Characterization of hybrid biocomposite synthesised with multi-walled carbon nanotube for finite strain application of aerospace structures
Generally, synthetic-natural hybrid composites are being introduced to lessen the use of synthetic fibres in composites as well as to deal with the drawbacks of natural fibres in biocomposites. The combination of both properties, from synthetic and natural fibres, results in hybrid biocomposites...
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| Format: | Thesis |
| Language: | English |
| Published: |
2018
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/77389/1/FK%202018%20173%20UPM%20ir.pdf |
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| Summary: | Generally, synthetic-natural hybrid composites are being introduced to lessen
the use of synthetic fibres in composites as well as to deal with the drawbacks
of natural fibres in biocomposites. The combination of both properties, from
synthetic and natural fibres, results in hybrid biocomposites with surpass
properties compared to its elements. Meanwhile, the use of nano-fillers in
composites, as reported, can either enhance or diminish the properties of
composites, depending on several factors. Therefore, this research was
intended to study the effects of multi-walled carbon nanotube (MWCNT)
concentration, on the properties of hybrid biocomposites. In this study, high
cost synthetic fibres, i.e. glass, carbon and Kevlar, were respectively
hybridised with the natural fibre of flax. The epoxy matrix used was modified
with 0%, 0.5%, 1.0%, 1.5% and 2.0% of multi-walled carbon nanotubes
(MWCNTs) to fabricate five different types of composites for each hybrid
combination. In terms of mechanical properties, hybrid flax-carbon
biocomposites with 1.0% MWCNT exhibit the highest tensile strength, while
these same hybrid combinations possess the highest flexural strength at 0.5
% MWCNT. Analysis of the thermal properties suggested that the inclusion of
MWCNT lowered the thermal stability as these nanofillers enhanced the heat
diffusion, thus speeding up the degradation. Comparison between the different
stacking sequences of hybrid flax-carbon and flax-glass with 1% of MWCNT
showed that the flax surface are penetrated by the impactor at 15 J, while the
glass and carbon surfaces were both penetrated at 20 J. The higher strength
residue of hybrid flax-glass compared to flax-carbon, analysed through the
compression after impact testing, was in a good agreement with the less
severe damage found on the flax-glass composites. |
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