Impregnation process for gradient nanoparticle-reinforced structures

TP 4（Ziegmann研究小组）的重点是研究树脂系统中纳米颗粒（NP）对工艺和部件制造的影响。TP 4的关键研究方面集中在材料的工艺技术设计上（NP悬浮液和预成型件）关于重要材料（丝距、渗透率）和工艺参数（覆盖，压实）以及液体复合材料成型（LCM）工艺中新的浸渍策略的开发，用于制造具有限定的纳米颗粒分布的复杂纤维复合材料结构，以便实现目标的局部可调节的特性曲线。在第二个资助期内，基于平面层压板开发的概念将转移到复杂结构中的梯度调整。对于复杂结构的制造，粘合剂系统对于将纺织品覆盖和固定在复杂形状的工具上是必要的。与传统的粘合剂系统平行，将研究一种新的、环氧树脂可溶解的、电纺的、用于纳米颗粒的热塑性支撑纤维（纳米载体纤维）（在TP 1中开发，研究小组Sturm/Silbernagl），其可以用作局部粘合剂，也可以用作最终结构中关键位置的局部纳米颗粒增强。研究的关键方面包括描述的宏观/微观孔隙率的纺织品，在所有三个主要方向的渗透性调查，流动和过滤行为的纳米粒子，流动和固化模拟，以及可视化的流动行为的纳米粒子，更具体地说，在浸渍过程中的颗粒运动。TP 4的研究紧密基于TP 1和TP 3的结果，并将为TP 2、TP 5和TP 6的研究工作提供基础。

The focus of TP4 (Research group Ziegmann) is to investigate the influence of nanoparticle (NP) in resin systems regarding the process and part manufacturing. The critical research aspects of the TP4 are focused on the process technological design of material (NP suspension and preform) regarding the important material (filament distance, permeability) and process parameters (draping, compaction) as well as development of new impregnation strategies in Liquid Composite Molding (LCM) processes for the manufacturing of complex fiber composite structures with defined nanoparticle distribution, in order to achieve targeted locally adjustable property profiles. In the second funding period, the concepts that are developed based on the plane laminates will be transferred to adjustment of the gradient in complex structures. For the manufacturing of complex structures, a binder system is necessary for the draping and fixing of textiles on the complex shaped tools. In parallel to conventional binder systems, a new, epoxy-solvable, electrospun, thermoplastic supporting fiber for nanoparticles (Nano Carrier Fiber) will be investigated (development in TP1, research group Sturm/Silbernagl), which could be used as local binder and also as local nanoparticle reinforcement in critical positions in the final structures. The research critical aspects include description of the macro/microporosity of the textiles, permeability investigation in all the three major directions, flow and filtration behavior of the nanoparticles, the flow and cure simulation, as well as visualization of the flow behavior of the nanoparticle, to more specifically, the particle movement during the impregnation process. The investigations in TP4 are based closely on the results from TP1 and TP3 and will deliver in turn the basics to research works of TP2, 5 and 6.