The properties of the interphase between Twaron aramid fibres and polymer matrix systems can be optimized by a surface treatment process of the fibres. In this work, x-ray photoelectron spectroscopy and low-energy ion scattering have been used to analyse the surface layers, whereas the adhesion was measured by a bundle pull-out experiment. From the results, we succeeded in establishing a relation between the surface treatment, the resulting chemical/elemental surface composition and the adhesion to an epoxy matrix.
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The results on the oxidized silicon confirm the small influence of surface roughness for silica particles, whereas measurements on the more closely packed metallic gallium and gold surfaces indicate a significant surface roughness effect.
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