Experimental Investigation on the Effect of Graphene Oxide Additive on the Steady-State and Dynamic Shear Properties of PDMS-Based Magnetorheological Elastomer

Liu, Minzi; Zhang, Mei; Zhang, Jiangtao; Qiao, Yanliang; Zhai, Pengcheng

doi:10.3390/polym13111777

Cited by 7 publications

(9 citation statements)

References 52 publications

(136 reference statements)

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“…The proposed hMRE is composed of an extremely soft elastomer for the continuous phase (carrier matrix) and hard-magnetic powder for the discontinuous phase (magnetic fillers). In the literature, extremely soft PDMS matrices have been scarcely used [24,49,44,31]. In this work, the extremely soft elastomer Dowsil CY52-276 (DowSil, Midland, MI, USA) (PDMS) (stiffness below 10 kPa) was chosen to achieve magnetorheological stiffening and shape changes with small external magnetic fields.…”

Section: Materials and Synthesismentioning

confidence: 99%

Effects of soft and hard magnetic particles on the mechanical performance of ultra-soft magnetorheological elastomers

Moreno-Mateos

López-Donaire

Hossain

et al. 2022

Smart Mater. Struct.

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Magnetorheological elastomers (MREs) mechanically respond to external magnetic stimuli by changing their mechanical properties and/or changing their shape. Recent studies have shown the great potential of MREs when manufactured with an extremely soft matrix and soft-magnetic particles. Under the application of an external magnetic field, such MREs present significant mechanical stiffening, and when the magnetic field is off, they show a softer response, being these alternative states fully reversible. Although soft-magnetic particles are suitable for their high magnetic susceptibility, they require the magnetic actuation to remain constant in order to achieve the magneto-mechanical stiffening. Here, we present an alternative solution based on hard-magnetic MREs to provide stiffening responses that can be sustained along time without the need of keeping the external magnetic field on. To this end, we manufacture novel extremely soft hard-magnetic MREs (stiffness in the order of 1~kPa) and characterise them under magneto-mechanical shear and confined magnetic expansion deformation modes, providing a comparison framework with the soft-magnetic counterparts. The extremely soft nature of the matrix allows for easily activating the magneto-mechanical couplings under external magnetic actuation. In this regard, we provide a novel approach by setting the magnetic actuation below the fully magnetic saturating field. In addition, free deformation tests provide hints on the microstructural transmission of torques from the hard-magnetic particles to the viscoelastic carrier matrix, resulting in macroscopic geometrical effects and complex functional morphological changes.

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Section: Materials and Synthesismentioning

confidence: 99%

Effects of soft and hard magnetic particles on the mechanical performance of ultra-soft magnetorheological elastomers

Moreno-Mateos

López-Donaire

Hossain

et al. 2022

Smart Mater. Struct.

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“…Shi Guanxi et al compared the mechanical properties of MREs with different types of matrices. The results show that the matrix material has a great influence on the zero-field modulus of the MREs, and the silicone rubber-based MREs has the highest magnetorheological effect [13][14][15][16]. To sum up,many scholars have carried out abundant experimental studies on the macroscopic magnetostrictive properties of MREs.…”

Section: Introductionmentioning

confidence: 99%

Coupled multi-physics field simulation research of magneto-rheological elastomeric magneto-shear mechanical properties based on COMSOL

et al. 2023

International Conference on Optical Technology, Semiconductor Materials, and Devices (OTSMD 2022)

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Magnetorheological elastomers (MREs) are a new type of intelligent magnetically controlled material consisting of a polymer matrix and magnetic particles. The modulus of elasticity of MREs varies with the external magnetic field strength due to the electromagnetic stress between the internal magnetic particle. However, the weak magnetoenological effect of MREs limits their development. In order to improve the performance of the MREs, a two-dimensional model of MREs is developed based on the equivalent volume cell method, and the force-magnetic coupling analysis is carried out with COMSOL. In this paper, the effects of volume fraction, particle distribution, and magnetic field strength on the magnetostatic shear mechanical properties of MREs were investigated. The results show that: the stress distribution inside of MREs is mainly concentrated on the particles and the contact position between the particles and air. Increasing the magnetic field and the magnetic particle content can effectively improve the magneto-mechanical properties of MREs. Increasing the magnetic field from 0.5T to 1.7T, the magnetic shear modulus was increased by 8.81%. Increasing the particle volume fraction from 15% to 60%, the magnetic shear modulus was increased by 313.64%. Decreasing the particle distance in the chain contribute to the magneto-mechanical properties enhancement.

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“…The works revealed that the MR effect of the MREs filled with additives was controlled by two opposite factors. The first is the physical reinforcement effect of the additives, leading to the improved zero-field modulus and reduced MR effect of MREs [19][20][21][22]. The second is the inhibited chemical crosslinking reactions of the polymer chains owing to the physical cross-linking between the polymer chains and the additives, then resulting in the softened matrix and improved MR effect [19,23,24].…”

Section: Introductionmentioning

confidence: 99%

“…The first is the physical reinforcement effect of the additives, leading to the improved zero-field modulus and reduced MR effect of MREs [19][20][21][22]. The second is the inhibited chemical crosslinking reactions of the polymer chains owing to the physical cross-linking between the polymer chains and the additives, then resulting in the softened matrix and improved MR effect [19,23,24]. Tian et al [20,22] found that the addition of Gr microparticles in silicone rubber (SR) based MREs resulted in a decreased relative MR effect owing to the increased zero-field modulus.…”

Section: Introductionmentioning

confidence: 99%

Magnetorheological effect and sensing performance of graphite sheet filled PDMS based magnetorheological elastomer under compression

Qin,

Zhang,

Guo

et al. 2023

Smart Mater. Struct.

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In order to study the effect of large-sized graphite (Gr) sheet on the magnetorheological (MR) effect and sensing characteristics of MR elastomer (MRE), isotropic and anisotropic Gr-filled MRE samples with different carbonyl iron powder (CIP) contents were fabricated. The effect of Gr sheet on the microstructure, MR effect and sensing characteristics of the MRE samples were experimentally tested, and the mechanisms behind discussed. The results show that in the anisotropic MRE samples, the addition of Gr sheets results in the short particle chains formed between Gr sheets, thus leading to the high MR effect and low resistivity than those of isotropic counterparts. The non-monotonic resistivity responses of the Gr-filled MRE samples during compression were observed owing to the interlayer separation of Gr sheets and the reconstruction of conductive network. A higher piezoresistive response was observed from the isotropic Gr-filled MRE sample filled with the CIP content below the percolation threshold. The resistivities of the Gr-filled MRE samples decline with increasing the applied magnetic field. The isotropic sample filled with lower CIP content shows the higher magnetoresistive effect from the view point of absolute change in resistivity. While for the relative change in resistivity, the anisotropic sample filled with the higher CIP content has the higher magnetoresistive effect.

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Experimental Investigation on the Effect of Graphene Oxide Additive on the Steady-State and Dynamic Shear Properties of PDMS-Based Magnetorheological Elastomer

Cited by 7 publications

References 52 publications

Effects of soft and hard magnetic particles on the mechanical performance of ultra-soft magnetorheological elastomers

Effects of soft and hard magnetic particles on the mechanical performance of ultra-soft magnetorheological elastomers

Coupled multi-physics field simulation research of magneto-rheological elastomeric magneto-shear mechanical properties based on COMSOL

Magnetorheological effect and sensing performance of graphite sheet filled PDMS based magnetorheological elastomer under compression

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