Preparation and Characterization of Hybrid Conducting Polymer–Carbon Nanotube Yarn

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Preparation and Characterization of Hybrid Conducting Polymer–Carbon Nanotube Yarn

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Title: Preparation and Characterization of Hybrid Conducting Polymer–Carbon Nanotube Yarn
Author(s):
Foroughi, Javad;
Spinks, Geoffrey M.;
Ghorbani, Shaban R.;
Kozlov, Mikhail E.;
Safaei, Farzad;
Peleckis, Germanas;
Wallace, Gordon G.;
Baughman, Ray H.
Format: Text
Item Type: Article
Keywords: Magnetoresistance
Polypyrrole fibers
Polyaniline
Abstract: Hybrid polypyrrole (PPy)-multi walled carbon nanotube(MWNT) yarns were obtained by chemical and electrochemical polymerization of pyrrole on the surface and within the porous interior of twisted MWNT yarns. The material was characterized by scanning electron microscopy, electrochemical, mechanical and electrical measurements. It was found that the hybrid PPy-MWNT yarns possessed significantly higher mechanical strength (over 740 MPa) and Young's modulus (over 54 GPa) than the pristine MWNT yarn. The hybrid yarns also exhibited substantially higher electrical conductivity (over 235 S cm(-1)) and their specific capacitance was found to be in excess of 60 F g(-1). Measurements of temperature dependence of electrical conductivity revealed semiconducting behaviour, with a large increase of band gap near 100 K. The collected low temperature data are in good agreement with a three-dimensional variable range hopping model (3D-VRH). The improved durability of the yarns is important for electrical applications. The composite yarns can be produced in commercial quantities and used for applications where the electrical conductivity and good mechanical properties are of primary importance.
ISSN: 2040-3364
Source: Nanoscale
Link to Related Resource: http://dx.doi.org/10.1039/c2nr11580h
Persistent Link: http://hdl.handle.net/10735.1/3102
Terms of Use: ©2013 The Royal Society of Chemistry. This article may not be further made available or distributed.

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