Abstract
Conducting polypyrrole (PPy)-wrapped halloysite nanotube (HNT) nanocomposites (PPy/HNT) were prepared using an in situ polymerization process of pyrrole monomer in the presence of a HNT dispersion, and its electrorheological (ER) properties were investigated under applied electric fields. The morphology of both HNT and PPy/HNT nanocomposite was examined by scanning electron microscopy and transmission electron microscopy. The synthesized PPy/HNT nanocomposites were also analyzed using a physisorption analyzer, Fourier-transform infrared spectroscopy, and thermogravimetric analysis. The ER properties of the PPy/HNT nanocomposite dispersed in silicone oil measured using a rotational rheometer under different electric field strengths exhibited ER behaviors of shear stress, dynamic moduli, and relaxation modulus with a change in slope from 1.5 to 1.0.
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Acknowledgements
This study was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, Korea (2013) through Dongbu C&I.
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Jang, D.S., Zhang, W.L. & Choi, H.J. Polypyrrole-wrapped halloysite nanocomposite and its rheological response under electric fields. J Mater Sci 49, 7309–7316 (2014). https://doi.org/10.1007/s10853-014-8443-5
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DOI: https://doi.org/10.1007/s10853-014-8443-5