Characterization of the linear viscoelastic region of magnetorheological elastomers

Agirre-Olabide, Iker; Berasategui, Joanes; Elejabarrieta, María Jesús; Bou-Ali, M. Mounir

doi:10.1177/1045389x13517310

Cited by 66 publications

(50 citation statements)

References 19 publications

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“…11. Usually, the LVE range can be regarded as the region of the dynamic properties remain unchanged with the increasing of strain amplitude [36]. As can be seen from Fig.…”

Section: Dynamic Properties Under Oscillatory Shear Rheometrymentioning

confidence: 99%

Improved rheological properties of dimorphic magnetorheological gels based on flower-like carbonyl iron particles

Yang

Luo

et al. 2017

Applied Surface Science

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“…11. Usually, the LVE range can be regarded as the region of the dynamic properties remain unchanged with the increasing of strain amplitude [36]. As can be seen from Fig.…”

Section: Dynamic Properties Under Oscillatory Shear Rheometrymentioning

confidence: 99%

Improved rheological properties of dimorphic magnetorheological gels based on flower-like carbonyl iron particles

Yang

Luo

et al. 2017

Applied Surface Science

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“…The samples were subjected to torsional deformation generated by a periodic oscillatory rotation of the upper rheometer plate. A strain amplitude of 0.01% was used in the frequency sweep tests to guarantee that all tests were performed in the linear viscoelastic (LVE) region [28,29]. The frequency range of 0.1-40 Hz was analysed and divided into two steps; the first one from 0.1 to 10 Hz, and the second one from 10 to 40 Hz.…”

Section: 2mentioning

confidence: 99%

Linear magneto-viscoelastic model based on magnetic permeability components for anisotropic magnetorheological elastomers

Agirre-Olabide¹,

Kuzhir²,

Elejabarrieta³

2018

Journal of Magnetism and Magnetic Materials

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International audienceThe storage modulus variation of anisotropic magnetorheological elastomers (MREs) induced by an external magnetic field was modelled in the frequency domain. This involves synthesising five anisotropic MREs with different particle content and measuring its dynamic and magnetic properties. Dynamic properties were measured using a rheometer equipped with a magnetorheological cell and the magnetic permeability of each sample was measured with a vibrating sample magnetometer. Scanning Electron Microscope images were used to determine particle distribution. A four parameter fractional derivative model was used to describe MRE viscoelasticity in the absence of magnetic field and the fitting error was not larger than 1%. Magneto-induced modulus was also studied and two different models were analysed, the one of Jolly et al. (Smart Mater Struct;5:607 (1999)) and the other one of López-López et al. (J Rheol. 56:1209 (2012)). The first model underestimated the influence of the magnetic field for low particle contents while at high ones it overestimated the magnetic field effect, up to 13%. However, in the second model magnetic permeability values were used, and the error between the model prediction and experimental data did not exceed 7%. Hence, a new linear magneto-viscoelastic model was proposed in frequency domain for anisotropic MREs based on López-López et al. model, which predicts the effect of magnetic field on the dynamic shear modulus in function of particle content and frequency

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“…In the second group (magneto-polymers), the magnetic particles can be dispersed in a highly elastic (and dry) polymer network, that is an elastomer, as, for example, synthetic rubber. In magnetic elastomers, the mechanical properties (Young and shear moduli) can be strongly modulated by applying external magnetic fields [3,4]. Alternatively, the continuous phase can be a soft viscoelastic gel consisting of polymer chains extended across oil or aqueous solution [2,5].…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of magnetic gels containing rod-like composite particles

Abrougui

López–López

Durán

2019

Phil. Trans. R. Soc. A.

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Magnetic gels (ferrogels) are heterogeneous systems structured at the nanoscale that contains magnetic particles dispersed in three-dimensional networks of polymer chains. In the present work, the magnetic particles were synthesized with a core–shell structure, consisting of sepiolite particles covered by magnetite nanoparticles. These composite particles had a rod-like shape with a high aspect ratio. The obtained sepiolite–magnetite particles showed a high enough susceptibility and saturation magnetization. The magneto-rheological (MR) properties, and the intensity of the MR effect, of aqueous suspensions of the synthesized particles were studied. The particles, functionalized by adsorption of alginate molecules, were imbedded in alginate hydrogels to get homogeneous soft materials. The particles were linked to the polymer chains as the knots in a network and dominated in a great extent the mechanical properties of the materials. After determining the optimal compositions of the ferrogels, their viscoelastic properties were measured in the absence/presence of magnetic fields. The results pointed out that the MR effect provided by the clay–magnetite particles was considerably more intense than those achieved in ferrogels that contain spherical magnetic microparticles. Therefore, the imbedding of rod-shaped magnetic particles in hydrogels allows controlling the mechanical properties in a wider range than in conventional ferrogels. This article is part of the theme issue ‘Heterogeneous materials: metastable and non-ergodic internal structures’.

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Characterization of the linear viscoelastic region of magnetorheological elastomers

Cited by 66 publications

References 19 publications

Improved rheological properties of dimorphic magnetorheological gels based on flower-like carbonyl iron particles

Improved rheological properties of dimorphic magnetorheological gels based on flower-like carbonyl iron particles

Linear magneto-viscoelastic model based on magnetic permeability components for anisotropic magnetorheological elastomers

Mechanical properties of magnetic gels containing rod-like composite particles

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