The size induced effect on rheological properties of Co-ferrite based ferrofluid

Chand, Mahesh; Kumar, Sandeep; Shankar, Ajay; Porwal, Rajni; Pant, R. P.

doi:10.1016/j.jnoncrysol.2012.10.003

Cited by 41 publications

(14 citation statements)

References 32 publications

(33 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the magnetic field was turned off, the shear stress was confronted with a sudden decrease and destroyed the chain-like structures. The decrease of shear stress with time is related to gradual distortion of aggregate structures which indicates the presence of larger size particles in the ferrofluid [30,31]. A delay time in shear stress was clearly observed following the magnetic field removed from the ferrofluid, which is related to the magnitude of the relevant magnetic field.…”

Section: Resultsmentioning

confidence: 92%

Facile synthesis and magnetorheological properties of superparamagnetic CoFe2O4/GO nanocomposites

Wang

Dong

et al. 2015

Applied Surface Science

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 92%

Facile synthesis and magnetorheological properties of superparamagnetic CoFe2O4/GO nanocomposites

Wang

Dong

et al. 2015

Applied Surface Science

View full text Add to dashboard Cite

“…3a–c (inset). S-shaped dependence with no saturation and no remanence at 100 and 300 K, but with hysteresis loop at 5 K, is characteristic for superparamagnetic behaviour 43 , 44 . As known, when the size of NPs is close to superparamagnetic critical diameters (for Fe 3 O 4 ~4 nm), then the magnetic moment is not stable, and therefore H c = 0 43 .…”

Section: Resultsmentioning

confidence: 95%

Silver and ultrasmall iron oxides nanoparticles in hydrocolloids: effect of magnetic field and temperature on self-organization

Ivashchenko

Peplińska

Gapiński

et al. 2018

Sci Rep

View full text Add to dashboard Cite

Micro/nanostructures, which are assembled from various nanosized building blocks are of great scientific interests due to their combined features in the micro- and nanometer scale. This study for the first time demonstrates that ultrasmall superparamagnetic iron oxide nanoparticles can change the microstructure of their hydrocolloids under the action of external magnetic field. We aimed also at the establishment of the physiological temperature (39 °C) influence on the self-organization of silver and ultrasmall iron oxides nanoparticles (NPs) in hydrocolloids. Consequences of such induced changes were further investigated in terms of their potential effect on the biological activity in vitro. Physicochemical characterization included X-ray diffraction (XRD), optical microscopies (SEM, cryo-SEM, TEM, fluorescence), dynamic light scattering (DLS) techniques, energy dispersive (EDS), Fourier transform infrared (FTIR) and ultraviolet–visible (UV-Vis) spectroscopies, zeta-potential and magnetic measurements. The results showed that magnetic field affected the hydrocolloids microstructure uniformity, fluorescence properties and photodynamic activity. Likewise, increased temperature caused changes in NPs hydrodynamic size distribution and in hydrocolloids microstructure. Magnetic field significantly improved photodynamic activity that was attributed to enhanced generation of reactive oxygen species due to reorganization of the microstructure.

show abstract

“…8, which indicates that magnetic particles retain some memory of the applied magnetic eld. 33,38 3.3.4 F-MRFs gures of merit. There are several gures of merit which are related to the uid efficiency and dened as a ratio of the mechanical to the electrical power densities of a MR uid-based device.…”

Section: Field-induced Relaxation Behaviormentioning

confidence: 99%

An improved properties of bidispersed magneto-rheological fluids

et al. 2014

Self Cite

View full text Add to dashboard Cite

We have investigated the influence of nanosized particle concentration on rheological properties when mixed with a magnetorheological (MR) fluid. We have also studied the structural, morphological and magnetic properties of ferrofluid-based MR fluids (F-MRFs). Field-induced rheological and viscoelastic properties of F-MRFs with varying shear rate and strain amplitude have been investigated. The HerschelBulkley model was found to fit well with the flow behaviour of F-MRFs. In the oscillatory strain sweep test, F-MRFs show linear viscoelasticity at low strain and the storage modulus (G 0 ) is higher than the viscous modulus (G 00 ), which indicates the existence of strong links among the particles that form the microscopic structures. The storage modulus increases with increasing weight fraction of nanosized particles. Furthermore, the loss factor (ratio of G 00 and G 0 ) was also investigated as a function of magnetic field strength. In addition, time-dependent relaxation behaviour of magnetically induced chain-like structures has also been described. The study reveals that the addition of nanoparticles to MR fluids increases the viscosity as well as the fluid stability under a magnetic field.

show abstract

The size induced effect on rheological properties of Co-ferrite based ferrofluid

Cited by 41 publications

References 32 publications

Facile synthesis and magnetorheological properties of superparamagnetic CoFe2O4/GO nanocomposites

Facile synthesis and magnetorheological properties of superparamagnetic CoFe2O4/GO nanocomposites

Silver and ultrasmall iron oxides nanoparticles in hydrocolloids: effect of magnetic field and temperature on self-organization

An improved properties of bidispersed magneto-rheological fluids

Contact Info

Product

Resources

About