Anisotropic behaviour analysis of silicone/carbonyl iron particles magnetorheological elastomers

Berasategi, Joanes; Salazar, Daniel; Gómez, Ainara; Gutiérrez, J.; Sebastián, María San; Bou-Ali, M. Mounir; Barandiarán, J.M.

doi:10.1007/s00397-020-01218-4

Cited by 30 publications

(24 citation statements)

References 23 publications

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Section: Methodsmentioning

confidence: 99%

“…The choice of the range of filler content in the composition of MAE samples was based on the results of studies of the dependence of the relative (dielectric) permittivity and magnetic pressure (attraction of the tube walls) distribution (Figure 1a,b) [18][19][20][21]. Samples with concentrations above 70% cause difficulty to ensure homogeneous distribution of filler particles in the polymerization step because of the rapid sedimentation of the filler particles.…”

Section: Elastomer Materialsmentioning

confidence: 99%

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Research on Dynamic and Mechanical Properties of Magnetoactive Elastomers with High Permeability Magnetic Filling Agent at Complex Magneto-Temperature Exposure

2021

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We consider magnetically active elastomer as a potentially applicable material for manufacturing a working channel of a magnetic pump unit. During the study, the samples were exposed to a magnetic field, a temperature field, and their combination to assess the change in the elastic-strength properties of the final material. For the preparation of samples, high permeability magnetic fillers of various sizes were used in the concentration range of 50–70%. Samples were made with an isotropic and an anisotropic structure. Studies have shown that when using a filler with a relatively coarse fraction, the material has more stable dynamic and mechanical characteristics: the tensile strength of the sample increases by an average of 38%. With the combined effect of magnetic and temperature fields on the material, its elasticity and strength increase by an average of 30% in comparison with the material without external influence. Based on the results obtained, the composition and structural organization of the material, which has the best complex of elastic strength characteristics, has been substantiated. For the manufacture of a pumping unit tube, it is preferable to use an isotropic magnetoactive elastomer with a coarser filler content of about 60%.

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Section: Methodsmentioning

confidence: 99%

Section: Elastomer Materialsmentioning

confidence: 99%

Research on Dynamic and Mechanical Properties of Magnetoactive Elastomers with High Permeability Magnetic Filling Agent at Complex Magneto-Temperature Exposure

2021

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“…This specific type of characterization can be found in the literature. [ 33,75–77 ] The determination of the magnetic remanence of the composites is important from an applicability point of view, since the capacity of the MRE to change between different states strongly depends on the remanence of the magnetic filler. If the remanence is too high, the elastomer will not recover its original state once the magnetic field is removed, thus reducing their possible applications.…”

Section: Materials Processing and Functional Responsementioning

confidence: 99%

“…[ 81 ] SR‐based MREs with CIPs as magnetic fillers are by far the most common type of elastomer that has been produced. [ 33,82–84 ] For instance, membranes based on MREs were synthesized by using SR, SO, CIPs (sized between 4.5 and 5.4 μm of diameter), and graphene nanoparticles. [ 85 ] In many cases, these MREs were fabricated to be used as dielectric components for capacitors, deposited on a cotton fabric ( Figure a).…”

Section: Materials Processing and Functional Responsementioning

confidence: 99%

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Magnetorheological Elastomer‐Based Materials and Devices: State of the Art and Future Perspectives

et al. 2021

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Magnetorheological elastomers based on the combination of a polymeric matrix with magnetic fillers allow the possibility of controlling their mechanical properties when an external magnetic field is applied. This so‐called magnetorheological effect can be exploited for a variety of applications. Herein, a comprehensive outlook at the state of the art is provided, in terms of the materials, effects, and applications. The physical effects that result in the magnetorheological effect are described, both from a micro and phenomenological points of view. Then, the possible combinations of different polymeric matrices and magnetic fillers, along with other additives, are presented, allowing to tune the mechanical properties, mainly dependent on the polymer matrix, and the magnetic field response, which is related to the magnetic filler. Finally, representative applications of magnetorheological elastomers are presented. This review represents an up‐to‐date state‐of‐the‐art in the field of magnetorheological elastomers as a ground to highlight the main achievements and point the specific needs to improve their response and applicability by further tuning materials and configurations.

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Synthesis and Characterization of Highly Deformable Multilayer Magnetoactive Elastomers with Magnetically Soft Particles

et al. 2023

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Herein, a new highly deformable magnetoactive elastomeric material is developed. The elastomer is composed of a silicon‐based matrix and soft‐magnetic Fe microparticles. It presents a nonuniform multilayer internal structure, with highest particle concentration in one‐half of the thickness. These elastomers are produced in sheet and tubular formats, wherein multilayer distribution of the components is achieved by the gravitational and centrifugal force respectively. The study of the rheological properties shows a high change in the dynamic modulus of the elastomer in the presence of magnetic field, which is representative of a high magnetorheological effect. Regarding the deformability of the elastomer, to monitor the displacements and curvatures generated under the action of a magnetic field, an optical, noninvasive, and magnetic field‐insensitive system based on 3D stereoscopic technique is employed. Using this method, the digitization of the upper curved surface of the elastomer as a function of the applied magnetic field is obtained. From the digitized surfaces, the deformation of the material in response to a magnetic field is calculated, reaching deformations up to 23.7% at 207 kA m−1. Moreover, the deformation level is linearly variable and controllable by the strength of the applied magnetic field, allowing dynamic deformation of the material.

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Anisotropic behaviour analysis of silicone/carbonyl iron particles magnetorheological elastomers

Cited by 30 publications

References 23 publications

Research on Dynamic and Mechanical Properties of Magnetoactive Elastomers with High Permeability Magnetic Filling Agent at Complex Magneto-Temperature Exposure

Research on Dynamic and Mechanical Properties of Magnetoactive Elastomers with High Permeability Magnetic Filling Agent at Complex Magneto-Temperature Exposure

Magnetorheological Elastomer‐Based Materials and Devices: State of the Art and Future Perspectives

Synthesis and Characterization of Highly Deformable Multilayer Magnetoactive Elastomers with Magnetically Soft Particles

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