Structure and properties of injection-molded nanocomposites of biobased polyamide 11 and fibrous sepiolite or layer-like montmorillonite nanofillers

聚酰胺11(PA 11)是一种生物基聚合物，具有相对较高的热稳定性、优异的耐化学性和合理的力学性能。通过使用纳米膜进行改性/增强，可以进一步改善性能，从而扩大应用范围。本项目的目的是评估层状蒙脱石和纤维状海泡石纳米颗粒的含量、化学成分和几何形状/长径比的变化对尼龙11纳米复合材料结构形成和性能的影响。除了分析长径比差异较大的纳米薄膜的增强效果外，本项目的一个主要目标是评估不同比表面积和表面化学的纳米薄膜在相关工艺条件下对聚合物基质结晶的成核效率及其对注射成型中皮肤/芯形态发展的影响。这一研究项目有望为进一步建立和开发具有更好力学性能的新型生物基工程聚合物材料做出贡献。随着结晶条件的变化，深入分析不同纳米填料对聚合物基质性能和结构形成的影响，将允许设计工艺路线，以获得特定的半结晶形态，从而获得纳米复合材料性能。

Polyamide 11 (PA 11) is a biobased polymer with a balanced property profile including relatively high thermal stability, excellent chemical resistance, and reasonable mechanical characteristics. Further improvement of properties, to widen the range of applications, is possible by modification/reinforcement with nanofillers. It is the aim of this project to evaluate the effects of variation of the content, chemistry, and geometry/aspect ratio of layer-like montmorillonite and fibrous sepiolite nanofillers on structure formation and selected properties of PA 11 based nanocomposites. A major goal of this project, besides the analysis of the reinforcing effect of nanofillers of largely different aspect ratio, is the evaluation of the nucleation efficiency of nanofillers of different specific surface area and surface chemistry on the crystallization of the polymer matrix at conditions relevant in processing and its influence on the development of skin/core morphologies in injection molding. The research project is expected to contribute to the further establishment/development of new biobased engineering polymeric materials with improved mechanical behavior. The in-depth analysis of the effect of different nanofillers on properties and structure formation of the polymer matrix as a function of the crystallization conditions will allow designing processing routes to obtain specific semicrystalline morphologies and therefore nanocomposite properties.