Journal of Materials Science

, Volume 41, Issue 17, pp 5782–5783 | Cite as

Comment on “Synthesis and electrorheological effect of PAn–BaTiO3 nanocomposite”

  • F. F. Fang
  • H. J. ChoiEmail author

Recently, Wei et al. [1] synthesized polyaniline–barium titanate (PAn–BaTiO3) nanocomposites by inorganic–organic in-situ complex technique and reported that the PAn–BaTiO3 nanocomposites based electrorheological (ER) fluid showed very high shear stress (2800 Pa) at 3.5 Kv/mm DC field compared with both the pristine PAn, and pure barium titanate. They attributed this superior ER performance to the interaction of PAn and BaTiO3. In this comment, we reanalyzed their ER data of shear stress which corresponds to dynamic yield stress as a function of applied electric field strengths via both the polarization and conductivity models. It is found that our universal yield stress equation collapses their data onto a single curve.

Based on the polarization and the nonlinear conductivity models for ER fluids, good agreement exists between predicted and measured ER behavior for various ER systems. The correlation between yield stress (τ y) and electric field strength ( E) is presented in a power...


BaTiO3 Electric Field Strength Barium Titanate Polarization Model Dynamic Yield Stress 



This work was supported by research grants from NRL (2005).


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Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  1. 1.Department of Polymer Science and EngineeringInha UniversityIncheonKorea

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