Interaction between epoxy matrix and nanoparticle

环氧基质与纳米颗粒之间的相互作用

• 批准号: 250786565
• 负责人: Professor Dr. Georg Garnweitner
• 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: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/250786565?language=en
• 关键词: Interaction; between; epoxy; matrix; nanoparticle

The core task of the TP1 in the first funding period was the quantitative imaging analysis of the mechanical properties of a nanoparticle (NP)-modified fiber-reinforced polymer (FRP). AFM-based local analysis of physico-chemical properties of the FRP showed the strong influence of the particle-matrix interphase on the mechanical properties as a function of surface modification. It has also shown that the results on the sub-micron scale agree very well with the results of macroscopic mechanical experiments such as flexural modulus, tensile modulus, elongation at break and tensile stress at break. The first period was focused on primary particles (14nm) and their interphase to the matrix. In the second period also measurements on agglomerates will be performed. These are studied in terms of the interphase between the nanoparticles and evaluated for their role under mechanical load. In addition, the work will be developed in two directions in order to obtain a comprehensive understanding of the property change of FRP along the process chain by embedding the NP.In order to investigate the influence of the particle surface in detail, chemical modification of the NP in a highly defined manner is carried out by Prof. Garnweitners group. These nanoparticles are embedded on a laboratory scale and examined by AFM and dielectric spectroscopy methods in the group Silbernagl/Sturm. Here, the interactive approach is retained to provide mechanical property maps of the embedded nanoparticles for use in numerical modelling (TP2, group of Prof. Rolfes). In addition, the analysis portfolio is complemented with broadband dielectric spectroscopy (BDS; group Silbernagl/Sturm). In contrast to AFM this method is not imaging-based but measures integrally over a material volume in mm³ area. However, this method provides molecular mobilities and thus even offers a higher sensitivity at the molecular level as the AFM: Frequency-dependent studies at various particle concentrations show the amount of particles and separately their matrix interactions or interphase. Temperature-dependent BDS allows conclusions whether molecular mobility is localized or cooperative. In addition to the analytical and synthetic core task TP1 cooperates with TP4 for introducing a new technique with which NP can be included at critical points in the composite material using nano-carrier fleece. These NP are embedded in electrospun thermoplastic fibers. The resulting fabric can be placed in the mold specifically, the fiber dissolves in the injected hot epoxy resin, leaving the nanoparticles in the matrix (Silbernagl/Sturm group).

TP1在第一个资金期间的核心任务是对纳米颗粒（NP）修饰的纤维增强聚合物（FRP）的机械性能的定量成像分析。基于AFM的FRP物理化学特性的局部分析表明，粒子 - 矩阵相间对机械性能的强大影响是表面修饰的函数。它还表明，亚微米尺度一致性的结果与宏观机械实验的结果（例如柔性模量，拉伸模量，断裂时伸长和休息时的拉力应力）的结果非常好。第一个时期的重点是主要颗粒（14nm）及其相互作用。在第二阶段还将对聚集物进行测量。这些是根据纳米颗粒之间的相互之间进行研究的，并在机械载荷下对其作用进行了评估。此外，这项工作将以两个方向开发，以便通过嵌入NP嵌入np。为了详细研究粒子表面的影响，以高度定义的方式对粒子表面的影响进行全面了解。这些纳米颗粒嵌入实验室尺度上，并在silbernagl/sturm组中通过AFM和饮食光谱法检查。在这里，保留了交互式方法，以提供嵌入式纳米颗粒的机械性能图，以用于数值建模（TP2，Rolfes教授）。此外，分析组合以宽带动态光谱法（BDS；组Silbernagl/Sturm）完成。与AFM相反，此方法不是基于成像的，而是基于MM³区域的材料体积的衡量。但是，该方法提供了分子迁移率，因此随着AFM：在各种粒子浓度下的频率依赖性研究时，在分子水平上甚至提供了更高的灵敏度，显示了颗粒的量并分别显示其矩阵相互作用或相互作用。依赖温度的BD允许结论分子迁移率是局部的还是合作的。除了分析和合成核心任务外，TP1还与TP4合作，用于引入一种新技术，使用nano-carrier羊毛可以在复合材料的关键点中包含NP。这些NP嵌入电纺热纤维中。所得的织物可以专门放置在模具中，纤维溶解在注入的热环氧树脂中，将纳米颗粒留在基质中（Silbernagl/Sturm组）。