Rheological analysis of graphene oxide coated anisotropic PMMA microsphere based electrorheological fluid from Couette flow geometry

Au, Pek-Ing; Foo, Benjamin; Leong, Yee-Kwong; Zhang, Wen Ling; Choi, Hyoung Jin

doi:10.1016/j.jiec.2014.07.029

Cited by 16 publications

(8 citation statements)

References 51 publications

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“…Their large surface area gives them a greater sensitivity, so they can produce good data in a low shear rate test. Therefore, the concentric cylinder geometry is suitable for examining the ER fluid flow behavior due to the near constant shear rate across the gap [ 75 , 76 ]. A rotational rheometer with two parallel plate systems has been also used for the ER measurement of mesoporous cerium-doped titania particles synthesized using a block-copolymer template [ 77 ].…”

Section: Electrorheological Characteristicsmentioning

confidence: 99%

Electric Field-Responsive Mesoporous Suspensions: A Review

2015

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This paper briefly reviews the fabrication and electrorheological (ER) characteristics of mesoporous materials and their nanocomposites with conducting polymers under an applied electric field when dispersed in an insulating liquid. Smart fluids of electrically-polarizable particles exhibit a reversible and tunable phase transition from a liquid-like to solid-like state in response to an external electric field of various strengths, and have potential applications in a variety of active control systems. The ER properties of these mesoporous suspensions are explained further according to their dielectric spectra in terms of the flow curve, dynamic moduli, and yield stress.

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Section: Electrorheological Characteristicsmentioning

confidence: 99%

Electric Field-Responsive Mesoporous Suspensions: A Review

2015

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“…And they found that the chaining speed of ER fluids in the effect of multiple dipole was faster than that of single dipole and the length of chain is longer as well. By modeling and simulating, Au et al [16] researched on rheological properties of ER fluids in Couette flow field and analyzed the influence of shearing rate on the submicroscopic structure. Průša and Rajagopal [17] simulated dynamic behaviors of ER fluids in eccentric rotating cylinders by three-dimensional constitutive model.…”

Section: Introductionmentioning

confidence: 99%

Visualization Experiment on Electrorheological Fluid in Dynamic Coupling Field

Shan-an

Luo

Liu

et al. 2016

Advances in Materials Science and Engineering

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Due to lack of visualization experiment on the mechanism of electrorheological effect in dynamic field, a visualization experimental system is designed and successfully made. Through this experiment, the submicroscopic dynamic structural changes of electrorheological (ER) fluids in the coupling field composed by external electric field and flow field are observed. The experimental results indicate that the rheological behaviors of ER fluids are mainly influenced by the polarization forces and the hydrodynamic forces in the dynamic coupling field. And the experiment shows that the yield fracture of chain structures determined the yield strength of ER fluids firstly occurring near the plate electrodes, which expresses the microflow characteristic of velocity slip. Meanwhile, the capture effect has been verified in this experiment.

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“…At the high shear rate region, the shear stress of all flow curves converges to the same value despite the difference in the applied electric field strength. Thus the applied electric field affects only the low shear rate behavior and the yield stress value [16].…”

Section: Effect Of Shear Rate On Shear Stress and Viscositymentioning

confidence: 99%

Preparation of Smart Fluid from Polymer Coated Pumice Particles

Yılmaz¹,

Çalışkan²,

Yilmaz³

2016

WJCMP

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This study reports, electrorheological (ER) responses of pumice and poly(methyl methacrylate)/ pumice, PMMA/pumice, conducting composite dispersions in silicone oil (SO). Primarily three different compounds (K1, K2, K3, 73%, 48%, 22% contain pumice particles) PMMA/pumice composites were prepared and used as ER active materials. Anti-sedimentation stabilities of pumice and composite systems in silicone oil (SO) medium were determined. The application of a suspension of composite particles as an electrorheological ER fluid (20% particle concentration) was assessed using a rotational electro-rheometer, and the effects of the electric field strength, shear rate, frequency and temperature were examined. ER activity of all the composite suspensions was observed to increase with increasing concentration, electric field strength and decreasing shear rate. The PMMA/pumice composites suspensions show a typical shear thinning non-Newtonian viscoelastic behavior, in which viscosity of the suspension decremented sharply with incrementing shear rate. The ER measurement results showed that the performance of the composite suspensions was enhanced by increasing the electric field strength.

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Rheological analysis of graphene oxide coated anisotropic PMMA microsphere based electrorheological fluid from Couette flow geometry

Cited by 16 publications

References 51 publications

Electric Field-Responsive Mesoporous Suspensions: A Review

Electric Field-Responsive Mesoporous Suspensions: A Review

Visualization Experiment on Electrorheological Fluid in Dynamic Coupling Field

Preparation of Smart Fluid from Polymer Coated Pumice Particles

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