Paper Title:
Encapsulation of Carbonyl Iron Particles with Poly(Vinyl Butyral) and their Magnetorheology
  Abstract

To enhance dispersion stability of magnetorheological (MR) fluids, hybrid magnetic particles of carbonyl iron (CI)/ poly(vinyl butyral) (PVB) with core/shell microstrcutre (CI-PVB) were prepared, since pure magnetic CI based MR fluid systems show severe sedimentation of the CI particles due to the large density mismatch with the carrier liquid and difficulties in redispersion after caking. The composite particles of CI-PVB have a lower density than that of the pure CI particles, while exhibiting almost original magnetic property of the CI. Both CI and CI-PVB particles were dispersed in mineral oil (20 vol%) and their MR characteristics were examined via a rotational rheometer with a magnetic field supplier. Various characterizations of the CI-PVB particles were performed via SEM, TEM and FT-IR. Both yield stress and flow curve of shear stress as a function of shear rate of the MR fluids were investigated under applied magnetic field strengths.

  Info
Periodical
Key Engineering Materials (Volumes 334-335)
Edited by
J.K. Kim, D.Z. Wo, L.M. Zhou, H.T. Huang, K.T. Lau and M. Wang
Pages
193-196
DOI
10.4028/www.scientific.net/KEM.334-335.193
Citation
J. L. You, B.J. Park, I.B. Jang, H. J. Choi, "Encapsulation of Carbonyl Iron Particles with Poly(Vinyl Butyral) and their Magnetorheology ", Key Engineering Materials, Vols. 334-335, pp. 193-196, 2007
Online since
March 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Anna Boczkowska, Stefan F. Awietjan
Abstract:In this paper studies on urethane magnetorheological elastomers (MREs) microstructure in respect to their magnetic and mechanical properties...
107
Authors: Anna Boczkowska, Stefan F. Awietjan
Abstract:Magnetorheological elastomers (MREs) were obtained by mixing soft polyurethane and carbonyl-iron particles. The effect of the volume fraction...
766
Authors: Cheng Bin Du, Wei Qing Chen, Fa Xue Wan
Abstract:The hydrophilic-lipophilic balance (HLB) parameters of surfactants have a significant effect on properties of surfactants and determine the...
843
Authors: Cheng Bin Du, Guo Jun Yu, Zhi Wei Gong
Chapter 5: Materials Science & Engineering
Abstract:The influence of carbonyl iron particles sizes on the properties of magneto-rheological fluids (MRFs) were studied. Different-sized carbonyl...
623
Authors: Wen Qiang Zhang
Chapter 2: Manufacturing and Design Science
Abstract:Diatomite coated with ɑ-Fe films were obtained by Chemical Vapor Deposition process. The resultant Fe-coated flaky diatomite particles had...
2628