Microstructure and magnetorheology of graphite-based MR elastomers

Tian, Tongfei; Li, Weihua; Alici, Gürsel; Du, Haiping; Deng, Yimin

doi:10.1007/s00397-011-0567-9

Cited by 98 publications

(99 citation statements)

References 25 publications

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“…Note that a graphite-based MR elastomer was reported recently to exhibit good sensing capabilities by measuring the resistance Electronic supplementary material The online version of this article (doi:10.1007/s00396-012-2627-9) contains supplementary material, which is available to authorized users. of the samples under different magnetic fields and external loadings [30,31].…”

Section: Introductionmentioning

confidence: 99%

Magnetic field intensity effect on plane electric capacitor characteristics and viscoelasticity of magnetorheological elastomer

2012

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Magnetorheological (MR) elastomer was prepared using silicone rubber and soft magnetic carbonyl iron microspheres, and then examined as dielectric materials for manufacturing electric capacitors. As a specific element, capacity of the capacitors located in a magnetic field was found to be sensitive to both the MR suspension proportion to the silicone rubber and the intensity of the applied magnetic field. Viscoelastic characteristics of the MR elastomer, represented by storage modulus and creep behavior, were also studied.

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Section: Introductionmentioning

confidence: 99%

Magnetic field intensity effect on plane electric capacitor characteristics and viscoelasticity of magnetorheological elastomer

2012

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“…The extra ingredients, such as silicone oil, graphite powder (Tian et al, 2011) and micro-sized metal powders, are commonly used to adjust the mechanical and chemical properties or electrical performance of MR elastomer. Previous studies Tian et al, 2011) proved that the addition of silicone oil could effectively enhance the MR effect of MR elastomers. MR elastomers can be categorised into two groups, namely, isotropic and anisotropic MR elastomers, which attribute to different types of polarised particle alignment inside the MR elastomers.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterisation of anisotropic magnetorheological elastomer with 45° iron particle alignment at various silicone oil concentrations

Tian

Nakano

2017

Journal of Intelligent Material Systems and Structures

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In this study, anisotropic magnetorheological elastomers with 0% and 15% weight fractions of silicone oil were fabricated under a magnetic field that was rotated with a 45°angle so that the iron particle alignment inside the magnetorheological elastomer was 45°to the direction of flat magnetorheological elastomer. Scanning electron microscopic images confirmed the aligned structure of iron particles and showed that the sample with 15% silicone oil contribution resulted in a less volume fraction of iron particles. The magnetorheological elastomers were then tested in an oscillatory pure shear mode at different shear strain amplitudes under different magnetic flux densities to measure their dynamic viscoelastic properties. The testing results showed that the magnetorheological elastomer with 15% silicone oil had lower zero-field storage and loss moduli and also had higher maximum magnetorheological effect than the magnetorheological elastomer with 0% silicone oil. Because of the 45°iron particle alignment, the storage modulus of the magnetorheological elastomers had a higher value in a particular direction than its contrary direction. These unique properties made the magnetorheological elastomers with 45°iron particle alignment to be potentially used in industry where extra support is needed in a particular direction.

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“…Li et al developed the high performance MREs with excellent mechanical and electrical properties by using graphite 5 as the additive [26,27]. In their model, the current flowing through the chain structure consisted of both a tunnel current and a conductivity current, both were dependent on the external loadings.…”

Section: Introductionmentioning

confidence: 99%

Magnetic field dependent electro-conductivity of the graphite doped magnetorheological plastomers

et al. 2015

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In this work we reported a novel graphite doped conductive magnetorheological plastomer (GMRP) with magnetic field dependent electro-conductivity. The conductivity of the GMRPs increased by increasing the content of the graphite particles, while it decreased with the graphite size. When the graphite content reached 15 wt%, the conductivity of GMRPs is approximately 10 000 times higher than the non-doped MRP. Because the iron particles in the GMRPs were magnetic, the conductivity of the GMRPs was magnetically sensitive. Upon applying a 780 mT magnetic field, the electric conductivity could increase about 1000 times larger than the one under zero magnetic field. A particle-particle resistance model was developed to investigate the influence of the magnetic field and graphite doping on the conductivity, and the fitting curve matched the experimental results very well. Finally, a magnetically controllable on-off switch based on GMRPs was proposed and its working mechanism was discussed.

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Microstructure and magnetorheology of graphite-based MR elastomers

Cited by 98 publications

References 25 publications

Magnetic field intensity effect on plane electric capacitor characteristics and viscoelasticity of magnetorheological elastomer

Magnetic field intensity effect on plane electric capacitor characteristics and viscoelasticity of magnetorheological elastomer

Fabrication and characterisation of anisotropic magnetorheological elastomer with 45° iron particle alignment at various silicone oil concentrations

Magnetic field dependent electro-conductivity of the graphite doped magnetorheological plastomers

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