Rheological Properties and Stability of Magnetorheological Fluids using Viscoelastic Medium and Nanoadditives

Jong Hyeok Park; Moo Hyun Kwon; O. Ok Park

doi:10.1007/BF02706371

Rheological Properties and Stability of Magnetorheological Fluids using Viscoelastic Medium and Nanoadditives

Jong Hyeok Park, Moo Hyun Kwon, O. Ok Park

Department of Chemical and Biomolecular Engineering

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

35 Citations (Scopus)

Abstract

In order to improve the stability of magnetorheological (MR) fluids, viscoelastic medium having 2.2 Pa yield stress has been used as a continuous phase and nanosized CrO₂ particles are added too. The rheological properties as well as the dispersion stability of MR fluids have been studied by using a stress-controlled rheometer and sedimentation test. The steady-shear MR response was independent of the continuous and nano additives and the field-induced yield stress increased subquadratically with the flux density. Since the constant stress is generated within the limit of zero shear rate, the plateau in the flow curve corresponds to the Bingham yield stress. Under an external field, the yield stress varied as B^3/2. The yield stress has an approximately linear relation with the particle volume fraction.

Original language	English
Pages (from-to)	580-585
Number of pages	6
Journal	Korean Journal of Chemical Engineering
Volume	18
Issue number	5
DOIs	https://doi.org/10.1007/BF02706371
Publication status	Published - 2001 Sep

Bibliographical note

Funding Information:
The authors express special appreciation to the financial support of Korea Science and Engineering Foundation (Project No: 97-0200-0701-3). This work is also partially Suplmrted by the Brain Korea 21 Project of Ministry of Education (MOE) of Korea.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)

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10.1007/BF02706371

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title = "Rheological Properties and Stability of Magnetorheological Fluids using Viscoelastic Medium and Nanoadditives",

abstract = "In order to improve the stability of magnetorheological (MR) fluids, viscoelastic medium having 2.2 Pa yield stress has been used as a continuous phase and nanosized CrO2 particles are added too. The rheological properties as well as the dispersion stability of MR fluids have been studied by using a stress-controlled rheometer and sedimentation test. The steady-shear MR response was independent of the continuous and nano additives and the field-induced yield stress increased subquadratically with the flux density. Since the constant stress is generated within the limit of zero shear rate, the plateau in the flow curve corresponds to the Bingham yield stress. Under an external field, the yield stress varied as B3/2. The yield stress has an approximately linear relation with the particle volume fraction.",

author = "Park, {Jong Hyeok} and Kwon, {Moo Hyun} and Park, {O. Ok}",

note = "Funding Information: The authors express special appreciation to the financial support of Korea Science and Engineering Foundation (Project No: 97-0200-0701-3). This work is also partially Suplmrted by the Brain Korea 21 Project of Ministry of Education (MOE) of Korea.",

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AU - Kwon, Moo Hyun

AU - Park, O. Ok

N1 - Funding Information: The authors express special appreciation to the financial support of Korea Science and Engineering Foundation (Project No: 97-0200-0701-3). This work is also partially Suplmrted by the Brain Korea 21 Project of Ministry of Education (MOE) of Korea.

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AB - In order to improve the stability of magnetorheological (MR) fluids, viscoelastic medium having 2.2 Pa yield stress has been used as a continuous phase and nanosized CrO2 particles are added too. The rheological properties as well as the dispersion stability of MR fluids have been studied by using a stress-controlled rheometer and sedimentation test. The steady-shear MR response was independent of the continuous and nano additives and the field-induced yield stress increased subquadratically with the flux density. Since the constant stress is generated within the limit of zero shear rate, the plateau in the flow curve corresponds to the Bingham yield stress. Under an external field, the yield stress varied as B3/2. The yield stress has an approximately linear relation with the particle volume fraction.

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