Abstract The development of konjac glucomannan (KGM) based films for use in food packaging has aroused increasing attention due to biodegradability, compatibility, and availability. Epigallocatechin gallate (EGCG) loaded dialdehyde glucomannan (DG) was incorporated into a gelatin (G) solution to improve the functional properties of DGG film. Rutin functionalized cellulose nanocrystal (RCNC) was incorporated into a DG/G matrix (DGG). The influences of RCNC addition on the structural, mechanical properties, barrier and optical properties were investigated. The RCNC@DGG films were prepared by the solvent casting method. The surface morphology of the RCNC@DGG films were analyzed by SEM and AFM. The crystal structure and thermal ability of the film were investigated by XRD and TGA-DTG. Elemental and characteristic peak changes were evaluated by FT-IR. The microstructure of the films showed that the introduced RCNC appeared to be dispersed within the DGG matrix, thereby decreasing the free volume, and enhancing RCNC@DGG films' mechanical and barrier properties. Compared with DGG film, RCNC@DGG nanocomposite films showed excellent antibacterial activity against food-borne pathogens, due to the antibacterial property of the EGCG. Therefore, RCNC@DGG nanocomposite films showed the potential for applications in active food packaging materials.

中文翻译：

---

用于食品包装的含有 EGCG 的二醛葡甘露聚糖/明胶基质的纳米复合薄膜的增强功能特性

摘要 用于食品包装的魔芋葡甘露聚糖 (KGM) 基薄膜的开发因其可生物降解性、相容性和可用性而引起越来越多的关注。将表没食子儿茶素没食子酸酯 (EGCG) 负载的二醛葡甘露聚糖 (DG) 掺入明胶 (G) 溶液中，以改善 DGG 膜的功能特性。芦丁功能化纤维素纳米晶体 (RCNC) 被纳入 DG/G 基质 (DGG)。研究了RCNC添加对结构、机械性能、阻隔和光学性能的影响。RCNC@DGG薄膜采用溶剂浇铸法制备。通过SEM和AFM分析了RCNC@DGG薄膜的表面形貌。通过XRD和TGA-DTG研究了薄膜的晶体结构和热性能。通过 FT-IR 评估元素和特征峰的变化。薄膜的微观结构表明，引入的 RCNC 似乎分散在 DGG 基体中，从而降低了自由体积，提高了 RCNC@DGG 薄膜的机械和阻隔性能。与 DGG 薄膜相比，由于 EGCG 的抗菌特性，RCNC@DGG 纳米复合薄膜对食源性病原体显示出优异的抗菌活性。因此，RCNC@DGG 纳米复合薄膜显示出在活性食品包装材料中的应用潜力。由于EGCG的抗菌特性。因此，RCNC@DGG 纳米复合薄膜显示出在活性食品包装材料中的应用潜力。由于EGCG的抗菌特性。因此，RCNC@DGG 纳米复合薄膜显示出在活性食品包装材料中的应用潜力。