Rheological and Resistance Properties of Magnetorheological Elastomer with Cobalt for Sensor Application

Abstract

Cobalt particles have been introduced as a filler due to the advantages of embedding their magnetic and electrical properties in magnetorheological elastomer (MRE). In the present research, the rheology and resistance of MRE are experimentally evaluated. Isotropic and anisotropic MRE samples containing silicone rubber and cobalt particles were fabricated. The magnetic properties of MRE are conducted using a vibrating sample magnetometer (VSM). The morphological aspects of MRE are observed by using field emission scanning electron microscopy (FESEM) and characterized by energy-dispersive X-ray spectroscopy (EDX). Rheological properties under various magnetic field strengths were measured for the magnetic field, strain amplitude, and frequency sweep test by using a parallel-plate rheometer. Subsequently, the resistance of MRE is tested under different applied forces and magnetic fields. The MRE storage modulus depicted an enhancement in field-dependent modulus across all the applied magnetic fields. The electrical resistance generated from the sample can be manipulated by external magnetic fields and mechanical loads. The conductivity of MRE is due to the existence of cobalt arrangements observed by FESEM. By introducing cobalt as filler and obtaining satisfactory results, the study might open new avenues for cobalt to be used as filler in MRE fabrication for future sensing applications.

Hybrid Magnetorheological Composites for Electric and Magnetic Field Sensors and Transducers

“…are largely influenced when exposed to an external magnetic field [ 7 , 8 , 9 ]. In particular, magnetorheological composites (MCs) have attracted an intense research interest, owing to their potential applications in a large number of multi-functional devices, including energy dissipation [ 10 ], vibration absorbing [ 11 ], muscle-like actuators [ 12 ], or sensors [ 13 , 14 , 15 ]. Recently, the application of MCs as sensors and transducers has become a hot research topic [ 16 , 17 , 18 , 19 ] due to their high socio-economic impact and the rapid development of various fabrication methods, including three-dimensional (3D) printing [ 20 , 21 , 22 ] or magnetorheological drawing lithography [ 23 ].…”

Pressure sensing properties for the dielectric layer of graphene/silicone rubber‐based magnetorheological elastomer

“…1,2 Early research on MREs mainly focused on mechanical properties, but in recent years researchers have begun to focus on their electrical properties. Research on the electrical properties of MREs started from their electrical conductivity [3][4][5][6] and then turned to the conductivity mechanism. 7,8 In order to expand the field of application of MREs, researchers began to focus on their dielectric properties.…”

Effect of Volume Fraction on Shear Mode Properties of Fe-Co and Fe-Ni Filled Magneto-Rheological Elastomers

“…Ni and cobalt are ferromagnetic materials which, unlike iron, do not easily oxidize and have corrosion resistance [ 52 , 53 ]. They are also used in MREs for their good electrical properties [ 43 , 54 ]. There is considerable literature highlighting their use in MRE in pure form and in the form of their ferrites [ 43 , 54 , 55 , 56 ].…”

“…They are also used in MREs for their good electrical properties [ 43 , 54 ]. There is considerable literature highlighting their use in MRE in pure form and in the form of their ferrites [ 43 , 54 , 55 , 56 ]. However, usually, MREs with cobalt and nickel have relatively less MR effect so in order to enhance the magnetic properties of MRE the addition of iron particles along with nickel or cobalt particles is proposed in this study.…”