Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5209241 | Reactive and Functional Polymers | 2017 | 8 Pages |
Abstract
Molybdenum and tungsten sulfides are semiconducting materials with flake-like morphology. Their applicability in electrorheological suspensions was enabled by the coating with a conducting polymer, polyaniline, after its conversion to non-conducting polyaniline base. For instance, the conductivity of tungsten sulfide, 0.056Â SÂ cmâ1, increased to 0.98Â SÂ cmâ1 after coating with polyaniline, and was conveniently reduced to 6.3Â ÃÂ 10â6Â SÂ cmâ1 after conversion to polyaniline base. Such approach reduces the potential current drifts in electrorheological suspensions and allows for the application of sulfides in electrorheology. The optical microscopy demonstrated the formation of particle chains in silicone-oil suspensions after application of electric field. The electrorheological performance was assessed by the measurement of viscosity on the shear rate in the absence and in the presence of electric field and it is discussed on the bases of dielectric spectra.
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Authors
Jaroslav Stejskal, Miroslav MrlÃk, TomáÅ¡ Plachý, Miroslava Trchová, Jana KováÅová, Yu Li,