Vaganov Mikhail V, Borin Dmitry Yu, Odenbach Stefan, Raikher Yuriy L
Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UK.
Chair of Magnetofluiddynamics, Measuring and Automation Technology, Institute of Mechatronic Engineering, TU Dresden, Dresden 01069, Germany.
Soft Matter. 2022 Jun 29;18(25):4667-4678. doi: 10.1039/d2sm00520d.
In this work we study the magnetization of magnetoactive elastomers (MAE) in which the interface between the matrix and magnetic particles is unstable and allows for slipping of the particles against the wall of their elastomer cavities. The estimate of the maximal angle at which each particle can decline its axis from the initial position is made based on cyclic measurement of several consecutive hysteresis loops at different maximal magnetic fields. A model of magnetization of magnetically hard multigrain particles in an elastic environment with allowance for their possible slipping is proposed. Results of modelling is in fair agreement with the experimental data obtained on MAEs whose polymeric matrix is made of polydimethylsiloxane and the magnetic filler is NdFeB spherical particles.
在这项工作中，我们研究了磁活性弹性体（MAE）的磁化情况，其中基体与磁性颗粒之间的界面不稳定，使得颗粒能够在其弹性体腔壁上滑动。基于在不同最大磁场下对几个连续磁滞回线的循环测量，对每个颗粒的轴从初始位置倾斜的最大角度进行了估计。提出了一种考虑磁性硬多晶颗粒在弹性环境中可能滑动的磁化模型。建模结果与在聚合物基体由聚二甲基硅氧烷制成且磁性填料为钕铁硼球形颗粒的MAE上获得的实验数据相当吻合。
