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Effect of surface functionality of PAN-based carbon fibres on the mechanical performance of carbon/epoxy composites
journal contribution
posted on 2014-04-09, 00:00 authored by Abdullah Al Kafi, M Huson, Claudia CreightonClaudia Creighton, J Khoo, L Mazzola, T Gengenbach, F Jones, Bronwyn FoxThe performance of composite laminates depends on the adhesion between the fibre reinforcement and matrix, with the surface properties of the fibres playing a key role in determining the level of adhesion achieved. For this reason it is important to develop an in-depth understanding of the surface functionalities on the reinforcement fibres. In this work, multi-scale surface analysis of carbon fibre during the three stages of manufacture; carbonisation, electrolytic oxidation, and epoxy sizing was carried out. The surface topography was examined using scanning electron microscopy (SEM), which revealed longitudinal ridges and striations along the fibre-axis for all fibre types. A small difference in surface roughness was observed by scanning probe microscopy (SPM), while the coefficient of friction measured by an automated single fibre tester showed 51% and 98% increase for the oxidised and sized fibres, respectively. The fibres were found to exhibit heterogeneity in surface energy as evidenced from SPM force measurements. The unsized fibres were much more energetically heterogeneous than the sized fibre. A good correlation was found between fibre properties (both physical and chemical) and interlaminar shear strength (ILSS) of composites made from all three fibre types. © 2014 Elsevier Ltd.
History
Journal
Composites Science and TechnologyVolume
94Pagination
89 - 95Publisher
ElsevierLocation
Doetinchem, NetherlandsPublisher DOI
ISSN
0266-3538Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalCopyright notice
2014, ElsevierUsage metrics
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No categories selectedKeywords
A. Carbon fibresB. Fibre-matrix bondD. Dynamic mechanical thermal analysis (DMTA)D. Scanning electron microscopy (SEM)X-ray photoelectron spectroscopy (XPS)Science & TechnologyTechnologyMaterials Science, CompositesMaterials ScienceCarbon fibresFibre matrix bondScanning electron microscopy (SEM)Dynamic mechanical thermal analysis (DMTA)ATOMIC-FORCE MICROSCOPEINTERFACIAL ADHESIONEPOXY COMPOSITESFRICTIONPARTICLES
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