Processing and Characterization of Carbon Nanotube Mat/Epoxy Composites
- Processing and Characterization of Carbon Nanotube Mat/Epoxy Composites
- carbon nanotubes; nanostructured materials; infiltration; mechanical properties; tensile test
- Issue Date
- Metals and Materials International
- VOL 17, NO 5, 697-704
- A carbon nanotube mat (CNT mat) with long (~1 mm) multi-walled carbon nanotubes (MWCNTs) was used
to process MWCNT/epoxy composites at high concentrations (4.4 and 10.0 wt.%) of MWCNTs by a simple
method without the use of a solvent. The CNT mat circumvents several cumbersome processing steps, including
the dispersion of CNTs in a solvent. Two different resin-impregnation processing methods were explored.
The processing steps were chosen to prepare composite samples based on the performance of the composites
and the simplicity of the processing techniques. Scanning electron microscopy (SEM) was used to examine
the microstructures of the CNT mat and its composites. The mechanical and electrical properties were tested.
The tensile strengths of the composites with 10.0 wt.% MWCNTs were increased by 17% to 90% when
compared to that of neat epoxy samples. The electrical conductivity of the composite is 36.1 S/cm. 4.4 wt.%-
MWCNT composites show very large strain valuesupon fracturing (> 15 %), and their electrical conductivity
is 14.9 S/cm. These results show that CNT mat/epoxy composites can be used as flexible electrodes and
as a matrix system for advanced fiber composites.
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