Macroscopic aspects of field-controlled particle-matrix interactions in magnetorheological elastomers and in liquid crystalline magnetic gels

本研究计划的目的是分析两类磁系统的宏观和流变特性，其中粒子基质相互作用起重要作用。然后将结果应用于具体问题。一方面，我们将研究液晶磁性凝胶的相变和流体力学性质。另一方面，我们将研究磁场下磁流变流体向磁流变凝胶的转变。在所有选择用于分析两者的系统中，永久网络的性质以及瞬态网络的形成都起着重要作用。利用磁场可以影响和控制暂态网络的形成。宏观上的非守恒应变场和不同子系统之间的相对旋转，除了具有磁性和取向自由度的宏观变量外，还将发挥作用。

The aim of this research proposal is to analyze the macroscopic and rheological properties of two classes of magnetic systems for which particle matrix interactions play an important role. The results are then applied to concrete problems. On the one hand we will study the phase transitions and the hydrodynamic properties of a liquid crystalline magnetic gel. On the other hand we will investigate the transition magnetorheological fluids to magnetorheological gels in external fields. In all systems chosen for analysis both, the properties of a permanent network as well as the formation of a transient network, play an important role. The formation of a transient network can be influenced and controlled by using magnetic fields. Macroscopically nonconserved strain fields and relative rotations between the different subsystems will come into play, in addition to the macroscopic variables, which are characteristic for magnetic and orientational degrees of freedom.