Sustainable agar-based film with zinc oxide/carbon quantum dot (ZnO/CQD) nanocomposite for photocatalytic antimicrobial and antioxidant packaging of chicken breast

IF 11 1区农林科学 Q1 CHEMISTRY, APPLIED

Food Hydrocolloids Pub Date : 2025-05-25 DOI:10.1016/j.foodhyd.2025.111568

Gyumi Na, Jun-Won Kang

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引用次数: 0

Abstract

The rising need for sustainable food packaging has spurred the creation of biopolymer-based films with improved functionality. However, many conventional biopolymer films exhibit poor mechanical strength and oxidative stability, limiting their practical use in real food packaging. In this research, functional biopolymer-based films were developed by incorporating ZnO and zinc oxide/carbon quantum dot (ZnO/CQD) nanocomposites into agar at 4 wt% and 8 wt%, respectively, using a green synthesis method involving chestnut shell. The Agar +8 %-ZnO/CQD (8 %) film (8ZCA8) enhanced the dispersion within the agar matrix, attributed to the presence of CQDs, facilitating a more homogeneous film structure and bolstering mechanical strength and barrier properties. In photocatalytic antimicrobial activity against Escherichia coli, Salmonella Typhimurium, and Listeria monocytogenes, the 8ZCA8 film achieved more than a 3-log CFU/g reduction on inoculated film surfaces and approximately a 2-log reduction on contaminated chicken breast under blue light irradiation. It also showed 13–20 % higher DPPH and ABTS radical scavenging activity than the ZnO-only film (ZA8). Moreover, the 8ZCA8 film exhibited lower cytotoxicity than the ZA8 film. When applied to the storage of chicken breast at 4 °C, the 8ZCA8 film demonstrated the highest photocatalytic antimicrobial activity and antioxidant performance, significantly outperforming the pristine agar film. These results highlight its potential as an effective active packaging material with antioxidant and antimicrobial functionalities, while also being environmentally friendly and sustainable.

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以氧化锌/碳量子点（ZnO/CQD）纳米复合材料制备的琼脂基膜用于鸡胸肉光催化抗菌和抗氧化包装

对可持续食品包装日益增长的需求刺激了基于生物聚合物的薄膜的创造，这些薄膜具有改进的功能。然而，许多传统的生物聚合物薄膜表现出较差的机械强度和氧化稳定性，限制了它们在真正食品包装中的实际应用。本研究采用栗子壳绿色合成方法，将氧化锌和氧化锌/碳量子点（ZnO/CQD）纳米复合材料分别以4 wt%和8 wt%的质量掺入琼脂中，制备了功能生物聚合物基薄膜。由于CQDs的存在，琼脂+ 8% -ZnO/CQD（8%）膜（8ZCA8）增强了琼脂基质内的分散，促进了膜结构更均匀，增强了机械强度和屏障性能。在蓝光照射下，8ZCA8膜对大肠杆菌、鼠伤寒沙门氏菌和单核增生李斯特菌的光催化抑菌活性在接种膜表面降低了3-log CFU/g以上，在污染鸡胸肉表面降低了约2-log。对DPPH和ABTS自由基的清除能力也比纯zno膜（ZA8）高13 - 20%。8ZCA8膜比ZA8膜具有更低的细胞毒性。在4°C条件下，8ZCA8膜的光催化抑菌活性和抗氧化性能最高，明显优于原始琼脂膜。这些结果突出了其作为具有抗氧化和抗菌功能的有效活性包装材料的潜力，同时也是环保和可持续的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Food Hydrocolloids 工程技术-食品科技

CiteScore

19.90

自引率

14.00%

发文量

871

审稿时长

37 days

期刊介绍： Food Hydrocolloids publishes original and innovative research focused on the characterization, functional properties, and applications of hydrocolloid materials used in food products. These hydrocolloids, defined as polysaccharides and proteins of commercial importance, are added to control aspects such as texture, stability, rheology, and sensory properties. The research's primary emphasis should be on the hydrocolloids themselves, with thorough descriptions of their source, nature, and physicochemical characteristics. Manuscripts are expected to clearly outline specific aims and objectives, include a fundamental discussion of research findings at the molecular level, and address the significance of the results. Studies on hydrocolloids in complex formulations should concentrate on their overall properties and mechanisms of action, while simple formulation development studies may not be considered for publication. The main areas of interest are: -Chemical and physicochemical characterisation Thermal properties including glass transitions and conformational changes- Rheological properties including viscosity, viscoelastic properties and gelation behaviour- The influence on organoleptic properties- Interfacial properties including stabilisation of dispersions, emulsions and foams- Film forming properties with application to edible films and active packaging- Encapsulation and controlled release of active compounds- The influence on health including their role as dietary fibre- Manipulation of hydrocolloid structure and functionality through chemical, biochemical and physical processes- New hydrocolloids and hydrocolloid sources of commercial potential. The Journal also publishes Review articles that provide an overview of the latest developments in topics of specific interest to researchers in this field of activity.