Instituto de Ingeniería de Alimentos para el Desarrollo, Departamento de Tecnología de Alimentos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain.
Instituto de Ingeniería de Alimentos para el Desarrollo, Departamento de Tecnología de Alimentos, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain.
Carbohydr Polym. 2015 Aug 20;127:282-90. doi: 10.1016/j.carbpol.2015.03.080. Epub 2015 Apr 3.
Bilayer films consisting of one layer of PCL with either one of thermoplastic starch (S) or one of thermoplastic starch with 5% PCL (S95) were obtained by compression molding. Before compression, aqueous solutions of ascorbic acid or potassium sorbate were sprayed onto the S or S95 layers in order to plasticize them and favor layer adhesion. S95 films formed bilayers with PCL with very good adhesion and good mechanical performance, especially when potassium sorbate was added at the interface. All bilayers enhanced their barrier properties to water vapour (up to 96% compared to net starch films) and oxygen (up to 99% compared to PCL pure). Bilayers consisting of PCL and starch containing 5% PCL, with potassium sorbate at the interface, showed the best mechanical and barrier properties and interfacial adhesion while having active properties, associated with the antimicrobial action of potassium sorbate.
通过压缩成型获得了由一层聚己内酯（PCL）与热塑性淀粉（S）或 5%PCL 的热塑性淀粉（S95）之一组成的双层膜。在压缩之前，将抗坏血酸或山梨酸钾的水溶液喷在 S 或 S95 层上，以使其增塑并有利于层间粘附。S95 膜与 PCL 形成了具有非常好的粘附力和良好机械性能的双层膜，特别是在界面处添加山梨酸钾时。所有双层膜都提高了它们对水蒸气（与纯淀粉膜相比高达 96%）和氧气（与纯 PCL 相比高达 99%）的阻隔性能。由 PCL 和含有 5%PCL 的淀粉组成的双层膜，在界面处含有山梨酸钾，具有最佳的机械和阻隔性能以及界面粘附力，同时具有与山梨酸钾的抗菌作用相关的活性性能。
