Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 102, Issue -, Pages 59-64Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2014.07.013
Keywords
Carbon nanotubes; Polymer-matrix composites (PMCs); Electrical properties; Microwave absorption
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Funding
- Russian Foundation for Basic Research [14-03-90028, 13-02-90711]
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Casting, forge-rolling, and stretching methods have been used for preparation of polystyrene composites with 0.25 wt.% loading of multiwall carbon nanotubes (MWCNTs). Electromagnetic properties of the composites were studied using impedance spectroscopy and microwave probing in the K-a band. Analysis of impedance spectra revealed capacitive behavior of the forge-rolled composite and charge tunneling through a polystyrene layer separating the nanotubes in two other composite samples. The stretched composite demonstrated anisotropy of microwave response due to predominant orientation of nanotubes along deformation direction. The near-isotropic shielding efficiency of the forge-rolled composite was attributed to strong fragmentation of MWCNTs under applied shear forces. (C) 2014 Elsevier Ltd. All rights reserved.
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