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

Yuezhen Dong, Jianbo Yin, Xiaopeng Zhao

Research output: Contribution to journalArticlepeer-review

110 Scopus citations

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. This journal is

Original languageEnglish
Pages (from-to)9812-9819
Number of pages8
JournalJournal of Materials Chemistry A
Volume2
Issue number25
DOIs
StatePublished - 7 Jul 2014

Fingerprint

Dive into the research topics of 'Microwave-synthesized poly(ionic liquid) particles: A new material with high electrorheological activity'. Together they form a unique fingerprint.

Cite this