College of Food Science and Engineering, Bohai University, National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, Key Laboratory of Food Safety of Liaoning Province, Jinzhou 121013, China; Shanghai Syntheall Pharmaceutical Co., Ltd., 201200, China.
University Institute of Biotechnology, Chandigarh University Mohali, Punjab 140413, India.
Int J Biol Macromol. 2023 May 15;237:123932. doi: 10.1016/j.ijbiomac.2023.123932. Epub 2023 Mar 7.
In this study, the coaxial nanofiber films were prepared by coaxial electrospinning technique with cinnamaldehyde (CMA) and tea polyphenol (TP) as core material and polylactic acid (PLA) as shell material, and to obtain food packaging materials with great physicochemical and antibacterial properties, zinc oxide (ZnO) sol were added into PLA, and ZnO/CMA/TP-PLA coaxial nanofiber films were prepared. Meanwhile, the microstructure and physicochemical properties were determined, and the antibacterial properties and mechanism were investigated with Shewanella putrefaciens (S. putrefaciens) as target. The results show that the ZnO sol makes the physicochemical properties and antibacterial properties of the coaxial nanofiber films improve. Among them, the 1.0 % ZnO/CMA/TP-PLA coaxial nanofibers have smooth and continuous uniform surfaces, and their encapsulation effect on CMA/TP and antibacterial properties are the optimal. The synergistic action of CMA/TP and ZnO sol cause severe depression and folding of the cell membrane of S. putrefaciens, makes cell membrane permeability increase and of intracellular materials spillage, interference the bacteriophage protein expression, and makes macromolecular protein degraded. In this study, the introduction of oxide sols into polymeric shell materials by in-situ synthesis technique can provide theoretical support and methodological guidance for the application of electrospinning technology in the field of food packaging.
在这项研究中，采用同轴静电纺丝技术，以肉桂醛（CMA）和茶多酚（TP）为芯材，聚乳酸（PLA）为壳材，制备了同轴纳米纤维膜，以获得具有优异物理化学和抗菌性能的食品包装材料。将氧化锌（ZnO）溶胶加入到 PLA 中，制备了 ZnO/CMA/TP-PLA 同轴纳米纤维膜。同时，对其微观结构和物理化学性能进行了测定，并以腐败希瓦氏菌（S. putrefaciens）为目标，研究了其抗菌性能和机制。结果表明，ZnO 溶胶改善了同轴纳米纤维膜的物理化学性能和抗菌性能。其中，1.0%ZnO/CMA/TP-PLA 同轴纳米纤维具有光滑连续的均匀表面，对 CMA/TP 的包埋效果和抗菌性能最佳。CMA/TP 和 ZnO 溶胶的协同作用导致腐败希瓦氏菌细胞膜严重凹陷和折叠，使细胞膜通透性增加，细胞内物质溢出，干扰噬菌体蛋白表达，使大分子蛋白降解。本研究通过原位合成技术将氧化物溶胶引入聚合物壳材料中，为静电纺丝技术在食品包装领域的应用提供了理论支持和方法指导。
