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Chemical and adhesive properties of surface-modified carbon fibres using inverse gas chromatography

: Racovich, Josefin
: Possart, Wulff; Amkreutz, Marc; Hoffmann, Michael

Saarbrücken, 2013, 131 S.
Saarbrücken, Univ., Master Thesis, 2013
Master Thesis
Fraunhofer IFAM ()

Inverse gas chromatography (IGC) is used in combination with single fibre fragmentation test (SFFT), x-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) in order to characterize and analyse the properties of surface-modified carbon fibres. Surface analysis with IGC and XPS show an increase of polar components due to the sizing of carbon fibres which enhance the adhesion and bonding to the epoxy resin. The interfacial shear strength is correspondingly increased due to the sizing. Through a plasma activation with oxygen it was found that this does not enhance the binding properties of sized fibres, however does the un-sized fibres experience a decrease in dispersive surface energies and an increase in polar components which enhance the binding process. However does sizing and oxygen activation influence different fibres differently due to different effect on surface energies and binging processes.