Laboratory of Agricultural and Food Biophysics, Institute of Biophysics, College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China; Laboratory of Muscle Biology and Meat Science, National Beef Cattle Improvement Center, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China; Laboratory of Meat Quality Analysis and Products Development, Ningxia Xihaigu Institute of High-end Cattle Industry, Haiyuan Hairun Agricultural Company, Haiyuan, Ningxia 755299, China.
Laboratory of Agricultural and Food Biophysics, Institute of Biophysics, College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China; Laboratory of Muscle Biology and Meat Science, National Beef Cattle Improvement Center, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China; Laboratory of Meat Quality Analysis and Products Development, Ningxia Xihaigu Institute of High-end Cattle Industry, Haiyuan Hairun Agricultural Company, Haiyuan, Ningxia 755299, China.
Int J Biol Macromol. 2023 Jul 1;242(Pt 1):124732. doi: 10.1016/j.ijbiomac.2023.124732. Epub 2023 May 4.
At present, food waste has become a serious issue and the use of petroleum-based food packaging films has resulted in a series of potential hazards. Therefore, more attention has been focused on the development of new food packaging materials. The polysaccharide-based composite film loaded with active substances considered to be an excellent preservative material. A novel packaging film based on sodium alginate and konjac glucomannan (SA-KGM) blended with tea polyphenols (TP) was prepared in the present study. The excellent microstructure of films was shown by atomic force microscopy (AFM). It was indicated by FTIR spectra that the components could interact with each other through hydrogen bonds, which was also confirmed by molecular docking simulation. Meanwhile, the mechanical properties, barrier property, oxidation property, antibacterial activity, and stability of the structure of the TP-SA-KGM film were significantly improved. The AFM images and results of molecular docking simulation indicated that TP could affect the cell wall of bacteria by acting with peptidoglycan. Finally, the film showed excellent preservation effects in both beef and apples, which suggested that TP-SA-KGM film could be a novel bioactive packaging material with wide application potential in food preservation.
目前，食物浪费已经成为一个严重的问题，而石油基食品包装薄膜的使用也带来了一系列潜在的危害。因此，人们越来越关注新型食品包装材料的开发。负载有被认为是优秀防腐剂物质的多糖基复合薄膜就是其中之一。本研究制备了一种新型的基于海藻酸钠和魔芋葡甘聚糖（SA-KGM）与茶多酚（TP）共混的包装薄膜。原子力显微镜（AFM）显示了薄膜具有优异的微观结构。傅里叶变换红外光谱（FTIR）表明，各成分可以通过氢键相互作用，分子对接模拟也证实了这一点。同时，TP-SA-KGM 薄膜的机械性能、阻隔性能、氧化性能、抗菌活性和结构稳定性都得到了显著提高。AFM 图像和分子对接模拟结果表明，TP 可以通过与肽聚糖相互作用来影响细菌的细胞壁。最后，该薄膜在牛肉和苹果的保鲜效果方面表现出色，这表明 TP-SA-KGM 薄膜可能是一种具有广泛应用潜力的新型生物活性包装材料，可用于食品保鲜。
