Development and Characterization of Antimicrobial Nisin/MMT K10/AgNPs Nanocomposite Coatings on Oxygen Plasma Surface-Modified Polypropylene for Food Packaging Applications

IF 5.3 2区农林科学 Q1 FOOD SCIENCE & TECHNOLOGY

Food and Bioprocess Technology Pub Date : 2024-11-25 DOI:10.1007/s11947-024-03683-8

Vishnuvarthanan Mayakrishnan, Raja Venkatesan, Asha Anish Madhavan

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引用次数: 0

Abstract

In this study, the antimicrobial nisin nanocomposites were prepared by the addition of silver nanoparticles along with varying concentrations of montmorillonite K10 nanoclay into nisin. These nanocomposites were coated on the oxygen plasma surface-modified polypropylene (PP). The coated film was characterized by various techniques, and the novelty of this research work lies in the use of nisin, AgNPs, and MMT K10 which led to positive effects on various properties in food packaging applications. The thickness of the nisin-based coated nanocomposites was calculated by scanning electron microscopy. The functional groups and dispersion of nano clays in the preparation of nisin-based bio nanocomposites were analysed via Fourier transform infrared spectroscopy and X-ray diffraction spectroscopy. Contact angle analysis was used to determine whether the wettability of the coated samples increased due to the addition of AgNPs. The surface colour and opacity were found to be enhanced after the inclusion of MMT K10 and AgNPs. Nisin with 5 wt% MMT K10 nano clay and AgNPs coating provided promising barrier properties such as a low oxygen transmission rate of 369.65 cc/m².day.atm and a low water vapour transmission rate of 1.72 g/m².day. Additionally, the same concentration had the best tensile strength (13.14 MPa) and coating adhesion strength (8.1 N/cm) which were better than those of the other various concentrations. The antimicrobial properties of nisin nanocomposite-coated PP were evaluated against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) microorganisms. The nano migration of AgNPs from the coating was calculated by inductively coupled plasma‒mass spectrometry, and it was under the limit stated by European regulations. This high-performance nisin/MMT K10/AgNPs-coated PP film has potential practical applications in active food packaging.

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食品包装用氧等离子体表面改性聚丙烯抗菌Nisin/MMT K10/AgNPs纳米复合涂层的研制与表征

在本研究中，通过在nisin中加入不同浓度的蒙脱土K10纳米粘土，制备了抗菌nisin纳米复合材料。这些纳米复合材料被涂覆在氧等离子体表面改性聚丙烯（PP）上。涂膜采用多种技术表征，本研究工作的新颖之处在于nisin， AgNPs和MMT K10的使用对食品包装应用中的各种性能产生了积极的影响。利用扫描电子显微镜计算了乳清蛋白基包覆纳米复合材料的厚度。利用傅里叶变换红外光谱和x射线衍射光谱分析了纳米粘土在制备乳清基生物纳米复合材料中的官能团和分散性。使用接触角分析来确定是否由于AgNPs的加入而增加了涂层样品的润湿性。发现MMT K10和AgNPs加入后，表面颜色和不透明度增强。Nisin具有5 wt% MMT K10纳米粘土和AgNPs涂层，具有良好的阻隔性能，例如369.65 cc/m2.day的低氧透过率。水蒸气透过率低，为1.72 g/m2.day。同一浓度的涂层抗拉强度为13.14 MPa，涂层附着强度为8.1 N/cm，均优于其他不同浓度的涂层。研究了nisin纳米复合包被PP对革兰氏阳性（金黄色葡萄球菌）和革兰氏阴性（大肠杆菌）微生物的抗菌性能。采用电感耦合等离子体质谱法对镀层中AgNPs的纳米迁移量进行了计算，其迁移量在欧洲规定的限制范围内。这种高性能nisin/MMT K10/ agnps包覆PP膜在活性食品包装中具有潜在的实际应用前景。

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来源期刊

Food and Bioprocess Technology 农林科学-食品科技

CiteScore

9.50

自引率

19.60%

发文量

200

审稿时长

2.8 months

期刊介绍： Food and Bioprocess Technology provides an effective and timely platform for cutting-edge high quality original papers in the engineering and science of all types of food processing technologies, from the original food supply source to the consumer’s dinner table. It aims to be a leading international journal for the multidisciplinary agri-food research community. The journal focuses especially on experimental or theoretical research findings that have the potential for helping the agri-food industry to improve process efficiency, enhance product quality and, extend shelf-life of fresh and processed agri-food products. The editors present critical reviews on new perspectives to established processes, innovative and emerging technologies, and trends and future research in food and bioproducts processing. The journal also publishes short communications for rapidly disseminating preliminary results, letters to the Editor on recent developments and controversy, and book reviews.