A systematic study of carbon fibre surface grafting via in situ diazonium generation for improved interfacial shear strength in epoxy matrix composites

Beggs, Kathleen M., Servinis, Linden, Gengenbach, Thomas R., Huson, Mickey G., Fox, Bronwyn L. and Henderson, Luke C. 2015, A systematic study of carbon fibre surface grafting via in situ diazonium generation for improved interfacial shear strength in epoxy matrix composites, Composites science and technology, vol. 118, pp. 31-38, doi: 10.1016/j.compscitech.2015.08.001.

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Title A systematic study of carbon fibre surface grafting via in situ diazonium generation for improved interfacial shear strength in epoxy matrix composites
Author(s) Beggs, Kathleen M.
Servinis, Linden
Gengenbach, Thomas R.
Huson, Mickey G.
Fox, Bronwyn L.
Henderson, Luke C.ORCID iD for Henderson, Luke C. orcid.org/0000-0002-4244-2056
Journal name Composites science and technology
Volume number 118
Start page 31
End page 38
Total pages 8
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015-10-01
ISSN 0266-3538
Keyword(s) Carbon fibre
Diazo-species
Fibre-to-matrix adhesion
Surface grafting
Summary A recently established means of surface functionalization of unsized carbon fibres for enhanced compatibility with epoxy resins was optimised and evaluated using interfacial shear stress measurements. Interfacial adhesion has a strong influence on the bulk mechanical properties of composite materials. In this work we report on the optimisation of our aryl diazo-grafting methodology via a series of reagent concentration studies. The fibres functionalised at each concentration are characterised physically (tensile strength, modulus, coefficient of friction, and via AFM), and chemically (XPS). The interfacial shear strength (IFSS) of all treated fibres was determined via the single fibre fragmentation test, using the Kelly-Tyson model. Large increases in IFSS for all concentrations (28-47%) relative to control fibres were observed. We show that halving the reagent concentration increased the coefficient of friction of the fibre and the interfacial shear strength of the composite while resulting in no loss of the key performance characteristics in the treated fibre.
Language eng
DOI 10.1016/j.compscitech.2015.08.001
Field of Research 030503 Organic Chemical Synthesis
091202 Composite and Hybrid Materials
030306 Synthesis of Materials
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Grant ID DP140100165
Copyright notice ©2015, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30078039

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