采用静电纺丝技术制备用于食品包装的抗菌壳聚糖-聚乙烯醇共混膜

Fabrication of antibacterial chitosan-PVA blended film using electrospray technique for food packaging applications.

机构信息

College of Food Science, Sichuan Agricultural University, Yaan 625014, PR China; School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China.

College of Food Science, Sichuan Agricultural University, Yaan 625014, PR China.

出版信息

Int J Biol Macromol. 2018 Feb;107(Pt A):848-854. doi: 10.1016/j.ijbiomac.2017.09.044. Epub 2017 Sep 15.

DOI:10.1016/j.ijbiomac.2017.09.044

PMID:28923566

Abstract

In this study, blended films from poly(vinyl alcohol) (PVA) containing chitosan (CS) were prepared via a simple solution casting and electrospraying method. The structures of the PVA-CS films were characterized by Fourier-transform infrared spectroscopy. The morphologies of the films were observed by scanning electron microscopy. The thermal properties of the PVA-CS films were examined by thermogravimetry. The effects of CS contents on the mechanical properties, oxygen permeability values, water vapor permeation levels, and antibacterial behaviors against Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) strains were investigated. Compared to the pure PVA film, the PVA-CS films showed greater elongation at break, lower oxygen permeability, higher water barrier properties, and greater antibacterial activity, especially for the PVA:CS weight ratio of 75:25. The obtained results indicate the PVA-CS film may be a promising material for food packaging applications.

摘要

在这项研究中，通过简单的溶液浇铸和静电纺丝法制备了含有壳聚糖（CS）的聚乙烯醇（PVA）共混膜。通过傅里叶变换红外光谱对 PVA-CS 薄膜的结构进行了表征。通过扫描电子显微镜观察了薄膜的形态。通过热重分析研究了 PVA-CS 薄膜的热性能。考察了 CS 含量对力学性能、氧气透过率值、水蒸气透过率水平和对革兰氏阴性（大肠杆菌）和革兰氏阳性（金黄色葡萄球菌）菌株的抗菌行为的影响。与纯 PVA 薄膜相比，PVA-CS 薄膜具有更大的断裂伸长率、更低的氧气透过率、更高的水阻隔性能和更大的抗菌活性，特别是对于 PVA:CS 的重量比为 75:25 的情况。研究结果表明，PVA-CS 薄膜可能是一种有前途的食品包装应用材料。