Zhang Yan, Tang Qun, Huang Kangqi, Xu Zongshu, Feng Shaoxiong, Li Heping, Zou Zhiming
Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China.
Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China.
Carbohydr Polym. 2023 Feb 15;302:120375. doi: 10.1016/j.carbpol.2022.120375. Epub 2022 Nov 23.
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.
为了维持和监测肉类食品的新鲜度，对智能活性包装薄膜的开发需求日益增长。在此，成功合成了具有氨敏和抗菌功能的纳米钴基金属有机框架（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。全面研究了ZIF67的掺入对CA薄膜结构、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，显著提高了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薄膜表现出优异的抗菌和氨敏功能。在虾逐渐变质过程中，CA/ZIF67智能薄膜的颜色从最初的蓝色变为棕色。这些结果表明，具有优异抗菌和氨敏功能的CA/ZIF67薄膜可应用于智能活性食品包装。
