Magnetic carbonyl iron suspension with organoclay additive and its magnetorheological properties

Mpitloane Joseph Hato; Hyoung Jin Choi; Hyung Hoon Sim; Byung Oh Park; Suprakas Sinha Ray

doi:10.1016/j.colsurfa.2010.12.029

Magnetic carbonyl iron suspension with organoclay additive and its magnetorheological properties

Mpitloane Joseph Hato, Hyoung Jin Choi, Hyung Hoon Sim, Byung Oh Park, Suprakas Sinha Ray

Research output: Contribution to journal › Article › peer-review

86 Citations (Scopus)

Abstract

Soft magnetic carbonyl iron (CI) based magnetorheological (MR) fluids containing three different loadings of submicron-sized organoclay were prepared. The MR characteristics were measured via rotational and oscillatory tests, in which the flow curves exhibited a non-Newtonian behaviour for all investigated samples. The dynamic yield stress change was measured as a function of magnetic field strength by adopting a linear fit of the relation of log (τ_y) proportional to log (H), which was originally applied for electrorheological fluids. The viscoelastic performances of the pure CI suspension and the CI/organoclay suspensions showed the existence of a solid-like character. The sedimentation ratio was also investigated to confirm the role of sub-micron organoclay particles on the MR properties, in which the dispersion stability of pure CI was improved with increasing the content of organoclay in the CI suspension.

Original language	English
Pages (from-to)	103-109
Number of pages	7
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	377
Issue number	1-3
DOIs	https://doi.org/10.1016/j.colsurfa.2010.12.029
Publication status	Published - 5 Mar 2011
Externally published	Yes

Keywords

Carbonyl iron
Magnetorheological fluid
Organoclay
Sedimentation

ASJC Scopus subject areas

Surfaces and Interfaces
Physical and Theoretical Chemistry
Colloid and Surface Chemistry

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10.1016/j.colsurfa.2010.12.029

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title = "Magnetic carbonyl iron suspension with organoclay additive and its magnetorheological properties",

abstract = "Soft magnetic carbonyl iron (CI) based magnetorheological (MR) fluids containing three different loadings of submicron-sized organoclay were prepared. The MR characteristics were measured via rotational and oscillatory tests, in which the flow curves exhibited a non-Newtonian behaviour for all investigated samples. The dynamic yield stress change was measured as a function of magnetic field strength by adopting a linear fit of the relation of log (τy) proportional to log (H), which was originally applied for electrorheological fluids. The viscoelastic performances of the pure CI suspension and the CI/organoclay suspensions showed the existence of a solid-like character. The sedimentation ratio was also investigated to confirm the role of sub-micron organoclay particles on the MR properties, in which the dispersion stability of pure CI was improved with increasing the content of organoclay in the CI suspension.",

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AU - Choi, Hyoung Jin

AU - Sim, Hyung Hoon

AU - Park, Byung Oh

AU - Ray, Suprakas Sinha

PY - 2011/3/5

Y1 - 2011/3/5

N2 - Soft magnetic carbonyl iron (CI) based magnetorheological (MR) fluids containing three different loadings of submicron-sized organoclay were prepared. The MR characteristics were measured via rotational and oscillatory tests, in which the flow curves exhibited a non-Newtonian behaviour for all investigated samples. The dynamic yield stress change was measured as a function of magnetic field strength by adopting a linear fit of the relation of log (τy) proportional to log (H), which was originally applied for electrorheological fluids. The viscoelastic performances of the pure CI suspension and the CI/organoclay suspensions showed the existence of a solid-like character. The sedimentation ratio was also investigated to confirm the role of sub-micron organoclay particles on the MR properties, in which the dispersion stability of pure CI was improved with increasing the content of organoclay in the CI suspension.

AB - Soft magnetic carbonyl iron (CI) based magnetorheological (MR) fluids containing three different loadings of submicron-sized organoclay were prepared. The MR characteristics were measured via rotational and oscillatory tests, in which the flow curves exhibited a non-Newtonian behaviour for all investigated samples. The dynamic yield stress change was measured as a function of magnetic field strength by adopting a linear fit of the relation of log (τy) proportional to log (H), which was originally applied for electrorheological fluids. The viscoelastic performances of the pure CI suspension and the CI/organoclay suspensions showed the existence of a solid-like character. The sedimentation ratio was also investigated to confirm the role of sub-micron organoclay particles on the MR properties, in which the dispersion stability of pure CI was improved with increasing the content of organoclay in the CI suspension.

KW - Carbonyl iron

KW - Magnetorheological fluid

KW - Organoclay

KW - Sedimentation

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Magnetic carbonyl iron suspension with organoclay additive and its magnetorheological properties

Abstract

Keywords

ASJC Scopus subject areas

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