There is a growing demand for the development of intelligent active packaging films to maintain and monitor the freshness of meat food. Herein, nano Co-based MOF (ZIF67) with ammonia-sensitive and antimicrobial functions was successfully synthesized and then integrated into cellulose acetate (CA) matrix to prepare intelligent active films. The impacts of ZIF67 incorporation on the structure, physical and functional characteristics of CA film were fully investigated. The results demonstrated that the ZIF67 nanofillers were evenly dispersed in CA matrix, resulting in remarkable improvement on tensile strength, toughness, thermal stability, UV barrier, hydrophobicity and water vapor barrier ability of CA film. Furthermore, the prepared CA/ZIF67 films exhibited superb antimicrobial and ammonia-sensitive functions. The CA/ZIF67 intelligent films turned their color from blue at beginning to brown during progressive spoilage of shrimp. These results revealed that the CA/ZIF67 films with excellent antimicrobial and ammonia-sensitive functions could be applied in intelligent active food packaging.

对开发智能活性包装薄膜以保持和监测肉类食品新鲜度的需求不断增长。在此，成功合成了具有氨敏感和抗菌功能的纳米钴基 MOF（ZIF67），然后将其整合到醋酸纤维素（CA）基质中制备智能活性薄膜。充分研究了 ZIF67 的掺入对 CA 膜的结构、物理和功能特性的影响。结果表明，ZIF67 纳米填料均匀分散在 CA 基质中，显着提高了 CA 薄膜的拉伸强度、韧性、热稳定性、紫外线阻隔性、疏水性和水蒸气阻隔能力。此外，制备的 CA/ZIF67 薄膜表现出极好的抗菌和氨敏感功能。CA/ZIF67智能膜在虾逐渐腐败变质过程中由最初的蓝色变为棕色。这些结果表明，具有优异抗菌和氨敏感功能的 CA/ZIF67 薄膜可应用于智能活性食品包装。