Mechanics of Magnetopolymer Composites: A Review

López–López, Modesto T.; Durán, J.D.G.; Iskakova, L. Yu.; Zubarev, A. Yu.

doi:10.1166/jon.2016.1233

Cited by 74 publications

(64 citation statements)

References 66 publications

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“…[5][6][7][8] These composite materials are dispersions of micrometer-sized ferromagnetic particles embedded in a soft elastomer matrix. 5,[9][10][11][12][13][14][15] They are distinguished by large modulation of their physical properties (elastic moduli, magneto-mechanical effects, electric properties etc.) in response to external magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

Tunable surface roughness and wettability of a soft magnetoactive elastomer

Glavan

Szűcs

Belyaeva

et al. 2018

J of Applied Polymer Sci

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Surface topographical modifications of a soft magnetoactive elastomer (MAE) in response to variable applied magnetic field are investigated. The analysis is performed insitu and is based on optical microscopy, spread optical reflection and optical profilometry measurements. Optical profilometry analysis shows that the sensitivity of magnetic fieldinduced surface roughness with respect to external magnetic field is in the range of 1 µm/T. A significant hysteresis of surface modifications takes place for increasing and decreasing fields. Investigations of shape of sessile water droplets deposited on the MAE surface reveal that field-induced topographical modifications affect the contact angle of water at the surface. This effect is reversible and the sensitivity to magnetic field is in the range of 20/T.

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Section: Introductionmentioning

confidence: 99%

Tunable surface roughness and wettability of a soft magnetoactive elastomer

Glavan

Szűcs

Belyaeva

et al. 2018

J of Applied Polymer Sci

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“…In the external magnetic field, the MAEs demonstrate a considerable MR effect . Magnetized iron particles start to interact, this interaction results in an increase of the both components of the dynamic modulus of the material.…”

Section: Resultsmentioning

confidence: 99%

“…Combination of polymer elasticity and ferromagnetic properties within a single magnetopolymer composite material has recently led to the appearance of a new kind of smart materials, able to respond to external magnetic fields by huge controllable variations of a number of their physical properties . In particular, tremendous changes in mechanical, viscoelastic, dielectric, magnetic, and some other characteristics of these composites have been reported starting from their first development in the end of the 20th century (a review of the recent advances in the field is given in Ref.…”

Section: Introductionmentioning

confidence: 99%

Development of magnetoactive elastomers for sealing eye retina detachments

Alekhina

Makarova

Kostrov

et al. 2018

J of Applied Polymer Sci

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Magnetoactive elastomers (MAEs) on the basis of a silicone matrix filled with carbonyl iron microparticles are developed for an envisaged application in eye surgery for treatment of complicated retinal detachments. The proposed magnetic fixator of an eye retina consists of an MAE seal placed inside an eye in the area of a retinal break, and an external silicone sponge with embedded permanent magnets which can be sutured to the sclera to provide magnetic field acting on the internal MAE seal. For MAE seal development, MAEs of various compositions (containing 52-76 mass% of ferromagnetic iron microparticles) are synthesized and their surface, magnetic, mechanical, and rheological properties are investigated in external magnetic fields. To demonstrate MAEs efficacy as an element of the retina magnetic fixator, magnetic forces acting between MAE samples and systems of permanent magnets were measured in the curved configuration corresponding to the human eye geometry. It has been demonstrated that the pressure produced within the fixator can be varied in a wide range by tuning the MAE composition and MAE seal dimensions as well as by optimizing the size and configuration of permanent magnets within the external silicone sponge.A high magnetic response of MAEs makes them very promising for numerous practical applications. Being a solid analogue to magnetic fluids 20 MAEs can be explored in the areas where magnetic fluids are usually used, in particular, as sealing elements, vibration absorbers, and so forth. Moreover, MAEs have some advantages in comparison with magnetic fluids, in particular, Additional Supporting Information may be found in the online version of this article.

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“…Equation (22) Fig. 4 were obtained by solving the system of equations (9) -(11) for the linear problem, while the curved lines (dash-dotted curves) correspond to the exact solutions of equations (4) - (6). It is seen that the linear approximation provides reasonable solution for a sufficiently broad range of inclination angles.…”

Section: B Highly Anisotropic Particles In Saturating Magnetic Fieldsmentioning

confidence: 97%

“…Equation (6) is obtained by differentiation over the shear strain. From equation (6) it follows that the magnitude of the shear stress is equal to the sum of the contributions caused by the shear deformation and an additional contribution to the strain created in the matrix by the rotation of particles in a magnetic field.…”

Section: Magnetic Fieldmentioning

confidence: 99%

Effect of single-particle magnetostriction on the shear modulus of compliant magnetoactive elastomers

et al. 2017

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The influence of an external magnetic field on the static shear strain and the effective shear modulus of a magnetoactive elastomer (MAE) is studied theoretically in the framework of a recently introduced approach to the single-particle magnetostriction mechanism [V. M. Kalita et al., Phys. Rev. E 93, 062503 (2016)10.1103/PhysRevE.93.062503]. The planar problem of magnetostriction in an MAE with magnetically soft inclusions in the form of a thin disk (platelet) having the magnetic anisotropy in the plane of this disk is solved analytically. An external magnetic field acts with torques on magnetic filler particles, creates mechanical stresses in the vicinity of inclusions, induces shear strain, and increases the effective shear modulus of these composite materials. It is shown that the largest effect of the magnetic field on the effective shear modulus should be expected in MAEs with soft elastomer matrices, where the shear modulus of the matrix is less than the magnetic anisotropy constant of inclusions. It is derived that the effective shear modulus is nonlinearly dependent on the external magnetic field and approaches the saturation value in magnetic fields exceeding the field of particle anisotropy. It is shown that model calculations of the effective shear modulus correspond to a phenomenological definition of effective elastic moduli and magnetoelastic coupling constants. The obtained theoretical results compare well with known experimental data. Determination of effective elastic coefficients in MAEs and their dependence on magnetic field is discussed. The concentration dependence of the effective shear modulus at higher filler concentrations has been estimated using the method of Padé approximants, which predicts that both the absolute and relative changes of the magnetic-field-dependent effective shear modulus will significantly increase with the growing concentration of filler particles.

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Mechanics of Magnetopolymer Composites: A Review

Cited by 74 publications

References 66 publications

Tunable surface roughness and wettability of a soft magnetoactive elastomer

Tunable surface roughness and wettability of a soft magnetoactive elastomer

Development of magnetoactive elastomers for sealing eye retina detachments

Effect of single-particle magnetostriction on the shear modulus of compliant magnetoactive elastomers

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