Characterization, electrical percolation and magnetization studies of polystyrene/multiwall carbon nanotube composite films

Bhatia, Ravi and Prasad, V and Menon, Reghu (2010) Characterization, electrical percolation and magnetization studies of polystyrene/multiwall carbon nanotube composite films. In: Materials Science and Engineering B, 175 (3). pp. 189-194.

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Abstract

Polystyrene/multiwall carbon nanotube composite films are prepared with loading up to 7 weight percent (wt%) of multiwall carbon nanotubes by solution processing and casting technique. In the formation of these composite films, iron filled carbon nanotubes with high aspect ratio (similar to 4000) were used. Scanning electron microscopy study shows that the nanotubes are uniformly dispersed within the polymer matrix. At high magnification, bending of carbon nanotubes is noticed which can be attributed to their elastic properties. The electrical conductivity measurements show that the percolation threshold is rather low at 0.21 wt%. Hysteresis loop measurements on the bulk multiwall carbon nanotube and composite samples are done at 10, 150 and 300 K and the coercivity values are found to be largest at all the temperatures, for 1 wt% composite sample. (C) 2010 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	Materials Science and Engineering B
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Composites; Electron microscopy; Electrical properties; Magnetic properties
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	21 Dec 2010 08:23
Last Modified:	21 Dec 2010 08:23
URI:	http://eprints.iisc.ac.in/id/eprint/34557

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