Magnetodielectric effect in magnetoactive elastomers: Transient response and hysteresis

Belyaeva, Inna A.; Kramarenko, Elena Yu.; Shamonin, Mikhail

doi:10.1016/j.polymer.2017.08.056

Cited by 53 publications

(61 citation statements)

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“…Preparation of polydimethylsiloxane-based elastomer material filled with φm = 70 wt% of carbonyl iron powder (CIP) was performed as reported elsewhere [23,40]. CIP (type SQ, mean diameter of The polymer VS 100000, the polymer MV 2000, the modifier 715 and the silicone oil AK 10 were put together and blended with an electric mixer (Roti ®-Speed-stirrer, Carl Roth GmbH, Germany) to form an initial compound.…”

Section: Sample Preparationmentioning

confidence: 99%

Temperature-dependent magnetic properties of a magnetoactive elastomer: Immobilization of the soft-magnetic filler

Боднарук

Brunhuber

Каліта

et al. 2018

Journal of Applied Physics

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Magnetic properties of a magnetoactive elastomer (MAE) filled with µm-sized soft-magnetic iron particles have been experimentally studied in the temperature range between 150 K and 310 K. By changing the temperature, the elastic modulus of the elastomer matrix was modified and it was possible to obtain magnetization curves for an invariable arrangement of particles in the sample as well as in the case when the particles were able to change their position within the MAE under the influence of magnetic forces. At low (less than 220 K) temperatures, when the matrix becomes rigid, the magnetization of the MAE does not show a hysteresis behavior and it is characterized by a negative value of the Rayleigh constant. At room temperature, when the polymer matrix is compliant, a magnetic hysteresis exists and exhibits local maxima of the field dependence of the differential magnetic susceptibility. The appearance of these maxima is explained by the elastic resistance of the matrix to the displacement of particles under the action of magnetic forces.

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Section: Sample Preparationmentioning

confidence: 99%

Temperature-dependent magnetic properties of a magnetoactive elastomer: Immobilization of the soft-magnetic filler

Боднарук

Brunhuber

Каліта

et al. 2018

Journal of Applied Physics

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“…Although the magnetic reaction for magnetorheological fluids takes place within 20 ms, the mechanical reaction can be twice this . Magnetoactive polymers are magnetoelastic so the change can take up to several seconds . Furthermore, organo‐silicon oxide materials are rheopectic so the matrix resists rapid CIP displacement but allows slow creep and relaxation.…”

Section: Measurement Resultsmentioning

confidence: 99%

“…[27] Magnetoactive polymers are magnetoelastic so the change can take up to several seconds. [15] Furthermore, organo-silicon oxide materials are rheopectic so the matrix resists rapid CIP displacement but allows slow creep and relaxation. This latter is almost certainly due to the rheopectic properties of boron-organo-silicon oxide resulting in a slower response at high magnetic flux densities.…”

Section: Measurement Resultsmentioning

confidence: 99%

“…Interfacial magnetocapacitance often quoted as “magnetodielectric effect” (sic), complex impedance, etc. have all been evaluated for different magnetic content under various ranges of applied magnetic field . However, a magnetoactive elastomer with a CIP concentration of 73%, subject to an applied magnetic field strength of 700 000 A m −1 , exhibits little more than a 60% increase in capacitance …”

Section: Magnetoactive Polymersmentioning

confidence: 99%

“…have all been evaluated for different magnetic content under various ranges of applied magnetic field. [13][14][15] However, a magnetoactive elastomer with a CIP concentration of 73%, subject to an applied magnetic field strength of 700 000 A m −1 , exhibits little more than a 60% increase in capacitance. [16] Where the particles are not constrained by an elastic matrix but allowed to migrate in a viscoelastic medium, dramatic effects on the electrical capacitance and resistance become clearly observable.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electrical Properties of Magnetoactive Boron‐Organo‐Silicon Oxide Polymers

Monkman

Striegl

Prem

et al. 2020

Macro Chemistry & Physics

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The electrical properties of rheopectic magnetoactive composites comprising boron‐organo‐silicon oxide dielectric matrices containing carbonyl iron microparticles are presented for the first time. The increase in interfacial magnetocapacitance is seen to greatly exceed that experienced when using conventional elastomeric matrices such as polydimethylsiloxane. In addition to the increase in capacitance, a simultaneous and sharp decrease in the parallel electrical resistance over several orders of magnitude is also observed. The effects are time dependent but repeatable. Potential applications include magnetically controlled frequency dependent devices, magnetic sensor systems, weighting elements for neural networks, etc.

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Tunable Drop Splashing on Magnetoactive Elastomers

Kravanja

Belyaeva

Hribar

et al. 2021

Adv Materials Inter

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The significant effect of an external dc magnetic field on the splashing behavior of ethanol drops impacting on the unstructured (flat) surface of soft magnetoactive elastomers (MAEs) is reported. The Weber number corresponding to the transition between the deposition and the splashing regime is reduced by ≈20% in a moderate magnetic field of ≈300 mT. Alongside this effect, a two‐fold increase of the initial deceleration of the ejection sheet is observed for the softest sample. The main underlying mechanism for the observed phenomena is believed to be the magnetic‐field‐induced stiffening of the MAEs. Further possible mechanisms are magnetically induced changes in the surface roughness and magnetic‐field‐induced plasticity (magnetic shape memory effect). The potential application areas are magnetically regulable wetting and magneto‐responsive surfaces for controlling the drop splashing.

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Magnetodielectric effect in magnetoactive elastomers: Transient response and hysteresis

Cited by 53 publications

References 50 publications

Temperature-dependent magnetic properties of a magnetoactive elastomer: Immobilization of the soft-magnetic filler

Temperature-dependent magnetic properties of a magnetoactive elastomer: Immobilization of the soft-magnetic filler

Electrical Properties of Magnetoactive Boron‐Organo‐Silicon Oxide Polymers

Tunable Drop Splashing on Magnetoactive Elastomers

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