在这项研究中，碳纳米点（CD）-玉米淀粉（CS）纳米复合薄膜被制造用于活性食品包装应用。首先，银杏叶（GBL）被用作生物质衍生的碳前体，并采用简便的水热方法合成环境可持续的CD。然后对 GBL 衍生的碳纳米点 (gCD) 进行表征，并通过挤出工艺将其纳入 CS 基质中，以制造 CS/gCD 纳米复合薄膜。系统研究了不同gCD浓度对CS/gCD复合膜的理化和功能特性的影响。当暴露浓度高达 1000 μg/mL 时，gCD 对人结直肠腺癌细胞系 (Caco-2) 表现出非细胞毒性作用。将gCDs掺入CS薄膜中提高了其机械性能，与CS薄膜相比，CS/gCD2%纳米复合薄膜的韧性表现出198%的优越性。此外，阻氧性和防紫外线性能也显着提高。此外，由于 gCD 优异的抗氧化活性，CS/gCD 纳米复合膜显着延长了 ω-3 油的保质期，在 15 天的储存期内仅表现出 9 meq/kg。我们的结果表明，所开发的 CS/gCD 活性复合薄膜是环境可持续解决方案的有前途的候选者，可延长食品保质期并减少食品浪费。版权所有 © 2024 Elsevier Ltd。保留所有权利。

In this study, carbon nanodot (CD)-corn starch (CS) nanocomposite films are fabricated for active food packaging applications. First, ginkgo biloba leaves (GBL) were used as a biomass-derived carbon precursor, and a facile hydrothermal method was employed to synthesise environmentally sustainable CDs. The GBL-derived carbon nanodots (gCDs) were then characterised and incorporated into a CS matrix via an extrusion process to fabricate the CS/gCD nanocomposite film. The effects of various gCD concentrations on the physicochemical and functional properties of CS/gCD composite films were systematically investigated. The gCD exhibited non-cytotoxic effect against human colorectal adenocarcinoma cell line (Caco-2) cells when exposed up to 1000 μg/mL. The incorporation of gCDs into the CS film improved its mechanical properties, with the toughness of the CS/gCD2% nanocomposite film exhibiting 198 % superiority compared to the CS film. In addition, the oxygen barrier and UV-blocking properties were significantly improved. Furthermore, the CS/gCD nanocomposite film significantly extended the shelf life of ω-3 oils owing to the superior antioxidant activity of the gCDs, exhibiting only 9 meq/kg during the 15-day storage period. Our results suggest that the developed CS/gCD active composite film is a promising candidate for environmentally sustainable solutions to enhance food shelf life and reduce food waste.Copyright © 2024 Elsevier Ltd. All rights reserved.