Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 122, Issue -, Pages 67-76Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2019.04.013
Keywords
Natural fibres; Interface/interphase; Fibre/matrix bond; CT analysis
Funding
- Czech Science Foundation [16-09161S]
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In an attempt to improve mechanical properties of basalt fibre/epoxy composites, the present work provides a comparison between the effects of a commercial coupling agent, a thermal de-sizing treatment and a plasma polymerization process on the fibre/matrix interfacial strength. The different basalt fibres were characterized in terms of surface morphology, by FE-SEM observations, and chemical composition, performing FT-IR analysis. The interfacial adhesion has been investigated by single fibre fragmentation test on single filament composite samples. The plasma polymerization process was able to produce a homogeneous tetravinylsilane (pp-TVS) coating on the surface of basalt fibres, which resulted in a significant increase in the fibre/matrix adhesion. The surface roughness of the untreated and treated basalt fibres has been measured by AFM and a relationship between the surface roughness and the fibre/matrix adhesion quality was found. High-resolution micro tomography (mu-CT) has been used to support the analysis of the damage modes during fragmentation tests.
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