Cao Aoguo, Huang Dajian, Wang Zhehui, Hu Binbin, Qiang Xiaohu
School of Material Science and Engineering, Lanzhou Jiaotong University Lanzhou 730070 PR China
RSC Adv. 2025 Jan 2;15(1):124-134. doi: 10.1039/d4ra07107g.
Biodegradable food packaging has gained significant attention owing to environmental concerns. Chitosan (CS), a natural polysaccharide, is popular in packaging films, however, its high hydrophilicity, brittleness, and low mechanical strength limit its use. To improve CS film performance, kafirin (Kaf), glycerol (GE), and tannic acid (TA) were added to create biocomposite films. The response surface method (RSM) was used to develop predictive models, with Kaf, GE, and TA as independent variables. Optimal film properties were achieved with a CS to Kaf ratio of 9 : 1, 20% GE as a plasticizer, and 5% TA. The addition of Kaf and TA increased the tensile strength and improved hygroscopicity, solubility loss, swelling, and water contact angle. GE enhanced the film flexibility. Overall, the composite films showed improved mechanical strength, water resistance, and UV resistance, indicating strong potential for food packaging applications.
由于环境问题，可生物降解食品包装受到了广泛关注。壳聚糖（CS）是一种天然多糖，在包装薄膜中很受欢迎，然而，其高亲水性、脆性和低机械强度限制了它的应用。为了改善CS薄膜的性能，添加了玉米醇溶蛋白（Kaf）、甘油（GE）和单宁酸（TA）来制备生物复合薄膜。以Kaf、GE和TA作为自变量，采用响应面法（RSM）建立预测模型。当CS与Kaf的比例为9:1、增塑剂GE为20%、TA为5%时，可获得最佳的薄膜性能。添加Kaf和TA提高了拉伸强度，并改善了吸湿性、溶解损失、溶胀和水接触角。GE增强了薄膜的柔韧性。总体而言，复合薄膜表现出改善的机械强度、耐水性和抗紫外线性，显示出在食品包装应用中的巨大潜力。
