Study on the Effect of Particle Size on Viscoelastic Properties of Magnetorheological Elastomers

Abstract

Background: As an intelligent material, Magnetorheological Elastomer (MRE) has attracted extensive attention due to their excellent magnetic-induced properties. Aim: In addition to the matrix and interface, magnetic particle is the most critical factor in the magnetic properties of MRE. Particle size does not only affect on the magnetic properties of MRE, but also affects on interface and particle distribution. Therefore, studying the influence of particle size on viscoelastic properties is of great significance for the MRE. Methods: In this paper, several kinds of MREs containing Carbonyl Iron Particles (CIPs) with different sizes were prepared and characterized. The influences of frequency, strain and magnetic field on viscoelastic properties of these MRE samples have been discussed comprehensively. Results: The result shows that the particle size has a great impact on the performance of MRE, which indicates that the MRE performance can be improved by optimizing the particle size selection. In addition, possible physical mechanisms have been proposed to explain the effect of particles on MRE performance. Conclusion: This work can provide guidance for the performance improvement of MREs.

Effect of Mould Orientation on the Field-Dependent Properties of MR Elastomers under Shear Deformation

“…As for the comparison, the concept of mold that other researchers used in the past for anisotropic curing was reproduced through simulation as shown in Figure 3 [ 2 , 19 , 25 , 26 ]. As observed through FEMM, the mold yielded magnetic flux density of 0.1 T as opposed to the new configuration, where it achieved 0.315 T when same setup (design, number of coil turns, and current input) was applied.…”

“…Magnetorheological elastomer (MRE) has attracted much interest as the material can exhibit a desirable performance owing to the stability of magnetizable particles in a solid-based matrix [ 1 , 2 , 3 , 4 ]. MRE is a polymer composite, which mainly consists of a rubber matrix, magnetic particles as a reinforcement phase, and optional additives for acquiring specific properties such as increased stability and providing much more superior bonding between the matrix and the magnetic particles [ 5 , 6 , 7 , 8 , 9 ].…”

“…Generally, the concept of a curing device that other researchers used in the past for anisotropic curing mostly was made from a non-magnetic materials slab’s mold that was divided into two parts, top and bottom [ 2 , 19 , 25 , 26 ]. The sample was placed in the middle, sandwiched between the upper and bottom mold.…”

Tensile Properties of Isotropic and Anisotropic Magnetorheological Elastomer With and Without Magnetic Field Application

“…In the case of anisotropic MRE, the magnetic particles within the matrix can be reconfigured into various orientations [12]. In previous studies, curing devices for anisotropic treatment were often fabricated using molds consisting of two separate pieces-an upper and a lower portion-created from non-magnetic materials [9], [13]- [15].…”