SPP 1681: Field Controlled Particle Matrix Interaction: Synthesis, Multi-Scale Modelling and Application of Magnetic Hybrid-Materials

磁场的使用是用于控制材料性质的外部刺激，这具有相当大的技术兴趣，因为磁场可以容易地产生和控制。磁性受控材料，如磁性纳米和微米颗粒的悬浮液-铁磁流体和磁流变流体-具有在合理的技术努力下表现出材料行为的强烈变化的能力。在由复杂基质中的颗粒磁性组分形成的材料中，颗粒和基质的相互影响提供了材料行为中的附加参数组。这可以为材料特性的磁控改变提供可能性。颗粒与周围基质之间相互作用的知识是理解材料行为本身的重要因素，因此是有针对性地开发此类材料用于致动器和传感器中的新应用的基础。优先计划主要集中在五个关键问题上：必须澄清的是，（1）颗粒-基体相互作用如何影响磁控混合材料的材料行为，以及如何合成合适的材料。材料性质的多尺度模型是（2）理解材料行为的基础，这些行为是在微观水平上解释其磁可控性所必需的。建模也需要建立本构材料的法律，这是需要的应用程序的设计。与这种材料特性的建模密切相关的是（3）材料特性的实验评估及其与微观结构变化的关系。基于对磁性混合材料的这种理解，人们可以回答以下问题：（4）它们在新的活性和感觉应用中提供了什么样的可能性，以及（5）如何通过控制功能化颗粒与组织之间的相互作用来提高磁性纳米颗粒的生物医学用途的有效性。

The use of magnetic fields is an external stimulus for the control of material properties, which is of considerable technical interest, since magnetic fields can easily be generated and controlled. Magnetically controlled materials such as suspensions of magnetic nano- and microparticles - ferrofluids and magneto-rheological fluids - have the ability to exhibit strong changes of material behaviour at reasonable technical effort. In materials formed by a particulate magnetic component in a complex matrix, the mutual influence of particles and matrix provides an additional set of parameters in the material behaviour. This can provide the possibility for a magnetically controlled change of material properties. The knowledge of the interaction between the particles and the surrounding matrix is an important element for the understanding of the material behaviour itself, and thus the basis for a targeted development of such materials for novel applications in actuators and sensors. In the centre, the Priority Programme focusses on five key issues: It must be clarified, how (1) the material behaviour of a magnetically controllable hybrid material is influenced by the particle-matrix interaction and how appropriate materials can be synthesised. A multi-scale modelling of the material properties is (2) the fundament for the understanding of the behaviour of the materials necessary to explain their magnetic controllability at a microscopic level. The modelling is also needed for the establishment of constitutive material laws, which are needed for the design of applications. Closely connected to this modelling of the material properties is (3) the experimental evaluation of the material properties and its connection to changes in the microstructure. Based on this understanding of the magnetic hybrid materials one can answer the question (4) what kind of possibilities they offer in novel actoric and sensory applications, as well as the question (5) how the effectiveness of the biomedical use of magnetic nanoparticles can be improved by a control of the interaction between the functionalised particles and tissue.