Department of Chemistry, Motilal Nehru National Institute of Technology, Allahabad 211004, India.
Int J Biol Macromol. 2009 Nov 1;45(4):372-6. doi: 10.1016/j.ijbiomac.2009.07.006. Epub 2009 Jul 28.
This work aimed to develop a novel antimicrobial coating based on chitosan and PVA to evaluate its effect on minimally processed tomato by means of microbiological analyses. In this report an antimicrobial film was prepared by blending chitosan (CS) and poly(vinyl alcohol) (PVA) with glutaraldehyde as the cross-linker. The miscibility and morphology of the film were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The thermal property of the chitosan-PVA film was examined by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The microbiological screening has demonstrated the antimicrobial activity of the film against food pathogenic bacteria viz. Escherichia coli, Staphylococcus aureus, and Bacillus subtilis. The obtained results indicate the film may be a promising material for food packaging applications.
本工作旨在开发一种基于壳聚糖和 PVA 的新型抗菌涂层，通过微生物分析评估其对轻度加工番茄的影响。在本报告中，通过将壳聚糖 (CS) 和聚乙烯醇 (PVA) 与戊二醛混合作为交联剂来制备抗菌膜。通过 X 射线衍射 (XRD) 和扫描电子显微镜 (SEM) 研究了薄膜的混溶性和形态。通过差示扫描量热法 (DSC) 和热重分析 (TGA) 研究了壳聚糖-PVA 薄膜的热性能。微生物筛选表明，该膜对食品致病菌（即大肠杆菌、金黄色葡萄球菌和枯草芽孢杆菌）具有抗菌活性。所得结果表明，该膜可能是一种有前途的食品包装材料。
