A controlled-release antibacterial active food packaging film was prepared from polylactic acid (PLA), poly (ε-caprolactone) (PCL), carbon nanotubes (CNTs), and cinnamaldehyde (CIN) by solvent evaporation method. The properties and antibacterial activities of CIN loaded PLA/CNTs/CIN film was characterized. Furthermore, the release behavior of CIN from PLA-based antibacterial film was quantified. The introduction of CNT and CIN would not significantly affect the barrier properties of PLA-based film, but would significantly enhance the UV resistance of the film. The co-action of CNTs and CIN led to the decrease of the glass transition temperature of the film and enhanced the elongation at break of the film. The PLA/CNTs/CIN film could continuously release CIN for 21 days in ambient storage, and antibacterial effect of the film on Staphylococcus aureus and Escherichia coli could be maintained for 21 days, during which the antibacterial effect gradually reduced and maintained for 7 days longer than the film without CNTs. According to the research results, The PLA/CNTs/CIN composites have great application potential in antibacterial active food packaging film.

通过溶剂蒸发法由聚乳酸（PLA），聚（ε-己内酯）（PCL），碳纳米管（CNT）和肉桂醛（CIN）制备控释抗菌活性食品包装膜。表征了CIN负载的PLA / CNTs / CIN薄膜的性能和抗菌活性。此外，定量了CIN从基于PLA的抗菌膜中的释放行为。CNT和CIN的引入不会显着影响PLA基薄膜的阻隔性能，但会显着提高薄膜的抗紫外线性。CNT与CIN的相互作用导致薄膜的玻璃化转变温度降低，并提高了薄膜的断裂伸长率。PLA / CNTs / CIN薄膜可在环境储存中连续释放CIN 21天，并且该薄膜具有抗菌作用金黄色葡萄球菌和大肠杆菌可以维持21天，在此期间，其抗菌作用逐渐降低，比没有CNTs的薄膜的维持时间长7天。研究结果表明，PLA / CNTs / CIN复合材料在抗菌活性食品包装膜中具有巨大的应用潜力。