Confronting the escalating challenges of food waste and safety, primarily attributed to microbial-induced spoilage, this investigation unveils a cutting-edge nanozyme-based antimicrobial packaging paradigm with self-activating mechanism (CMn-CS film), employing low-thermal aid to optimize the preservation of fruits and vegetables. At its core, the system amalgamates a carbon nanotube-supported MnO (CMn) filler within a chitosan (CS) film matrix. The fabrication of the CMn complex involves a dual-stage process, initially focusing on the immobilization of Mn ions, followed by the wet chemical nucleation of MnO crystals. A pivotal feature of this construct is the weak acidity of CS matrix, which imparts the CMn-CS film with a self-activating capacity, facilitating an optimal environment for the manifestation of oxidase-like activity. The CMn-CS film exhibits a synergistic antimicrobial efficacy, derived from the augmented oxidase-mimetic and photothermal characteristics of CMn, in conjunction with the intrinsic microbial capture and killing capabilities of CS. This translates into formidable bactericidal proficiency (exceeding 99.99 % for bacteria and 99.67 % for mold), swift action (within 10 min), and a requirement for minimal auxiliary heat (56.4 ℃). Based on this, the CMn-CS film significantly prolongs the shelf life of kumquats, extending its shelf life by 2.3 times. The augmented mechanical strength, improved barrier qualities, and demonstrated safety profile of the film underscore its potential for practical applications. Collectively, the CMn-CS film stands out as an exceptionally suitable method for the effective preservation of perishable goods, tackling fundamental concerns in food safety and wastage mitigation.

中文翻译：

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自主、温度增强的模拟氧化酶多模式抗菌薄膜，可延长易腐产品的保存时间


面对不断升级的食品浪费和安全挑战（主要归因于微生物引起的腐败），这项研究推出了一种基于纳米酶的尖端抗菌包装范例，具有自激活机制（CMn-CS 薄膜），采用低热辅助来优化水果和蔬菜的保存。该系统的核心是将碳纳米管支撑的 MnO (CMn) 填料合并到壳聚糖 (CS) 薄膜基质中。 CMn 络合物的制造涉及双阶段过程，最初侧重于 Mn 离子的固定，然后是 MnO 晶体的湿化学成核。该结构的一个关键特征是CS基质的弱酸性，赋予CMn-CS膜自激活能力，为氧化酶样活性的表现提供最佳环境。 CMn-CS 薄膜表现出协同抗菌功效，源自 CMn 增强的氧化酶模拟和光热特性，以及 CS 固有的微生物捕获和杀灭能力。这意味着强大的杀菌能力（对细菌超过 99.99%，对霉菌超过 99.67%）、快速作用（10 分钟内）以及最小的辅助热量要求（56.4℃）。基于此，CMn-CS膜显着延长了金橘的保质期，使其保质期延长了2.3倍。该薄膜机械强度的增强、阻隔质量的提高以及所展示的安全性凸显了其实际应用的潜力。总的来说，CMn-CS 薄膜是一种非常适合有效保存易腐烂货物的方法，解决了食品安全和减少浪费的基本问题。