This work shows the preparation of ethylene vinyl acetate copolymer/banana starch/Cloisite 20A organoclay (EVA/starch/C20A) nanocomposites by melt processing. Wide angle X-ray diffraction (WAXD), field emission scanning electron microscopy (FE-SEM), differential scanning calorimetry and thermogravimetric analysis were used to characterize the obtained nanocomposites. Mechanical properties were also determined. In addition, the performance of the nanocomposite films under composting was preliminarily studied; it was conducted using the soil burial test method. Despite knowing that the starch is difficult to process by extrusion, nanocomposite films with high homogeneity were obtained. In this case, C20A organoclay acts as an effective surfactant to make the starch natural polymer compatible with the EVA synthetic polymer. The good compatibility between EVA, starch and C20A clay was also deduced by the formation of intercalated and intercalated-exfoliated structures determined by WAXD and FE-SEM. Physical evidence of the damage in EVA/starch/C20A nanocomposite films after the composting test was observed. It is worth noting that despite the absence of starch, the EVA/C20A nanocomposite film, used as a control, also showed surface damage. This behavior is related to the organic modifier linked to clay C20A, which contains molecules derived from fatty acids that can be used as a food source for microorganisms.

中文翻译：

---

乙烯-乙酸乙烯酯/香蕉淀粉/ Cloisite 20A有机粘土纳米复合薄膜的熔融加工：结构，热行为和堆肥行为

这项工作显示了乙烯乙酸乙烯酯共聚物/香蕉淀粉/ Cloisite 20A的制备通过熔融加工制备有机粘土（EVA /淀粉/ C20A）纳米复合材料。使用广角X射线衍射（WAXD），场发射扫描电子显微镜（FE-SEM），差示扫描量热法和热重分析法来表征所获得的纳米复合材料。还确定了机械性能。此外，对堆肥下纳米复合薄膜的性能进行了初步研究。使用土壤掩埋试验方法进行。尽管知道淀粉难以通过挤出加工，但是获得了具有高均质性的纳米复合膜。在这种情况下，C20A有机粘土可作为有效的表面活性剂，使淀粉天然聚合物与EVA合成聚合物相容。EVA之间的良好兼容性，淀粉和C20A粘土还可以通过WAXD和FE-SEM确定的插层和插层剥落结构来推断。观察到堆肥试验后EVA /淀粉/ C20A纳米复合膜受损的物理证据。值得注意的是，尽管不含淀粉，但用作对照的EVA / C20A纳米复合膜也显示出表面损伤。此行为与链接至粘土C20A的有机改性剂有关，该改性剂包含衍生自脂肪酸的分子，可用作微生物的食物来源。还表现出表面损伤。此行为与链接至粘土C20A的有机改性剂有关，该改性剂包含衍生自脂肪酸的分子，可用作微生物的食物来源。还表现出表面损伤。此行为与链接至粘土C20A的有机改性剂有关，该改性剂包含衍生自脂肪酸的分子，可用作微生物的食物来源。