Biosafe Cu-MOF loaded chitosan/gelatin-based multifunctional packaging film for monitoring shrimp freshness

IF 11 1区农林科学 Q1 CHEMISTRY, APPLIED

Food Hydrocolloids Pub Date : 2024-10-09 DOI:10.1016/j.foodhyd.2024.110721

Peini Li , Yiqing Deng , Wangcai Zou , Zhenqiao Ma , Xiandi Yang , Qiang Zhao

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Abstract

As living standards improve, the demand for food freshness has gradually increased. Multifunctional packaging materials that monitor food freshness in real-time, delay spoilage, and are environmentally friendly have emerged as ideal solutions. This study synthesized an ammonia-sensitive copper-based metal-organic framework (Cu-MOF) and incorporated it into a matrix composed of chitosan (CS) and gelatin (Gel). The resulting film exhibits ammonia-sensitive color-changing properties, antibacterial activity, and excellent biodegradability. The effects of Cu-MOF incorporation on the structural, physical, and functional properties of the CS/Gel films were systematically evaluated. Results demonstrated that the Cu-MOF was uniformly distributed within the CS/Gel matrix, significantly enhancing the mechanical properties (tensile strength increased by 68.49%), oxygen/water vapor barrier properties, and UV-blocking capability of the films. Notably, the CS/Gel@Cu-MOF films exhibited excellent antibacterial performance, with sterilization rates of 94.2% against Escherichia coli and 99.6% against Staphylococcus aureus. Additionally, the films showed good biocompatibility, biodegradability, and a sensitive color response to ammonia. The films were successfully used to monitor shrimp freshness through color change, transitioning from light green to brown as spoilage occurred. These findings indicate that CS/Gel@Cu-MOF films have significant potential for real-time visual freshness monitoring in food packaging, contributing to reduced food safety risks and waste.

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基于壳聚糖/明胶的 Biosafe Cu-MOF 负载多功能包装膜，用于监测虾的新鲜度

随着生活水平的提高，人们对食品新鲜度的要求也逐渐提高。实时监测食品新鲜度、延缓腐败变质、环保的多功能包装材料已成为理想的解决方案。本研究合成了对氨敏感的铜基金属有机框架（Cu-MOF），并将其加入到由壳聚糖（CS）和明胶（Gel）组成的基质中。所得薄膜具有氨敏感变色特性、抗菌活性和良好的生物降解性。我们系统地评估了 Cu-MOF 的加入对 CS/Gel 薄膜的结构、物理和功能特性的影响。结果表明，Cu-MOF 均匀地分布在 CS/Gel 基质中，显著提高了薄膜的机械性能（拉伸强度提高了 68.49%）、氧气/水蒸气阻隔性能和紫外线阻隔能力。值得注意的是，CS/Gel@Cu-MOF 薄膜具有优异的抗菌性能，对大肠杆菌的杀菌率为 94.2%，对金黄色葡萄球菌的杀菌率为 99.6%。此外，这些薄膜还表现出良好的生物相容性、生物可降解性以及对氨的敏感颜色反应。这些薄膜被成功地用于通过颜色变化监测虾的新鲜度，当发生腐败时，颜色会从浅绿色过渡到棕色。这些研究结果表明，CS/Gel@Cu-MOF 薄膜在食品包装的实时视觉新鲜度监测方面具有巨大潜力，有助于降低食品安全风险和减少浪费。

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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.