized (5, 7.5, 10, and 20 mg) with variation in FTIR e RAMAN spectra as well as in mechanical properties. Functionalization of PHA-based polymers resulted in the acquisition of the antioxidant activity (in a dose-dependent manner) tested by DPPH, TEAC, FRAR, and chelating assays, and in a decrease in the growth of food-borne pathogens ( ATCC 13932). Finally, apple samples were packed in the functionalized PHA films for 24, 48, and 72 h, observing remarkable effects on the stabilization of apple samples. The results open the possibility to utilize phloretin as a functionalizing agent for bioplastic formulation, especially in relation to food packaging.
在过去几十年中，作为传统广泛使用的石油基食品包装的替代品，环保可生物降解包装的配方受到了极大的关注。为此，我们设计并测试了具有抗氧化、抗菌和形态力学性能的黄酮醇功能化聚羟基烷酸酯（PHA）基生物塑料的性能。机械和亲水性特性研究表明，黄酮醇对新型材料的影响很小，这取决于所使用的浓度（5、7.5、10 和 20mg），其变化在 FTIR 和 Raman 光谱以及机械性能中都有体现。PHA 基聚合物的功能化导致获得了抗氧化活性（通过 DPPH、TEAC、FRAR 和螯合测定进行了剂量依赖性测试），并降低了食源性病原体的生长（ATCC 13932）。最后，将功能性 PHA 薄膜用于苹果样品包装 24、48 和 72 小时，观察到对苹果样品稳定化的显著效果。这些结果为黄酮醇作为生物塑料配方的功能化剂的应用提供了可能性，特别是在食品包装方面。
