Magnetic Particle Filled Elastomeric Hybrid Composites and Their Magnetorheological Response

Kwon, Seung Hyuk; Lee, Jin Hyun; Choi, Hyoung Jin

doi:10.3390/ma11061040

Cited by 46 publications

(30 citation statements)

References 147 publications

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“…MREs are fabricated by adding high magnetic permeability particles to a viscoelastic material [ 49 ]. As such, the magnetic particles added to the MR elastomer play an important role in the MR effect.…”

Section: Mre Materialsmentioning

confidence: 99%

Magnetorheological Elastomers: Fabrication, Characteristics, and Applications

et al. 2020

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Magnetorheological (MR) elastomers become one of the most powerful smart and advanced materials that can be tuned reversibly, finely, and quickly in terms of their mechanical and viscoelastic properties by an input magnetic field. They are composite materials in which magnetizable particles are dispersed in solid base elastomers. Their distinctive behaviors are relying on the type and size of dispersed magnetic particles, the type of elastomer matrix, and the type of non-magnetic fillers such as plasticizer, carbon black, and crosslink agent. With these controllable characteristics, they can be applied to various applications such as vibration absorber, isolator, magnetoresistor, and electromagnetic wave absorption. This review provides a summary of the fabrication, properties, and applications of MR elastomers made of various elastomeric materials.

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Section: Mre Materialsmentioning

confidence: 99%

Magnetorheological Elastomers: Fabrication, Characteristics, and Applications

et al. 2020

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“…Both G ′ and G ″ maintained plateau at the strain region up to 63%; within the range of 1–63% strain viscoelastic region is independent of the shear percentage. [ 29–31 ] CaproGlu moduli begin to decrease dramatically as the G ′ drops for an order of magnitude within the region of 63–137% strain. Linear viscoelasticity should closely match the tissue substrates.…”

Section: Figurementioning

confidence: 99%

In Vitro Biocompatibility of Diazirine‐Grafted Biomaterials

Djordjević

Wicaksono

Šolić

et al. 2020

Macromol. Rapid Commun.

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Photoactivation of aryl‐diazirines is an emerging method of rapid, covalent crosslinking under ambient conditions. These attributes make those compounds candidates for grafting onto inert polymer backbones in order to produce stimuli‐sensitive biomaterials. However, no risk assessments are available to gauge the toxicity of the leachable components after crosslinking activation. Herein, a stimuli‐sensitive biomaterial is formulated from diazirine‐grafted polycaprolactone tetrol. Also known as CaproGlu, this biomaterial undergoes UVA‐activated crosslinking, with many positive attributes toward bioadhesive applications; hydrophobic, solvent‐free, liquid at room temperature, and transitions into a foam biorubber after mild UVA illumination. As a model diazirine‐grafted biomaterial, hydrolyzed CaproGlu leachates are evaluated for genotoxicity and skin sensitization, namely, Ames test, direct peptide reactivity, and ARE‐Nrf2 luciferase assays. The degradation products of diazirine‐mediated crosslinking observe little to no risk of in vitro genotoxicity or skin sensitization.

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“…In a 2.0 kV/mm electric field, the

value reached 250%, and the

value exceeded 1100%. High values of electrorheological sensitivity for the ERE-5 sample indicate the high mobility of macromolecules in its structure and a significant range of changes in its elasto-plastic properties when an electric field was applied, comparable with the control range of magnetorheological elastomers [ 47 ]. It should be noted that the high electrorheological sensitivity of the ERE-5 sample, in comparison with the ERE-0 sample, is consistent with significantly higher values of the dielectric characteristics of the ERE-5 sample (see below)–the permittivity difference ε 0 – ε ∞ , higher tg δ values at the point of relaxation maximum and slower relaxation processes during polarization, which, according to general theories about the electrorheological sensitivity of electrorheological fluids, should contribute to a pronounced electrorheological effect.…”

Section: Resultsmentioning

confidence: 99%

Electrorheological Properties of Polydimethylsiloxane/TiO2-Based Composite Elastomers

et al. 2020

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Electrorheological elastomers based on polydimethylsiloxane filled with hydrated titanium dioxide with a particle size of 100–200 nm were obtained by polymerization of the elastomeric matrix, either in the presence, or in the absence, of an external electric field. The viscoelastic and dielectric properties of the obtained elastomers were compared. Analysis of the storage modulus and loss modulus of the filled elastomers made it possible to reveal the influence of the electric field on the Payne effect in electrorheological elastomers. The elastomer vulcanized in the electric field showed high values of electrorheological sensitivity, 250% for storage modulus and 1100% for loss modulus. It was shown, for the first time, that vulcanization of filled elastomers in the electric field leads to a significant decrease in the degree of crosslinking in the elastomer. This effect should be taken into account in the design of electroactive elastomeric materials.

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Magnetic Particle Filled Elastomeric Hybrid Composites and Their Magnetorheological Response

Cited by 46 publications

References 147 publications

Magnetorheological Elastomers: Fabrication, Characteristics, and Applications

Magnetorheological Elastomers: Fabrication, Characteristics, and Applications

In Vitro Biocompatibility of Diazirine‐Grafted Biomaterials

Electrorheological Properties of Polydimethylsiloxane/TiO2-Based Composite Elastomers

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