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Rectangular‐Shaped Polyaniline Tubes Covered with Nanorods and their Electrorheology
Author(s) -
Lee Bo Mi,
Kim Ji Eun,
Fang Fei Fei,
Choi Hyoung Jin,
Feller JeanFrancois
Publication year - 2011
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201100306
Subject(s) - polyaniline , electrorheological fluid , materials science , silicone oil , nanorod , dispersion (optics) , dispersion polymerization , rheometer , polarizability , conductivity , dielectric , composite material , polymerization , dispersion stability , polymer chemistry , electric field , rheology , polymer , chemistry , nanotechnology , optics , optoelectronics , physics , organic chemistry , quantum mechanics , molecule
Nanorod covered polyaniline (PANI) tubes with rectangular cross section are synthesized via a chemical oxidation polymerization method and then utilized as an electrorheological (ER) material by dispersion in silicone oil, resulting in 10 vol% particle concentration. These PANI tubes are chosen based on the fact that the PANI is a promising suspension material for ER fluids due to its high polarizability and controllable conductivity. The ER performances are investigated as a function of electric field strength by using a rheometer, and the frequency dependences of permittivity and dielectric loss factor of ER fluids are also measured with a LCR meter. The sedimentation observation is further examined as a function of time, demonstrating improved dispersion stability compared to general particulate PANI‐based ER fluid.