Magnetism and viscoelasticity of magnetic elastomers with wide range modulation of dynamic modulus

Mitsumata, Tetsu; Ohori, Suguru; Honda, Atomu; Kawai, Mika

doi:10.1039/c2sm26717a

Cited by 62 publications

(50 citation statements)

References 17 publications

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“…In practical, it is represented by a) Change modulus as function of strain amplitude; flux density; frequency excitation, and filler volume fraction [40,47,49,98,99,164,179,258] the ratio of change of modulus (Young modulus and shear modulus) with off-state modulus. [146,147,255] The main influencing factor of MR effect is the response of MREs due to the external magnetic field. This means that the attractive force within particle will often make positive sign in MR effect.…”

Section: Experimental Approachmentioning

confidence: 99%

Recent Progress on Magnetorheological Solids: Materials, Fabrication, Testing, and Applications

et al. 2014

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Magnetorheological (MR) materials are classified as smart materials due to their responsiveness to external magnetic stimuli. Intensive research on MR materials has led to broad applications in several potential fields. A solid carrier matrix state called MR elastomer with its exceptional magnetic responsive feature is obtained by merging magnetizable particles within an elastomeric polymer. This integration results in outstanding characteristics on the rheological performances. Special prominence is given to the understanding of the base materials and fabrication as well as the functional behavior through various characterization methods. Broad applications of MREs are also explored to provide a profound market picture and to motivate researchers to develop novel technology.

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Section: Experimental Approachmentioning

confidence: 99%

Recent Progress on Magnetorheological Solids: Materials, Fabrication, Testing, and Applications

et al. 2014

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“…In this paper we adapt magnetorheological gels [39] and elastomers [40,41] into a magnetically tunable hydrogel platform for cell culture. We modify carbonyl iron (CI) particles for incorporation into polyacrylamide hydrogels and we demonstrate over two orders of magnitude shift in hydrogel compliance in response to magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

Temporal Modulation of Stem Cell Activity Using Magnetoactive Hydrogels

Abdeen

Lee

Bharadwaj

et al. 2016

Adv Healthcare Materials

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Cell activity is coordinated by dynamic interactions with the extracellular matrix, often through stimuli-mediated spatiotemporal stiffening and softening. Dynamic changes in mechanics occur in vivo through enzymatic or chemical means, processes which are challenging to reconstruct in cell culture materials. Here we present a magnetoactive hydrogel material formed by embedding magnetic particles in a hydrogel matrix whereby elasticity can be modulated reversibly by attenuation of a magnetic field. We show orders of magnitude change in elasticity using low magnetic fields and demonstrate reversibility of stiffening with simple permanent magnets. The broad applicability of this technique is demonstrated with two therapeutically relevant bioactivities in mesenchymal stem cells: secretion of proangiogenic molecules, and dynamic control of osteogenesis. The ability to reversibly stiffen cell culture materials across the full spectrum of soft tissue mechanics, using simple materials and commercially available permanent magnets, will make this approach viable for a broad range of laboratory environments.

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“…In the small strain regime, this corresponds to a relative magnetic permeability μ r ≈10. This is somewhat greater than that typically measured in magneto‐active polymers but necessary to induce large displacements in this example problem. The material was made quasi‐incompressible by choosing ν = 0.4999.…”

Section: Numerical Examplesmentioning

confidence: 62%

Computational electro‐elasticity and magneto‐elasticity for quasi‐incompressible media immersed in free space

Pelteret

Davydov

McBride

et al. 2016

Numerical Meth Engineering

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(2016) Computational electro-and magneto-elasticity for quasi-incompressible media immersed in free space. International Journal for Numerical Methods in Engineering, 108(11), pp. 1307-1342.There may be differences between this version and the published version. You are advised to consult the publisher's version if you wish to cite from it. This is the peer reviewed version of the following article: Pelteret, J. SUMMARYIn this work a mixed variational formulation to simulate quasi-incompressible electro-or magnetoactive polymers immersed in the surrounding free space is presented. A novel domain decomposition is used to disconnect the primary coupled problem and the arbitrary free space mesh update problem. Exploiting this decomposition we describe a block iterative approach to solving the linearised multiphysics problem, and a physically and geometrically based, three-parameter method to update the free space mesh. Several application-driven example problems are implemented to demonstrate the robustness of the mixed formulation for both electro-elastic and magneto-elastic problems involving both finite deformations and quasi-incompressible media.

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Magnetism and viscoelasticity of magnetic elastomers with wide range modulation of dynamic modulus

Cited by 62 publications

References 17 publications

Recent Progress on Magnetorheological Solids: Materials, Fabrication, Testing, and Applications

Recent Progress on Magnetorheological Solids: Materials, Fabrication, Testing, and Applications

Temporal Modulation of Stem Cell Activity Using Magnetoactive Hydrogels

Computational electro‐elasticity and magneto‐elasticity for quasi‐incompressible media immersed in free space

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