Bilayer biodegradable, eco-friendly films were prepared by co-extrusion film blowing, coupling polylactic acid (PLA) and Bio-flex ® (BIO). Furthermore, in the PLA layer, carvacrol (CRV) was added as a natural antimicrobial additive, whereas a nanoclay (D72T) was integrated to protect CRV from volatilization and to modulate release. The materials were analyzed by morphological, chemical-physical, mechanical testing. Furthermore, CRV release and degradation tests were performed. The results pointed out that coupling the two matrices allows gathering the stiffness of PLA with the ductility of BIO. Furthermore, the interlayer adhesion is promoted by CRV. D72T exerts a key-role in avoiding CRV volatilization, thus allowing more prolonged release. Degradation tests results highlight that bilayer films, while being particularly resistant in both acidic and neutral environments, showed a rapid degradation under alkaline conditions, which proved to be intermediate between those of the corresponding monolayers.

通过共挤出吹膜，偶联聚乳酸（PLA）和Bio-flex®（BIO）制备双层可生物降解的环保薄膜。此外，在PLA层中，添加了香芹酚（CRV）作为天然抗菌添加剂，而集成了纳米粘土（D72T）以保护CRV免受挥发并调节释放。通过形态，化学物理，机械测试对材料进行了分析。此外，还进行了CRV释放和降解测试。结果指出，将两个矩阵耦合可以收集PLA的刚度和BIO的延展性。此外，CRV促进了层间粘附。D72T在避免CRV挥发方面发挥了关键作用，因此可以延长释放时间。降解测试结果表明，双层薄膜，