Nonlinear Magneto-Electro-Mechanical Response of Physical Cross-Linked Magneto-Electric Polymer Gel

Frontiers in Materials

Jun Li¹  Bochao Wang²  Xinglong Gong²  Sheng Wang²  Yu Wang²  Xiwen Fan²  Zhenbang Xu³  Longjiang Shen⁴ 

[1] Anhui Weiwei Rubber Parts Group Co. Ltd., Tongcheng, China;CAS Key Laboratory of Mechanical Behavior and Design of Materials, CAS Center for Excellence in Complex System Mechanics, Department of Modern Mechanics, University of Science and Technology of China, Hefei, China;CAS Key Laboratory of On-orbit Manufacturing and Integration for Space Optics System, Fine Mechanics and Physics, Changchun Institute of Optics, Chinese Academy of Sciences, Changchun, China;Hunan Bogie Engineering Research Center, Zhuzhou, China;

关键词: piezo-resistivity;    carbon nanotubes;    soft sensor;    shear stiffening;    magnetorheological gel;   

DOI  :  10.3389/fmats.2021.665814

来源: DOAJ

【 摘 要 】

This work reports on a novel magnetorheological polymer gel with carbon nanotubes and carbonyl iron particles mixed into the physical cross-linked polymer gel matrix. The resulting composites show unusual nonlinear magneto-electro-mechanical responses. Because of the low matrix viscosity, effective conductive paths formed by the CNTs were mobile and high-performance sensing characteristics were observed. In particular, due to the transient and mutable physical cross-linked bonds in the polymer gel, the electromechanical behavior acted in a rate-dependent manner. External stimulus at a high rate significantly enhanced the electrical resistance response during mechanical deformation. Meanwhile, the rheological properties were regulated by the external magnetic field when magnetic particles were added. This dual enhancement mechanism further contributes to the active control of electromechanical performance. These polymer composites could be adopted as electromechanical sensitive sensors to measure impact and vibration under different frequencies. There is great potential for this magnetorheological polymer gel in the application of intelligent vibration controls.

【 授权许可】

Unknown