Carbon fibres with ordered graphitic-like aggregate structures from a regenerated cellulose fibre precursor
Eichhorn, Stephen J.
Composites Science and Technology
Accepted author manuscript: Copyright © 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Reason for embargo
The production and characterisation of low modulus carbon fibres is reported from a commercially available regenerated cellulose fibre (CordenkaTM). The fibres were heat treated before the graphitisation at a temperature of 200 °C. Fibres were further heat treated and graphitised at a temperature of 2000 °C. Polarised Raman spectra of carbonised/graphitised fibres were recorded. The ratio of two Raman peaks located at ∼1350 cm-1 (D-band) and at ∼1600 cm-1 (2D band) – the ID/IG ratio – were used to follow the onset and development of the carbon/graphitic structure. It is shown that single carbon fibres processed at 2000 °C have a modulus of ∼70 GPa and strain at break >2%. A Raman spectroscopic method that follows the shift in the position of the 2D band suggests a modulus of ∼77 GPa. Transmission Electron Microscope imaging of the fibres reveals a sub-structure containing aggregates of oriented concentric turbostratic carbon domains, some of which are reminiscent of carbon nanotubes. These relatively high strength fibres (1.5 GPa) could be possible alternatives to E-glass fibres in low weight (∼30% lighter than E-glass), high volume automotive and marine applications. It is also shown that these fibres can be converted in a woven precursor form to a carbon fibre fabric without the need to weave brittle filaments.
Copyright © 2015 Elsevier. NOTICE: this is the author’s version of a work that was accepted for publication in Composites Science and Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composites Science and Technology (2015), DOI: 10.1016/j.compscitech.2015.05.009
Vol. 116, pp. 50 - 57