Starch/PBAT blown antimicrobial films based on the synergistic effects of two commercial antimicrobial peptides

IF 7.7 1区化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY International Journal of Biological Macromolecules Pub Date : 2022-04-15 DOI:10.1016/j.ijbiomac.2022.01.183

Shan Gao, Xiaosong Zhai, Yue Cheng, Rui Zhang, Wentao Wang, Hanxue Hou

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引用次数: 18

Abstract

In this study, starch/PBAT antimicrobial film, based on the synergistic effects of two commercial antimicrobial peptides, was fabricated by blown extrusion. The blends with nisin exhibited higher storage modulus and complex viscosity than those with ε-polylysine hydrochloride (ε-PL) alone. ATR-FTIR spectra revealed that new intermolecular hydrogen bonds were formed among starch, nisin, and ε-PL. XRD results indicated that antimicrobial peptides facilitated the destruction of the original crystalline structure of starch. Combination of ε-PL and nisin enhanced tensile strength, flexibility, moisture permeability, and oxygen barrier property of the films with more homogeneous morphology. SP-PN1/2 film (1% ε-PL + 2% nisin) exhibited over 90% inhibition rates against Staphylococcus aureus and Escherichia coli, and prolonged the shelf life of fresh peaches. The antimicrobial film with nisin and ε-PL showed high safety, cost-effectiveness, consumer acceptability, and thus it had a good application prospect in the food packaging field.

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基于两种商用抗菌肽协同效应的淀粉/PBAT吹制抗菌膜

本研究利用两种商用抗菌肽的协同作用，采用吹挤法制备了淀粉/PBAT抗菌膜。与单独添加ε-聚赖氨酸(ε-PL)的共混物相比，含有nisin的共混物具有更高的储存模量和络合粘度。ATR-FTIR光谱显示淀粉、nisin和ε-PL之间形成了新的分子间氢键。XRD结果表明，抗菌肽促进了淀粉原有晶体结构的破坏。ε-PL与nisin的结合提高了薄膜的抗拉强度、柔韧性、透湿性和阻氧性能，膜的形貌更加均匀。SP-PN1/2膜(1% ε-PL + 2% nisin)对金黄色葡萄球菌和大肠杆菌的抑制率超过90%，延长了鲜桃的保质期。含有nisin和ε-PL的抗菌膜具有较高的安全性、性价比和消费者可接受性，在食品包装领域具有良好的应用前景。

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来源期刊

International Journal of Biological Macromolecules 生物-生化与分子生物学

CiteScore

13.70

自引率

9.80%

发文量

2728

审稿时长

64 days

期刊介绍： The International Journal of Biological Macromolecules is a well-established international journal dedicated to research on the chemical and biological aspects of natural macromolecules. Focusing on proteins, macromolecular carbohydrates, glycoproteins, proteoglycans, lignins, biological poly-acids, and nucleic acids, the journal presents the latest findings in molecular structure, properties, biological activities, interactions, modifications, and functional properties. Papers must offer new and novel insights, encompassing related model systems, structural conformational studies, theoretical developments, and analytical techniques. Each paper is required to primarily focus on at least one named biological macromolecule, reflected in the title, abstract, and text.