Electrorheological fluids of polypyrrole-tin oxide nanocomposite particles
Tóm tắt
The electrorheological (ER) response of polypyrrole(PPy)-tin oxide nanocomposite ER fluids increased with the increase in the tin oxide/pyrrole weight ratio, particle volume fraction, and electric field strength. The dielectric properties and direct current (dc) conductivity of PPy-tin oxide nanocomposite particles and the dielectric properties of PPy-tin oxide nanocomposite ER fluids agreed with the ER behaviors. The ER behavior of PPy-tin oxide nanocomposite ER fluids was well fitted to τ = 0.0248ϕE
1.5 and showed a transition from that of the polarization model (τ ∼ E
2) to that of the conduction model (τ ∼ E
1.5) depending on the tin oxide/pyrrole weight ratio.
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