Abstract The high demand for food safety and quality has stimulated the investigation of antibacterial packaging films based on natural biomaterials. Capsaicin, an effective extract of red chili, is thought to be a favorable antibacterial candidate in food packaging. Herein, FeIII doped hollow metal-organic frameworks (FeIII-HMOF-5) were prepared as promising nanocarriers for capsaicin and incorporated into gelatin/chitosan matrix to fabricate antibacterial packaging films. FeIII-HMOF-5 regulated the hydrophobicity of capsaicin and effectively solved the phase separation problem. The addition of capsaicin loaded FeIII-HMOF-5 into gelatin/chitosan film significantly improved the tensile strength, water vapor permeability and UV barrier properties. Moreover, Cap-FeIII-HMOF-5 endowed efficient antimicrobial activity against E. coli to gelatin/chitosan films by practical application on fresh apple cubes. The strategy proposed here provides an effective way to develop promising antibacterial biomaterials for food packaging.

中文翻译：

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用于食品包装的载有辣椒素的 MOFs 的明胶/壳聚糖薄膜的抗菌性能增强

摘要 对食品安全和质量的高要求刺激了基于天然生物材料的抗菌包装膜的研究。辣椒素是一种有效的红辣椒提取物，被认为是食品包装中一种有利的抗菌候选物。在此，FeIII 掺杂的中空金属有机骨架 (FeIII-HMOF-5) 被制备为有前途的辣椒素纳米载体，并将其掺入明胶/壳聚糖基质中以制造抗菌包装膜。FeIII-HMOF-5调节辣椒素的疏水性，有效解决了相分离问题。在明胶/壳聚糖薄膜中加入负载辣椒素的 FeIII-HMOF-5 显着提高了拉伸强度、水蒸气渗透性和紫外线阻隔性能。此外，Cap-FeIII-HMOF-5 对大肠杆菌具有有效的抗菌活性。通过在新鲜苹果块上的实际应用，将大肠杆菌转化为明胶/壳聚糖薄膜。这里提出的策略为开发用于食品包装的有前途的抗菌生物材料提供了一种有效的方法。