Effect of fibre spinning conditions on the electrical properties of cellulose and carbon nanotube composite fibres spun using ionic liquid as a benign solvent

Chenchen Zhu, Jinhu Chen, Krzysztof Koziol, Jeffrey Gilman, Sameer Rahatekar

Research output: Contribution to journalArticle (Academic Journal)

20 Citations (Scopus)

Abstract

The aim of this study was to develop electrically conductive fibres from cellulose. To achieve this, the effect of fibre extrusion speed and fibre winding speed on the degree of alignment of multiwall carbon nanotubes (MWNTs), as well as the resulting electrical properties of the cellulose/MWNTs composite fibres were systematically studied. 1-Ethyl-3-Methylimidazolium Acetate (EMIMAc) was used as an environmentally benign solvent for dissolution of cellulose as well as for dispersion of MWNTs in the solution dope. To achieve good dispersion of MWNTs in the cellulose solution dope, MWNTs were non-covalently functionalized using carboxymethyl cellulose (CMC). This significantly improved the dispersion of MWNTs in the solution dope. The degree of alignment of MWNTs in 0.10 mass fraction cellulose/MWNTs fibres after fibre extrusion, and after both fibre extrusion and winding, was studied with a Scanning Electron Microscope (SEM) and Wide Angle X-ray Diffraction (WAXD). The degree of alignment of MWNTs was correlated with the electrical properties. A significant decrease in electrical conductivity accompanied the increase in degree of alignment of MWNTs when fibres were spun with higher extrusion speed. The decrease was also measured when fibres were spun with higher winding speed using a constant extrusion speed. However, the decrease in conductivity due to winding was low relative to fibres spun at highest extrusion speed.
Original languageEnglish
Article numberWOS:000329321100003
Pages (from-to)154-163
Number of pages10
JournaleXPRESS Polymer Letters
Volume8
Issue number3
DOIs
Publication statusPublished - Mar 2014

Keywords

  • NANOCOMPOSITES
  • CELLULOSE
  • IONIC LIQUIDS
  • FIBRE SPINNING
  • CONDUCTIVITY

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