The Influence of Intermolecular Interactions between Maleic Anhydride, Cellulose Nanocrystal, and Nisin-Z on the Structural, Thermal, and Antimicrobial Properties of Starch-PVA Plasticized Matrix

Natural Polysaccharides in Drug Delivery and Biomedical Applications Pub Date : 2021-08-10 DOI:10.3390/polysaccharides2030040

T. V. D. Oliveira, P. V. Freitas, Cicero C. Pola, L. Terra, J. O. Silva, A. T. Badaró, Nelson S. Junior, Marciano M Oliveira, R. R. Silva, N. Soares

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引用次数: 4

Abstract

On behalf of a circular economy, regular plastics have been replaced by biodegradable packagings. Besides, active films have been applied to improve the shelf-life and quality of foods. In this work, blends were developed using starch as a low-cost natural polymer, mixed with poly(vinyl alcohol) due to its physical-chemical and biodegradable properties. Moreover, maleic anhydride (MaAh), cellulose-nanocrystal (CN), and nisin-z (N-Z) were added, respectively, as a compatibilizer, a mechanical-reinforce, and antimicrobial agents. The thermal stability of the films was analyzed, which blends’ melting temperature occurred around 200–207 °C, and it was influenced by CN, N-Z, and MaAh amounts. N-Z and MaAh acted against S. aureus and P. aeruginosa by compound diffusion (inhibition-halo around 1.85 and 2.18 cm); while S. Choleraesuis and E. coli were inhibited by contact. Therefore, these blends presented the potential to be used as active biodegradable packaging in the food industry.

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马来酸酐、纤维素纳米晶和Nisin-Z分子间相互作用对淀粉-聚乙烯醇增塑基质结构、热性能和抗菌性能的影响

作为循环经济的代表，普通塑料已经被可生物降解的包装所取代。此外，活性膜还被用于提高食品的保质期和质量。在这项工作中，利用淀粉作为一种低成本的天然聚合物，与聚乙烯醇混合，由于其物理化学和生物降解特性。此外，还添加了马来酸酐(MaAh)、纤维素纳米晶体(CN)和乳酸链球菌素-z (N-Z)，分别作为增容剂、机械增强剂和抗菌剂。对膜的热稳定性进行了分析，发现共混物的熔化温度在200 ~ 207℃左右，并受CN、N-Z和MaAh用量的影响。N-Z和MaAh对金黄色葡萄球菌和铜绿假单胞菌具有复合扩散作用(抑制晕在1.85和2.18 cm左右);而霍乱链球菌和大肠杆菌则受接触抑制。因此，这些混合物呈现出在食品工业中用作活性生物可降解包装的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Natural Polysaccharides in Drug Delivery and Biomedical Applications

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