Abstract
Using a modified oxidative polymerization, the nano-fibrous polyaniline with 200 nm diameter and several micrometer lengths was synthesized on a large scale and then was applied as a new electrorheological (ER) fluid. Compared to conventional granular polyaniline ER fluid, the nano-fibrous polyaniline ER fluid exhibited distinctly improved suspended stability. Under electric fields, the nano-fibrous PANI ER fluid also exhibited larger ER effect. Its shear stresses are about 1.2-1.5 times as high as those of the granular PANI ER fluid. At the same time, the shear stress of nano-fibrous PANI ER fluid could maintain a stable level and even an increase for the wide shear rate regions from 0.1 s-1 to 1000 s-1 under various electric fields. In addition, the dynamic experiment showed that the shear modulus of nano-fibrous polyaniline ER fluid under electric field was higher than that of the granular polyaniline fluid, which also confirmed the larger ER effect.
Original language | English |
---|---|
Pages (from-to) | 4413-4419 |
Number of pages | 7 |
Journal | Polymer |
Volume | 49 |
Issue number | 20 |
DOIs | |
State | Published - 23 Sep 2008 |
Keywords
- Electrorheological fluid
- Nano-fibrous
- Polyaniline