Synthesis and rheology of ferrofluids: a review

Genç, Seval; Derin, Bora

doi:10.1016/j.coche.2013.12.006

Cited by 117 publications

(64 citation statements)

References 28 publications

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“…Iron oxide nanoparticles are mostly used as magnetic particles in ferrofluids due to their high saturation magnetization and their high magnetic susceptibility [7][8][9]. In order to counterbalance van der Waals attraction and attractive part of magnetic dipolar interaction, colloidal stability of magnetic liquids requires an additional repulsion between the particles [10]. This may be realized through a steric hindrance by coating the particles with surfactant chains [11,12].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Stability Study of Carboxyl Terminated Silicone Oil Modified Silicone-oil-based Ferrofluid

Zhou¹,

Chen²,

Liu³

et al. 2019

JMAG

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In this study, ferrofluids were prepared by colloidal dispersion of paramagnetic Fe 3 O 4 nanoparticles coated with long-chain carboxyl terminated silicone oil in silicone oil. Effect of pH value of the aqueous solution on coating was investigated. The IR and TG analysis indicated that acid conditions favored the coating of carboxyl terminated silicone oil. Stabilities of ferrofluids were characterized by density change and mass specific saturated magnetization change during centrifugation and static settlement observation. The static settlement observation indicated that the prepared silicone-oil-based ferrofluids have better stability than unmodified and oleic acid modified ferrofluids. Finally, the magnetic properties and stability of ferrofluids with different particle mass fraction were characterized.

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Section: Introductionmentioning

confidence: 99%

Preparation and Stability Study of Carboxyl Terminated Silicone Oil Modified Silicone-oil-based Ferrofluid

Zhou¹,

Chen²,

Liu³

et al. 2019

JMAG

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“…A common theme in soft condensed matter physics and biological physics is the formation of large ordered structures from smaller building blocks [1,2] that are sometimes analogs of ordered phases in (hard) condensed matter. These structures can be macroscopic in size, such as bulk (liquid) crystals [3,4], plastic crystals [5,6], quasicrystals [7,8] and ferrofluids [9], but also mescoscopic structures are found, such as the double-stranded helix in DNA molecules [10], the secondary (and ternary) structures in proteins [11], micelles and membranes [1], and periodic structures in block copolymers [12]. In this paper, we will show that like-charged colloidal spheres can form also mesoscopic structures, such as alternating strings and clusters, which we will investigate both in experiment and in theory.…”

Section: Introductionmentioning

confidence: 99%

Alternating strings and clusters in suspensions of charged colloids

Everts

Linden²,

Blaaderen³

et al. 2016

Soft Matter

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We report the formation of alternating strings and clusters in a binary suspension of repulsive charged colloids with double layers larger than the particle size. Within a binary cell model we include many-body and charge-regulation effects under the assumption of a constant surface potential, and consider their repercussions on the two-particle interaction potential. We find that the formation of induced dipoles close to a charge-reversed state may explain the formation of these structures. Finally, we will touch upon the formation of dumbbells and small clusters in a one-component system, where the effective electrostatic interaction is always repulsive.

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“…As the particle size of the magnetic phase is very small, thermal agitation gives rise to Brownian forces that can overcome the alignment of the dipoles generated by ordinary field strengths. Thus, FFs exhibit field dependent viscosity but they exhibit a negligible yield stress under magnetic fields [50]. Recently, a new family of FFs consisting of fiber-shaped particles has arisen [51], providing larger yield stress and viscosities, but worse stability than conventional ferrofluids.…”

Section: Ferrofluidsmentioning

confidence: 99%

Complex Fluids in Energy Dissipating Systems

Galindo-Rosales

2016

Applied Sciences

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Abstract:The development of engineered systems for energy dissipation (or absorption) during impacts or vibrations is an increasing need in our society, mainly for human protection applications, but also for ensuring the right performance of different sort of devices, facilities or installations. In the last decade, new energy dissipating composites based on the use of certain complex fluids have flourished, due to their non-linear relationship between stress and strain rate depending on the flow/field configuration. This manuscript intends to review the different approaches reported in the literature, analyses the fundamental physics behind them and assess their pros and cons from the perspective of their practical applications.

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Synthesis and rheology of ferrofluids: a review

Cited by 117 publications

References 28 publications

Preparation and Stability Study of Carboxyl Terminated Silicone Oil Modified Silicone-oil-based Ferrofluid

Preparation and Stability Study of Carboxyl Terminated Silicone Oil Modified Silicone-oil-based Ferrofluid

Alternating strings and clusters in suspensions of charged colloids

Complex Fluids in Energy Dissipating Systems

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