Films for agricultural applications, such as greenhouses films or mulching films are generally made of polyolefins such as linear low-density polyethylene (LLDPE) or low-density polyethylene. However, the use of biodegradable and/or compostable polymers is increasing, which enjoy the additional advantage that they can be left on the site since a fine life would be gradually assimilated to the underlying soil. Nevertheless, biodegradable polymeric films often do not have suitable mechanical performances. In this work, biodegradable polymer-based nanocomposite films are prepared by film blowing and compared with traditional LLDPE based nanocomposites. In particular, a biodegradable polymer blend and two different inorganic nanofillers (an organo-modified clay and a calcium carbonate with a hydrophobic coating) are used for the preparation of the nanocomposites. A detailed investigation of obtained materials is performed through rheological, mechanical, and optical characterizations. Adding nanofillers led to an increase of rigidity and tear strength of blown films without negatively affecting their ductility.

中文翻译：

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用于农业应用的可生物降解聚合物纳米复合材料的吹膜

用于农业应用的薄膜，例如温室薄膜或地膜，通常由聚烯烃制成，例如线性低密度聚乙烯 (LLDPE) 或低密度聚乙烯。然而，可生物降解和/或可堆肥聚合物的使用正在增加，它们享有额外的优势，即它们可以留在现场，因为美好的生活将逐渐融入下面的土壤中。然而，可生物降解的聚合物薄膜通常不具有合适的机械性能。在这项工作中，可生物降解的聚合物基纳米复合薄膜是通过吹膜制备的，并与传统的 LLDPE 基纳米复合材料进行比较。特别是，可生物降解的聚合物混合物和两种不同的无机纳米填料（有机改性粘土和具有疏水涂层的碳酸钙）用于制备纳米复合材料。通过流变学、机械和光学表征对获得的材料进行详细研究。添加纳米填料可提高吹塑薄膜的刚度和撕裂强度，而不会对其延展性产生负面影响。