Magnetorheological characteristics of aqueous suspensions that contain Fe3O4 nanoparticles

Rwei, Syang‐Peng; Lee, H. Y.; Yoo, Sang Dong; Wang, Liang Yi; Lin, Jiun-Chuan

doi:10.1007/s00396-005-1314-5

Cited by 18 publications

(8 citation statements)

References 9 publications

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“…The frequency was swept over the range 10 −2 Hz < ω <10 2 Hz, the real part and the imaginary part of the shear moduli, representing the storage modulus G′ and loss modulus Gʺ, respectively, were obtained. A detailed description of the instrument and measurement can be found in the authors’ other work [ 10 , 21 , 22 ].…”

Section: Experimental Methodsmentioning

confidence: 99%

Synthesis and Rheological Characterization of Water-Soluble Glycidyltrimethylammonium-Chitosan

et al. 2014

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In this study, chitosan (CS) grafted by glycidyltrimethylammonium chloride (GTMAC) to form GTMAC-CS was synthesized, chemically identified, and rheologically characterized. The Maxwell Model can be applied to closely simulate the dynamic rheological performance of the chitosan and the GTMAC-CS solutions, revealing a single relaxation time pertains to both systems. The crossover point of G′ and Gʺ shifted toward lower frequencies as the CS concentration increased but remained almost constant frequencies as the GTMAC-CS concentration increased, indicating the solubility of GTMAC-CS in water is good enough to diminish influence from the interaction among polymer chains so as to ensure the relaxation time is independent of the concentration. A frequency–concentration superposition master curve of the CS and GTMAC-CS solutions was subsequently proposed and well fitted with the experimental results. Finally, the sol-gel transition of CS is 8.5 weight % (wt %), while that of GTMAC-CS is 20 wt %, reconfirming the excellent water solubility of the latter.

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Section: Experimental Methodsmentioning

confidence: 99%

Synthesis and Rheological Characterization of Water-Soluble Glycidyltrimethylammonium-Chitosan

et al. 2014

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“…Nanoparticles are capable of forming a uniform dispersion in a carrier medium, and of improving the tendencies of sedimentation [2,3]. Fe nanoparticle is one of the best candidates for MR fluids due to its high saturation magnetization [1,10], among other magnetic nanoparticles such as ferrites [3,[6][7][8] and alloys [9]. Fe nanoparticles for MR fluids have been synthesized using a microwave plasma technique, with an average diameter of 20 nm [10] and 28 nm [11,12].…”

Section: Introductionmentioning

confidence: 99%

Magnetorheology of colloidal dispersion containing Fe nanoparticles synthesized by the arc-plasma method

Noma¹,

Abe²,

Kikuchi³

et al. 2010

Journal of Magnetism and Magnetic Materials

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“…A magnetorheological (MR) fluid can be rapidly transformed from a Newtonian fluid-like structure to a solid-like structure with viscoelastic-plastic yielding by applying a magnetic field [1][2][3][4][5][6][7]. Rabinow [8] discovered this phenomenon in 1948.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Magnetorheology Study of Iron Oxide and Iron Cobalt Oxide Suspensions

Rwei

Wang

Yang

2013

Journal of Nanomaterials

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This study investigates the magnetorheology (MR) of polydimethylsiloxane (PDMS) that contains magnetic powders of various compositions, shapes, and concentrations. Two magnetic powders, Fe3O4and CoFe2O4, were synthesized. TEM images reveal that a powder of spherical particles was obtained at high temperature. A powder with nonspherical star shape was synthesized at low temperature. A rheological test confirmed a typical Bingham behavior for all the MR fluids prepared in this study. Experimental results demonstrated that the cobalt ferrite exhibited a more superior yield stress than the ferrite compound. A magnetic powder of larger particles was found to have higher yield stress. Moreover, the spherical particles yielded a higher yield stress than the star-shaped particles. The “saturated magnetic strength” increased with the loading of the magnetic powder. Finally, the results demonstrate that 12 wt% CoFe2O4nanopowder (10 nm) dispersed in the PDMS liquid exhibited a large range of yield stresses (0 to 644 Pa).

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Magnetorheological characteristics of aqueous suspensions that contain Fe3O4 nanoparticles

Cited by 18 publications

References 9 publications

Synthesis and Rheological Characterization of Water-Soluble Glycidyltrimethylammonium-Chitosan

Synthesis and Rheological Characterization of Water-Soluble Glycidyltrimethylammonium-Chitosan

Magnetorheology of colloidal dispersion containing Fe nanoparticles synthesized by the arc-plasma method

Synthesis and Magnetorheology Study of Iron Oxide and Iron Cobalt Oxide Suspensions

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