氧化锌纳米粒子增强活性壳聚糖-聚乙烯醇薄膜在食品包装中的应用

Q2 Materials Science

Polymers from Renewable Resources Pub Date : 2023-05-09 DOI:10.1177/20412479231174442

Natalia Coneo, Yulieth Ramos, Gezira De Ávila, A. Herrera, A. Cremades

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引用次数: 3

摘要

活性包装是一种创新的替代品，可以提高食品质量并延长产品的保质期。本研究的主要目的是开发基于壳聚糖（Cs）、聚乙烯醇（PVA）和氧化锌纳米颗粒（ZnONps）的抗菌膜，以找到一种解决因病原微生物存在而导致食品变质的方法。采用绿色化学方法，以油桐叶提取物为原料，合成了ZnONps。用0；0.5；以及通过浇铸法使用不同比例的Cs:PVA的1%w/v的ZnONps。对其力学、理化、抗菌和抗真菌性能进行了评估。此外，分析了Cs/PVA/ZnONps薄膜对伊莎贝拉葡萄保护的影响（pH、可滴定酸度、重量损失、总可溶性固形物和腐烂率），并将其与商业涂层和未涂层葡萄进行了比较。结果表明，PVA含量的增加改善了力学性能，提高了吸水率。此外，ZnO纳米粒子的加入提高了薄膜的杨氏模量和拉伸强度。证明了纳米复合膜对大肠杆菌的抗菌活性。最后，证实了纳米复合薄膜比商业涂层更能保持伊莎贝拉葡萄的质量并延长其保质期6天，这肯定了它们在食品包装中的用途。据我们所知，以前没有任何与开发用ZnONPs增强的基于Cs/PVA的薄膜相关的工作测试过其作为水果包装的应用，通过物理化学分析确定了其对成熟过程的影响。图形摘要

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Active chitosan- poly (vinyl alcohol) film reinforced with zinc oxide nanoparticles for food packaging applications

Active packaging represents an innovative alternative to improve the quality of food and extend the shelf life of the product. The main aim of this research is to develop antibacterial films based on chitosan (Cs), polyvinyl alcohol (PVA), and zinc oxide nanoparticles (ZnONps) to find a solution of food deterioration due to the presence of pathogenic microorganisms. ZnONps were synthesized by green chemistry using the leaves extract of Petroselinum crispum. The films were fabricated with 0; 0.5; and 1% w/v of ZnONps using different proportions of Cs: PVA by the casting method. The mechanical, physicochemical, antimicrobial, and antifungal properties were assessed. Moreover, the influence of the Cs/PVA/ZnONps films in the conservation of the Isabella grape was analyzed (pH, titratable acidity, weight loss, total soluble solids, and decay rate) and it was compared to commercial coating and uncoated grapes. Results showed the increase in the content of PVA improved the mechanical properties and increased the water absorption. Besides, Young’s Module, and tensile strength of the films improved with ZnO nanoparticles addition. The antimicrobial activity of the nanocomposite films against Escherichia Coli was demonstrated. Finally, it was corroborated the nanocomposite films preserve the quality and extend the shelf life of Isabella grapes 6 days more than the commercial coating affirming their use in food packaging. To the best of our knowledge, no previous work related with the development of films based on Cs/PVA reinforced with ZnONPs has tested its application as fruits packaging, determining its effect on the ripening process through physic-chemical assays. Graphical Abstract

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来源期刊

Polymers from Renewable Resources Materials Science-Polymers and Plastics

CiteScore

3.50

自引率

0.00%

发文量

期刊介绍： Polymers from Renewable Resources, launched in 2010, publishes leading peer reviewed research that is focused on the development of renewable polymers and their application in the production of industrial, consumer, and medical products. The progressive decline of fossil resources, together with the ongoing increases in oil prices, has initiated an increase in the search for alternatives based on renewable resources for the production of energy. The prevalence of petroleum and carbon based chemistry for the production of organic chemical goods has generated a variety of initiatives aimed at replacing fossil sources with renewable counterparts. In particular, major efforts are being conducted in polymer science and technology to prepare macromolecular materials based on renewable resources. Also gaining momentum is the utilisation of vegetable biomass either by the separation of its components and their development or after suitable chemical modification. This journal is a valuable addition to academic, research and industrial libraries, research institutions dealing with the use of natural resources and materials science and industrial laboratories concerned with polymer science.