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Issue 3, 2012

Preparation and characterization of hybrid conducting polymer–carbon nanotube yarn

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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.

Graphical abstract: Preparation and characterization of hybrid conducting polymer–carbon nanotube yarn

Supplementary files

Article information


Submitted
25 Oct 2011
Accepted
25 Nov 2011
First published
16 Dec 2011

Nanoscale, 2012,4, 940-945
Article type
Paper

Preparation and characterization of hybrid conducting polymercarbon nanotube yarn

J. Foroughi, G. M. Spinks, S. R. Ghorbani, M. E. Kozlov, F. Safaei, G. Peleckis, G. G. Wallace and R. H. Baughman, Nanoscale, 2012, 4, 940 DOI: 10.1039/C2NR11580H

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