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Issue 25, 2014
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Microwave-synthesized poly(ionic liquid) particles: a new material with high electrorheological activity

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Abstract

Hydrophobic poly(ionic liquid) particles are synthesized by a microwave-assisted dispersion polymerization method and their electro-responsive characteristic is investigated as a new water-free polyelectrolyte-based electrorheological (ER) system. Structure characterization shows that the poly(ionic liquid) particles are uniform microspheres with a narrow size distribution of ∼1.8 μm and a low density of ∼1.62 g cm−3. Under electric fields, the fluid of poly(ionic liquid) particles in silicone oil shows low current density but high ER activity including small off-field viscosity, large field-induced shear stress and storage modulus, and stable flow curves in a wide shear rate region. The ER effect increases with particle content. The typical shear stress is ∼2500 Pa at 4 kV mm−1 and 100 s−1, which is ∼30 times as high as the off-field shear stress. Dielectric spectra analysis indicates that the high ER activity can be attributed to strong dielectric polarizability and adequate polarization response induced by the high-density of cation/anion parts in poly(ionic liquid) particles. The ER activity also depends on the type of cation/anion parts.

Graphical abstract: Microwave-synthesized poly(ionic liquid) particles: a new material with high electrorheological activity

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Publication details

The article was received on 17 Feb 2014, accepted on 14 Apr 2014 and first published on 14 Apr 2014


Article type: Paper
DOI: 10.1039/C4TA00828F
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J. Mater. Chem. A, 2014,2, 9812-9819

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    Microwave-synthesized poly(ionic liquid) particles: a new material with high electrorheological activity

    Y. Dong, J. Yin and X. Zhao, J. Mater. Chem. A, 2014, 2, 9812
    DOI: 10.1039/C4TA00828F

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