Impregnation process for gradient nanoparticle-reinforced structures

TP4(Ziegmann研究组)的重点是调查纳米粒子(NP)在树脂体系中对工艺和部件制造的影响。TP4的关键研究方面集中在关于重要材料(长丝距离、渗透率)和工艺参数(悬垂、压实)的材料(NP悬浮液和预制件)的工艺技术设计，以及在液体复合模塑(LCM)工艺中开发新的浸渍策略，以制造具有特定纳米颗粒分布的复杂纤维复合材料结构，以实现有针对性的局部可调性能曲线。在第二个资助期，基于平面层合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，需要一个粘结剂系统来将纺织品悬垂和固定在复杂形状的工具上。除了传统的粘结剂系统，还将研究一种新型的环氧可溶、电纺、热塑性纳米颗粒支撑纤维(纳米载体纤维)(在TP1中开发，Sturm/Silbernagl研究小组)，这种纤维可以用作局部粘结剂，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纺织品的宏观/微观孔隙率的描述，三个主要方向的渗透性调查，纳米颗粒的流动和过滤行为，流动和固化模拟，以及纳米颗粒流动行为的可视化，更具体地说，粒子在浸渍过程中的运动。项目4的调查密切基于项目1和项目3的结果，并将依次为项目2、5和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.