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Hierarchical carbon fibre composites incorporating high loadings of carbon nanotubes
- Publication Year :
- 2022
- Publisher :
- Elsevier BV, 2022.
-
Abstract
- Uncured solid bisphenol-A epoxy resins containing up to 20 wt% carbon nanotubes (CNTs) were prepared using melt blending in a high shear mixer. The extrudate was ground to produce fine nanocomposite (NC) powders. This simple method produced well-dispersed NC, with CNT agglomerate sizes below 1 μm. Consolidated NCs displayed improved tensile moduli and strengths up to 3.3 GPa (+32%) and 78 MPa (+19%), respectively at 15 wt% CNT, compared to the pure cured epoxy matrix. The relatively high Tg of 39 ◦C for the uncured NC powders simplified the manufacture of composite prepregs using wet powder impregnation. The prepregs were laminated into hierarchical carbon fibre reinforced composites with improved through-thickness properties. Interlaminar shear strength improved for intermediate CNT loadings in the matrix up to 65 MPa (10 wt% CNT, +19%) but decreased at higher concentrations. Compression moduli remained constant irrespectively of CNT loading but compression strength increased with a CNT loading of 2.5 wt% to 772 MPa (+31%). The mechanical properties of the hierarchical composites reflect good consolidation (void content
- Subjects :
- COPPER-OXIDE
Technology
B. Mechanical properties
Science & Technology
Powder processing
A. Carbon fibres
Materials Science
General Engineering
Carbon nanotubes
A. Carbon nanotubes
Mechanical properties
MECHANICAL-PROPERTIES
Carbon fibres
NANOCOMPOSITES
09 Engineering
DISPERSION
E. Powder processing
Materials Science, Composites
ROUTE
Ceramics and Composites
NANOPARTICLES
EPOXY-RESIN
Materials
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....79254e942f87edc76b201cb0f8d2ef9a