Structure and electrical resistivity of individual carbonised natural and man-made cellulose fibres
| Autor: | Jozef Keckes, Sabine C. Bodner, Wolfgang Gindl-Altmutter, Christoph Unterweger, Notburga Gierlinger, Nannan Xiao, Ivana Czabany |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Scattering Mechanical Engineering Carbon fibers Structural integrity 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound symbols.namesake chemistry Mechanics of Materials Electrical resistivity and conductivity visual_art visual_art.visual_art_medium symbols General Materials Science Cellulose Composite material 0210 nano-technology Raman spectroscopy Shrinkage |
| Zdroj: | Journal of Materials Science. 55:10271-10280 |
| ISSN: | 1573-4803 0022-2461 |
| Popis: | Carbon fibres were produced from two natural and two man-made cellulose fibres, respectively, in a high-temperature carbonisation process. The structure of the fibres was analysed by means of wide-angle X-ray scattering and Raman spectroscopy. It was found that longitudinal shrinkage of the fibres during carbonisation is correlated with the degree of orientation of cellulose crystals as determined by wide-angle X-ray scattering. Numerous micro-scale defects were found in carbonised natural cellulose fibres, particularly hemp, whereas the structural integrity of carbonised man-made cellulose was better preserved. Both Raman spectroscopy and wide-angle X-ray scattering revealed a trend of diminishing electrical resistivity with increasing structural (graphitic) order in the fibres. Overall, the electrical resistivity of cellulose-derived carbon fibres was between 40 and 70 Ω µm, which exceeds the resistivity of fossil-based carbon fibre by a factor ten. |
| Databáze: | OpenAIRE |
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