壳聚糖/明胶/苹果多酚复合膜的制备及性能研究

Preparation and Properties of Chitosan/Gelatin/Apple Polyphenol Composite Films

目的 以壳聚糖、明胶、苹果多酚为基材,制备一种具有优良性能的绿色环保复合材料。方法 用溶液共混法制备壳聚糖/明胶/苹果多酚共混膜,用土埋法测试其降解性,用红外光谱(FT–IR)、X射线衍射仪(XRD)、扫描电镜(SEM)等对其进行表征,并对其力学性能等进行测试。结果 壳聚糖/明胶/苹果多酚复合膜的机械强度随苹果多酚的添加量的增加先变大后减小,当苹果多酚添加量为1%时有较好的拉伸强度;壳聚糖、明胶、苹果多酚三者具有良好的相容性;复合膜生物降解性良好。结论 引入合适比例的苹果多酚可有效提升复合膜的力学性能,制得的可降解复合膜在绿色食品包装领域有广泛的应用前景。

The work aims to prepare a green composite film with excellent properties based on chitosan, gelatin and apple polyphenols. A chitosan/gelatin/apple polyphenol blending film was prepared by solution mixing. Its degradability was tested by the soil embedding method. It was characterized by infrared spectroscopy, X-ray diffractor and scanning electron microscopy. And its mechanical properties were also tested. The results showed that the mechanical strength of chitosan/gelatin and apple polyphenol composite films increased first and then decreased with the addition of apple polyphenols, with better tensile strength at 1%;chitosan, gelatin and apple polyphenols had good compatibility;the composite film had good biodegradability. Adding appropriate proportion of apple polyphenols can effectively improve the mechanical properties of the composite film. The prepared biodegradable composite film has a wide application prospect in green food packaging.