College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, PR China.
College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, PR China.
Int J Biol Macromol. 2020 Jul 1;154:1205-1214. doi: 10.1016/j.ijbiomac.2019.10.275. Epub 2019 Nov 12.
In the present study, the antioxidant chitosan (CS)-banana peels extract (BPE) composite film was developed. The different content of BPE (4%, 8% and 12%) was added to the CS film not only as the antioxidant but also as the cross-linking. The CS, CS-4% BPE, CS-8% BPE and CS-12% BPE films were characterized by scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD) and thermogravimetric analysis (TGA). The physical and mechanical properties possessed by the CS and CS-BPE films were compared as well, and the CS-4 %BPE composite film exhibited the most excellent properties. The decline in moisture contents, water solubility and water vapor permeability of CS-BPE composite film indicated the reduced hydrophilicity. Moreover, the CS-BPE composite film exhibited excellent antioxidant activity in different food simulants. Finally, the optimal concentration of CS-BPE coating treatment was identified and applied to apple fruit, and the results showed that CS-BPE coating was more capable of improving the postharvest quality of apple fruit than CS coating. This study evidences the promising nature of CS-BPE composite film and coating as a desirable alternative for active packaging and it is believed as conducive to valorization of banana peel by-products for allied applications.
在本研究中，开发了一种具有抗氧化性能的壳聚糖（CS）-香蕉皮提取物（BPE）复合膜。不同含量的 BPE（4%、8%和 12%）被添加到 CS 膜中，不仅作为抗氧化剂，还作为交联剂。通过扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）、X 射线衍射分析（XRD）和热重分析（TGA）对 CS、CS-4%BPE、CS-8%BPE 和 CS-12%BPE 薄膜进行了表征。还比较了 CS 和 CS-BPE 薄膜的物理和机械性能，CS-4%BPE 复合膜表现出最优异的性能。CS-BPE 复合膜的水分含量、水溶性和水蒸气透过率下降表明其亲水性降低。此外，CS-BPE 复合膜在不同的食品模拟物中表现出优异的抗氧化活性。最后，确定了 CS-BPE 涂层处理的最佳浓度，并将其应用于苹果果实，结果表明 CS-BPE 涂层比 CS 涂层更能提高苹果果实的采后品质。本研究证明了 CS-BPE 复合膜和涂层作为一种有前途的活性包装替代品的特性，这有助于香蕉皮副产品的增值及其在相关领域的应用。
