Static yield stress of a magnetorheological fluid containing Pickering emulsion polymerized Fe2O3/polystyrene composite particles

Title
Static yield stress of a magnetorheological fluid containing Pickering emulsion polymerized Fe2O3/polystyrene composite particles
Authors
곽순종서용석서영욱최형진
Keywords
MR fluid activity; Static yield stress; Seo-Seo model
Issue Date
2016-02
Publisher
Journal of colloid and interface science
Citation
VOL 463-278
Abstract
The flow behaviors of magnetorheological (MR) suspensions containing Pickering emulsion polymerized Fe2O3/polystyrene (PS) composite particles were reanalyzed using the Seo-Seo model. The experimental shear stress data obtained experimentally from the magnetorheological fluid fit well to the Seo-Seo model, indicating that this model can describe the structural reformation process of the aligned fibers at various shear rates. Unlike the dynamic yield stress obtained from the Cho-Choi-Jhon (CCJ) model, the static yield stresses obtained from the Seo-Seo model exhibit the same quadratic dependence on the magnetic field strength for both pure Fe2O3 particle suspension and Fe2O3/PS particle suspensions, which is in agreement with the predictions of the polarization model. The static yield stress plausibly explains the difference in underlying mechanism of MR fluids. (C) 2015 Elsevier Inc. All rights reserved.
URI
http://pubs.kist.re.kr/handle/201004/64775
ISSN
0021-9797
Appears in Collections:
KIST Publication > Article
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