A recent study by the Institute of Polymers and Composites at Hamburg University of Technology (TUHH) has compared neat and TUBALL single wall carbon nanotube modified unidirectional carbon fibre prepreg. At ultra-low concentrations of 0.01 and 0.05 wt.%, nanotubes significantly improve fracture properties and fatigue behaviour.
The study analysed a hotmelt epoxy prepreg system that was modified with an industrially available masterbatch containing TUBALL single wall carbon nanotubes produced by OCSiAl.
The neat and modified carbon fibre prepreg were subjected to ordinary service conditions, specifically an impact of 28 J. Specimens modified with 0.05 wt.% of nanotubes recorded a significant reduction of delamination area by 19%. Additionally the compression after impact strength was increased by around 5%.
Results achieved have encouraged the Hamburg University of Technology to continue testing of advanced high-performance materials created with the use of TUBALL single wall carbon nanotubes. Large manufacturers are running industrial trials. Further results will demonstrate even higher potential for high-grade composites for a wide range of applications.
At JEC World 2017 in Paris, Hall 5A, booth G23, OCSiAl will showcase its core product – TUBALL nanotubes – and the advanced nanotube-based modifiers that are now available for a variety of materials. Next-generation nano-augmented materials that have already been successfully commercialised will also be on show.