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首页> 美国卫生研究院文献>Materials >Development of Eco-Sustainable PBAT-Based Blown Films and Performance Analysis for Food Packaging Applications
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Development of Eco-Sustainable PBAT-Based Blown Films and Performance Analysis for Food Packaging Applications

机译：基于生态可持续的PBAT吹膜和食品包装应用的性能分析的发展

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摘要

In this work, eco-sustainable blown films with improved performance, suitable for flexible packaging applications requiring high ductility, were developed and characterized. Films were made by blending two bioplastics with complementary properties—the ductile and flexible poly(butylene-adipate-co-terephthalate) (PBAT) and the rigid and brittle poly(lactic acid) (PLA)—at a 60/40 mass ratio. With the aim of improving the blends’ performance, the effects of two types of PLA, differing for viscosity and stereoregularity, and the addition of a commercial polymer chain extender (Joncryl®), were analyzed. The use of the PLA with a viscosity ratio closer to PBAT and lower stereoregularity led to a finer morphology and better interfacial adhesion between the phases, and the addition of the chain extender further reduced the size of the dispersed phase domains, with beneficial effects on the mechanical response of the produced films. The best system composition, made by the blend of PBAT, amorphous PLA, and the compatibilizer, proved to have improved mechanical properties, with a good balance between stiffness and ductility and also good transparency and sealability, which are desirable features for flexible packaging applications.
机译：在这项工作中，开发并表征了具有改进性能的生态可持续吹膜，适用于需要高延展性的灵活包装应用。通过将两种生物塑料与互补性（丁二烯 - 己二酸丁二醇酯）（丁二烯 - 己二酸丁二醇酯）（PBAT）和刚性和脆酸）（PLA）（PLA）（PLA）的韧性和柔性聚（乳酸）和60/40质量比进行制备薄膜。随着改善混合性能的目的，分析了两种类型的PLA的效果，不同于粘度和静态度，以及添加商业聚合物链增量剂（Joncryl®）。使用粘度比的PLA更接近PBAT和较低的立体度，导致阶段之间的细粒形态和更好的界面粘附，并且增链剂的添加进一步降低了分散相结构域的尺寸，对效果有益效果产生的薄膜的机械响应。通过PBAT，无定形PLA和增容剂的混合物制备的最佳系统组合物，证明具有改进的机械性能，刚度和延展性之间的平衡良好，以及良好的透明度和密封性，这是灵活的包装应用的理想特征。

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