Biology and Environmental Engineering College, Zhejiang Shuren University, Hangzhou 310015, China.
Biology and Environmental Engineering College, Zhejiang Shuren University, Hangzhou 310015, China.
Int J Biol Macromol. 2019 Dec 1;141:545-552. doi: 10.1016/j.ijbiomac.2019.09.035. Epub 2019 Sep 6.
Of late, the demand for food-packaging materials, in particular, multifunction packaging materials that are biodegradable; antibacterial; have good mechanical and barrier properties; and are edible and transparent, has increased considerably. In this study, we prepared chitosan (CS)/ε-polylysine (PL) biofilms with different CS-to-PL ratios. We studied the preparation, mechanical properties, microstructures, thermal stability, transparency, water-vapor permeability, oil permeability, and antibacterial properties of the composite CS/PL biofilms. The results demonstrate that CS/PL biofilms are mechanically strong, have good thermal stability, high transparency, low water-vapor and oil permeability, and extensive antibacterial properties that act against Escherichia coli, Bacillus subtilis, and yeast. Therefore, we therefore conclude that CS/PL biofilms are promising food-packaging materials.
近年来，人们对食品包装材料的需求大幅增加，特别是对具有生物降解性、抗菌性、良好的机械和阻隔性能、可食用和透明等特点的多功能包装材料的需求大幅增加。在本研究中，我们制备了不同壳聚糖（CS）/ε-聚赖氨酸（PL）比例的 CS/PL 生物膜。我们研究了复合 CS/PL 生物膜的制备、力学性能、微观结构、热稳定性、透明度、水蒸气透过性、油透过性和抗菌性能。结果表明，CS/PL 生物膜具有机械强度高、热稳定性好、透明度高、水蒸气和油透过性低、对大肠杆菌、枯草芽孢杆菌和酵母具有广泛抗菌性能等特点。因此，我们得出结论，CS/PL 生物膜是有前途的食品包装材料。
