Zhao Jiale, Huan Hengfu, Yang Tao, Chen Jian, Yao Guanglong
College of Food Science and Engineering, Hainan University, Haikou 570228, China.
Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences (CATAS) / Key Laboratory of Crop Gene Resources and Germplasm Enhancement in Southern China, Ministry of Agriculture and Rural Affairs, Hainan, Haikou 571101, China.
Food Chem. 2025 Apr 1;470:142753. doi: 10.1016/j.foodchem.2025.142753. Epub 2025 Jan 3.
Hydrogen peroxide (HO) was used to modify a natural polymer, sesbania gum (SG), to prepare oxidized sesbania gum (OSG) with the aim of investigating the physicochemical properties, antimicrobial activity of polyethylene oxide (PEO), OSG, and ε-poly(lysine) (ε-PL) composite fibre membranes and their applications in fresh-cut mango preservation. The PEO/OSG/ε-PL composite fibre membranes were successfully prepared via solution blow spinning (SBS) technology. The results of a series of characterizations revealed that ε-PL was successfully loaded into the fibrous membranes, exhibited good biocompatibility, and ε-PL was better encapsulated, with the membranes. The hydrophilicity, thermal stability, mechanical properties, and flexibility of the fibrous membranes were improved, and the water vapour transmission rate was reduced with the ε-PL content. In vitro bacterial inhibition experiments revealed that PEO/OSG/ε-PL fibre membranes with more than 2 wt% added ε-PL effectively inhibited the growth of E. coli and S. aureus. Fruit preservation experiments showed that PEO/OSG/ε-PL fibre membrane could reduce weight loss, inhibit microbial growth, and delay quality deterioration of fresh-cut mango. In addition, the PEO/OSG/ε-PL fibre membrane showed high biodegradability. These results show that the PEO/OSG/ε-PL composite fibre membrane prepared by SBS has application potential as an active packaging material.
过氧化氢（HO）用于改性天然聚合物田菁胶（SG），制备氧化田菁胶（OSG），旨在研究聚环氧乙烷（PEO）、OSG和ε-聚赖氨酸（ε-PL）复合纤维膜的理化性质、抗菌活性及其在鲜切芒果保鲜中的应用。通过溶液吹纺（SBS）技术成功制备了PEO/OSG/ε-PL复合纤维膜。一系列表征结果表明，ε-PL成功负载到纤维膜中，表现出良好的生物相容性，并且ε-PL被更好地包裹在膜中。纤维膜的亲水性、热稳定性、机械性能和柔韧性得到改善，随着ε-PL含量的增加，水蒸气透过率降低。体外抑菌实验表明，添加ε-PL超过2 wt%的PEO/OSG/ε-PL纤维膜能有效抑制大肠杆菌和金黄色葡萄球菌的生长。果实保鲜实验表明，PEO/OSG/ε-PL纤维膜可以减少鲜切芒果的失重，抑制微生物生长，延缓品质劣变。此外，PEO/OSG/ε-PL纤维膜具有高生物降解性。这些结果表明，通过SBS制备的PEO/OSG/ε-PL复合纤维膜作为活性包装材料具有应用潜力。
