Flexible electrospun polyvinylidene fluoride nanofibrous composites with high electrical conductivity and good mechanical properties by employing ultrasonication induced dispersion of multi-walled carbon nanotubes

This article focuses on exploring how the electrical conductivity and densification properties of metallic samples made from aluminum (Al) powders reinforced with 0.5 wt % concentration of multi-walled carbon nanotubes (MWCNTs) and consolidated through spark plasma sintering (SPS) process are affected by the carbon nanotubes dispersion and the Al particles morphology. Experimental characterization tests performed by scanning electron microscopy (SEM) and by energy dispersive spectroscopy (EDS) show that the MWCNTs were uniformly ball-milled and dispersed in the Al surface particles, and undesirable phases were not observed in X-ray diffraction measurements. Furthermore, high densification parts and an improvement of about 40% in the electrical conductivity values were confirmed via experimental tests performed on the produced sintered samples. These results elucidate that modifying the powder morphology using the ball-milling technique to bond carbon nanotubes into the Al surface particles aids the ability to obtain highly dense parts with increasing electrical conductivity properties.

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Effects of nano-SiO2 coated multi-walled carbon nanotubes on mechanical properties of cement-based composites

Construction and Building Materials ◽

10.1016/j.conbuildmat.2021.122577 ◽

2021 ◽

Vol 281 ◽

pp. 122577

Author(s):

Shaojie Li ◽

Yuling Zhang ◽

Shaosen Lin ◽

Jun Yan ◽

Shiguo Du

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Nano Sio2 ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

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Enhancement of out-of-plane mechanical properties of carbon fiber reinforced epoxy resin composite by incorporating the multi-walled carbon nanotubes

SN Applied Sciences ◽

10.1007/s42452-021-04624-2 ◽

2021 ◽

Vol 3 (6) ◽

Author(s):

Seyed Ali Mirsalehi ◽

Amir Ali Youzbashi ◽

Amjad Sazgar

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Tensile Test ◽

Epoxy Resin ◽

Laminate Composite ◽

Filament Winding ◽

Hybrid Nanocomposites ◽

Out Of Plane ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

AbstractIn this study, epoxy hybrid nanocomposites reinforced by carbon fibers (CFs) were fabricated by a filament winding. To improve out-of-plane (transverse) mechanical properties, 0.5 and 1.0 Wt.% multi-walled carbon nanotubes (MWCNTs) were embedded into epoxy/CF composites. The MWCNTs were well dispersed into the epoxy resin without using any additives. The transverse mechanical properties of epoxy/MWCNT/CF hybrid nanocomposites were evaluated by the tensile test in the vertical direction to the CFs (90º tensile) and flexural tests. The fracture surfaces of composites were studied by scanning electron microscopy (SEM). The SEM observations showed that the bridging of the MWCNTs is one of the mechanisms of transverse mechanical properties enhancement in the epoxy/MWCNT/CF composites. The results of the 90º tensile test proved that the tensile strength and elongation at break of nanocomposite with 1.0 Wt.% MWCNTs improved up to 53% and 50% in comparison with epoxy/CF laminate composite, respectively. Furthermore, the flexural strength, secant modulus, and elongation of epoxy/1.0 Wt.% MWCNT/CF hybrid nanocomposite increased 15%, 7%, and 9% compared to epoxy/CF laminate composite, respectively.

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