Development and application of intelligent packaging films based on carboxymethyl starch/PVA with Cu-LTE nanocrystal as functional compatibilizer

IF 8.5 1区农林科学 Q1 FOOD SCIENCE & TECHNOLOGY Food Packaging and Shelf Life Pub Date : 2024-06-01 DOI:10.1016/j.fpsl.2024.101306

Nannan Li , Hai Qin , Qun Tang , Daijiang Peng , Xiaoyan Luo , Heping Li , Zhiming Zou

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Abstract

In the realm of food safety, innovative intelligent packaging material that can provide the capacity for timely and effectively monitoring the food freshness are essential. In this work, ammonia-sensitive Cu-based metal organic framework (Cu-LTE) nanocrystal was manufactured and characterized, and then explored as a functional compatibilizer of carboxymethyl starch/polyvinyl alcohol (CMS/PVA) blend to develop novel intelligent packaging film materials. The results demonstrated that the introduction of Cu-LTE nanocrystal into CMS/PVA blend brought about significant promotions regarding to the compatibility, mechanical strength (48.1 MPa), UV-protection (with UV transmittance of only 1.6 %), and moisture/oxygen barrier effectiveness, while preserving long-term colour stability of the blend film. Moreover, the developed CMS/PVA/Cu-LTE blend film featured remarkable antibacterial capacity (over 99.0 %) toward both E. coli and S. aureus bacteria, as well as outstanding colour change ability under ammonia environment. The developed CMS/PVA/Cu-LTE blend film also presented visually identifiable colour change during the monitoring of shrimp deterioration. These findings indicated that the developed CMS/PVA/Cu-LTE blend film should hold tremendous potential as an intelligent active packaging material.

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以羧甲基淀粉/PVA 为基础、以 Cu-LTE 纳米晶为功能相容剂的智能包装膜的开发与应用

在食品安全领域，能够及时有效地监测食品新鲜度的创新型智能包装材料至关重要。本研究制备并表征了对氨敏感的铜基金属有机框架（Cu-LTE）纳米晶体，并将其作为羧甲基淀粉/聚乙烯醇（CMS/PVA）共混物的功能性相容剂，用于开发新型智能包装膜材料。结果表明，在 CMS/PVA 共混物中引入 Cu-LTE 纳米晶后，共混膜的相容性、机械强度（48.1 兆帕）、紫外线防护性能（紫外线透过率仅为 1.6%）和湿气/氧气阻隔效果都得到了显著提升，同时还保持了长期的颜色稳定性。此外，所开发的 CMS/PVA/Cu-LTE 共混薄膜对大肠杆菌和金黄色葡萄球菌都具有显著的抗菌能力（超过 99.0%），并且在氨环境下具有出色的变色能力。所开发的 CMS/PVA/Cu-LTE 混合薄膜在监测虾的变质过程中还能呈现出肉眼可识别的颜色变化。这些研究结果表明，所开发的 CMS/PVA/Cu-LTE 混合薄膜作为一种智能活性包装材料具有巨大的潜力。

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来源期刊

Food Packaging and Shelf Life Agricultural and Biological Sciences-Food Science

CiteScore

14.00

自引率

8.80%

发文量

214

审稿时长

70 days

期刊介绍： Food packaging is crucial for preserving food integrity throughout the distribution chain. It safeguards against contamination by physical, chemical, and biological agents, ensuring the safety and quality of processed foods. The evolution of novel food packaging, including modified atmosphere and active packaging, has extended shelf life, enhancing convenience for consumers. Shelf life, the duration a perishable item remains suitable for sale, use, or consumption, is intricately linked with food packaging, emphasizing its role in maintaining product quality and safety.