生物模板纳米纤维素/氧化锌杂化增强聚乙烯醇/壳聚糖膜的协同抗菌活性增强食品保鲜

IF 10.6 1区农林科学 Q1 FOOD SCIENCE & TECHNOLOGY

Food Packaging and Shelf Life Pub Date : 2025-09-17 DOI:10.1016/j.fpsl.2025.101616

Dan Chen, Shiyu Lin, Liming Cao, Wei Huang

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引用次数: 0

摘要

抗菌食品包装在保持食品质量和延长保质期方面起着至关重要的作用。聚乙烯醇（PVA）在食品包装中有着广泛的应用，但其固有的抗菌性能不足限制了其广泛应用。氧化锌是一种有效的抗菌剂。然而，ZnO纳米粒子的均匀分散仍然是一个挑战。为了解决这一问题，利用纤维素纳米晶体（CNC）和纤维素纳米纤维（CNF）作为生物模板，在其表面原位加载ZnO，构建了杂交NPs。然后将这些杂化NPs掺入聚乙烯醇/壳聚糖（4:1,w/w）的复合材料中，制备透明抗菌的包装薄膜。结果表明，ZnO负载在CNC或CNF表面表现出明显的形貌特征。抑菌实验表明，CS与ZnO的组合具有有机-无机协同抑菌活性。此外，杂化NPs增强了材料的机械强度和疏水性，其中CNF-ZnO表现出更强的增强作用。草莓保藏试验表明，该膜的保藏效果优于PE膜和PVA/CS膜，在保持果实品质和延长保质期方面效果显著。

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Bio-templated nanocellulose/ZnO hybrids reinforced PVA/chitosan films with synergistic antibacterial activity for enhanced food preservation

Antibacterial food packaging plays a crucial role in preserving food quality and extending shelf life. Polyvinyl alcohol (PVA) is widely used in food packaging, but its lack of inherent antimicrobial properties restricts its wide applications. Zinc oxide (ZnO) is an effective antibacterial agent. However, the uniform dispersion of ZnO nanoparticles (NPs) remains a challenge. To address this, hybrid NPs were constructed using cellulose nanocrystals (CNC) and cellulose nanofibrils (CNF) as bio-templates with ZnO in-situ loading onto their surfaces. These hybrid NPs were then incorporated into PVA/chitosan (4:1, w/w) compound to prepare transparent and antibacterial packaging films. The results indicate that ZnO loaded on the surfaces of CNC or CNF exhibited distinct morphological features. Antibacterial tests revealed that the combination of CS and ZnO exhibited organic-inorganic synergistic antibacterial activity. Furthermore, the hybrid NPs enhanced the mechanical strength and hydrophobicity, with CNF-ZnO showing superior reinforcement. Preservation tests on strawberry demonstrated that the films outperformed PE and PVA/CS films, indicating their effectiveness in maintaining fruit quality and prolonging shelf life.

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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.