文献类型：期刊文献

英文题名：Synergistic silver-decorated zero-valent iron urushiol-polylactic acid nanocomposite films with dual antimicrobial and antioxidant functionality for prolonged fresh-cut apple preservation

作者：Li, Wenjun[1,2,3] Xue, Xingying[1,2,3] Tao, Ran[1,2,3] He, Qin[5] Chen, Hongxia[1,2,3] Zhou, Hao[1,2,3] Yang, Guliang[4] Qi, Zhiwen[1,2,3] Wang, Chengzhang[1,2,3]

第一作者：李文君;Li, Wenjun

机构：[1] National Key Laboratory for Development and Utilization of Forest Food Resources, Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, 210042, China; [2] Key Lab. of Biomass Energy and Material, Jiangsu Province, Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration, National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Nanjing, 210042, China; [3] International Innovation Center for Forest Chemicals and Materials, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing, 210042, China; [4] National Engineering Laboratory for Rice and By-products Processing, Food Science and Engineering College, Central South University of Forestry and Technology, Hunan, Changsha, 410004, China; [5] Key Lab of Microbiological Engineering of Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China

年份：2025

卷号：312

外文期刊名：International Journal of Biological Macromolecules

收录：EI(收录号：20252018425289);Scopus(收录号：2-s2.0-105004936300)

语种：英文

外文关键词：Crystallites - Free radical reactions - Listeria

摘要：In this study, urushiol (U1) and its antiseptics (U2, U3)-functionalized silver-coated nanoscale zero-valent iron composites (Ag@ZVI NPs1–3) were synthesized through metal coordination-driven assembly. The optimized NPs demonstrated significant antioxidant capacity, exhibiting IC50 values of 18.28 ± 0.75 μg/mL (DPPH) and 15.62 ± 0.22 μg/mL (ABTS), alongside broad-spectrum antibacterial activity with MIC values ranging from 3.27 to 7.26 μg/mL. Subsequent incorporation of 2 wt% NPs3 into polylactic acid (PLA) matrices yielded nanocomposite films (2%NPs3/PLA) with enhanced physicochemical properties, including improved thermal stability (melting enthalpy ΔHm = 31.6 J·g?1), superior mechanical strength (tensile strength 71.0 MPa, elongation at break 13.4 %), and controlled hydrophilicity (water vapor permeability 0.26 ± 0.14 g·mm·m?2·h?1·kPa?1, doubling PLA's baseline performance). The composite films exhibited dual functional efficacy, demonstrating sustained radical scavenging capacity (56.29 ± 1.26 % DPPH, 57.26 ± 2.28 % ABTS) and Fenton reaction-mediated bactericidal activity (99 % bacterial inactivation within 60 min via H?O?-catalyzed hydroxyl radical generation). The 2%NPs3/PLA nanocomposite showed remarkable biocompatibility (>97 % LO2 cell viability) and significantly improved the preservation of fresh-cut apples, outperforming commercial polyethylene films. This shelf-life extension is attributed to the synergistic antioxidant and antimicrobial effects, which likely contribute to the maintenance of key quality parameters. ? 2025 Elsevier B.V.