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

通信作者：Qi, ZW[1];Qi, ZW[2];Qi, ZW[3]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Natl Key Lab Dev & Utilizat Forest Food Resources, Nanjing 210042, Peoples R China;[2]Natl Forestry & Grassland Adm, Natl Engn Res Ctr Low Carbon Proc & Utilizat Fores, Key Lab Biomass Energy & Mat, Key Lab Chem Engn Forest Prod, Nanjing 210042, Jiangsu, Peoples R China;[3]Nanjing Forestry Univ, Int Innovat Ctr Forest Chem & Mat, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Nanjing 210042, Peoples R China;[4]Cent South Univ Forestry & Technol, Food Sci & Engn Coll, Natl Engn Lab Rice & By Prod Deep Proc, Changsha 410004, Hunan, Peoples R China;[5]Nanjing Agr Univ, Coll Life Sci, Key Lab Microbiol Engn Agr Environm, Minist Agr, Nanjing 210095, Peoples R 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);WOS:【SCI-EXPANDED(收录号:WOS:001493919200023)】；

基金：Authors gratefully appreciate the financial supports from the Jiangsu Key Lab. of Biomass Energy and Material Foundation of China (JSBEM-S-202315) and National Natural Science Foundation of China (32101472, 32371824) for financial support.

语种：英文

外文关键词：Urushiol antiseptic; Polylactic acid; AgNPs and nZVI; Antioxidation and antibacterial; Functional preservation film

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 mu g/mL (DPPH) and 15.62 +/- 0.22 mu g/mL (ABTS), alongside broad-spectrum antibacterial activity with MIC values ranging from 3.27 to 7.26 mu g/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 Delta Hm = 31.6 Jg(-1)), superior mechanical strength (tensile strength 71.0 MPa, elongation at break 13.4 %), and controlled hydrophilicity (water vapor permeability 0.26 +/- 0.14 gmmm(-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 H2O2-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.