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).

TP 1在第一个资助期的核心任务是对纳米颗粒（NP）改性纤维增强聚合物（FRP）的力学性能进行定量成像分析。基于AFM的局部分析的物理化学性能的FRP显示了强烈的影响的颗粒基体界面的机械性能作为一个功能的表面改性。在亚微米尺度上的计算结果与宏观力学实验结果如弯曲模量、拉伸模量、断裂伸长率和断裂拉伸应力等吻合得很好。第一阶段集中在初级颗粒（14 nm）和它们与基体的界面上。在第二阶段，还将对附聚物进行测量。这些研究的纳米粒子之间的界面，并评估其在机械负荷下的作用。此外，为了全面了解嵌入NP的FRP沿着工艺链的性能变化，将在两个方向开展工作。为了详细研究颗粒表面的影响，Garnweitners教授小组以高度明确的方式对NP进行了化学改性。这些纳米粒子嵌入在实验室规模和检查的AFM和介电光谱方法在组Silbernagl/Sturm。在这里，保留了交互式方法，以提供嵌入纳米颗粒的机械性能图，用于数值建模（TP 2，Rolfes教授组）。此外，该分析产品组合还配有宽带介电谱仪（BDS; group Silbernagl/Sturm）。与原子力显微镜相比，这种方法不是基于成像的，而是在mm³面积的材料体积上进行整体测量。然而，这种方法提供了分子迁移率，因此甚至在分子水平上提供了更高的灵敏度，因为AFM：在各种颗粒浓度下的频率依赖性研究显示了颗粒的量，并分别显示了它们的基质相互作用或界面。温度依赖性BDS允许的结论，无论是局部或合作的分子流动性。除了分析和合成核心任务外，TP 1还与TP 4合作，引入了一种新技术，通过该技术，NP可以使用纳米载体羊毛在复合材料的关键点处被包含在内。这些NP嵌入电纺热塑性纤维中。可以将所得织物放置在模具中，具体而言，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）。