Rheology of nanoparticulate epoxy suspensions

纳米颗粒环氧悬浮液的流变学

• 批准号: 353306170
• 负责人: Professor Dr.-Ing. Carsten Schilde
• 金额: --
• 依托单位: Institut für Partikeltechnik
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/353306170?language=en
• 关键词: Rheology; nanoparticulate; epoxy; suspensions; Rheology; nanoparticulate; epoxy; suspensions

Disperse properties of particles like primary and secondary particle size, particle size distribution, aggregate structure, particle morphology and surface functionalization have significant effect on the processing and application of fiber-reinforced nanocomposites. Up to this time, only vague models exist for the description of these interdependencies. The fundamental question which needs to be answered is how disperse properties affect the structures formed along the process chain and the corresponding consequences on desired product properties. During the first funding period of this project, the influence of some factors was already characterized and the foundation was laid for the simulative access of the hypothesized working principles via coupled CFD-DEM-simulations. Throughout the second funding period, these results shall be used and refined to serve as parameters for a predictive analytical model for the describing the rheological properties. Besides particle properties, reaction kinetics is of major importance in the field of fiber-reinforced composites. The reaction kinetic itself is influenced by numerous parameters which shall be modelled after an extended experimental characterization. In addition, the validity of the mechanistic stress model shall be assessed further in order to gain in-depth understanding of the dispersing mechanisms in laminar shear flow.

分散粒子的特性，例如粒径和二次粒径，粒度分布，骨料结构，粒子形态和表面功能化对纤维增强纳米复合材料的加工和应用具有显着影响。到目前为止，仅存在模型的模型来描述这些相互依存关系。需要回答的基本问题是分散属性如何影响过程链中形成的结构以及对所需产品属性的相应后果。在该项目的第一个资金期间，某些因素的影响已经被表征，并通过耦合的CFD-DEM模拟奠定了基础，以模拟假设的工作原理。在第二个资金期间，应使用这些结果并精制作为描述流变特性的预测分析模型的参数。除了粒子特性外，反应动力学在纤维增强复合材料领域至关重要。反应动力学本身受到许多参数的影响，这些参数应在扩展实验表征后进行建模。此外，应进一步评估机械应力模型的有效性，以便深入了解层状剪切流中的分散机制。