Enhanced mechanical and electrical properties of carbon fiber/poly(ether ether ketone) laminates via inserting carbon nanotubes interleaves

Abstract

The carbon fiber/(carbon nanotubes/polyetherimide)/poly ether ether ketone (CF/(CNTs/PEI)/PEEK) laminates are prepared by inserting carbon nanotubes/polyetherimide (CNTs/PEI) interleaves into interlaminar region. The mechanical properties and electrical conductivities of the developed laminates are evaluated. The results indicate that the interlaminar shear strength and flexural strength of CF/(CNTs/ PEI)/PEEK laminates are increased by 42.9% and 24.7%, after inserting CNTs2.91/PEI interleaves, respectively. The cross-sectional images of laminates after mechanical tests verify strong fiber-resin adhesion by scanning electron microscope observation. The pertinent mechanism responsible for the improvement of mechanical properties is mechanical interlocking effect of CNTs. After incorporating CNTs/PEI interleaves, the electrical conductivity of laminates is markedly improved due to the formation of conductive pathway. This work suggests that this method is compatible with the preparation process of thermoplastic composites.

Effect of Grinding and the Mill Type on Magnetic Properties of Carboxylated Multiwall Carbon Nanotubes

“…The increase in strain and density of structural defects in milled samples containing mixed hard and soft materials leads to the emergence of a new nanomaterial with the high saturation magnetization of the soft phase and the high coercivity of the hard phase. It was also found that the CNT inclusions in composite materials caused by high-energy milling leads to an improvement in their thermal, electrical, and mechanical properties [ 28 , 29 , 30 ].…”

Improving delamination resistance of carbon fiber reinforced polymeric composite by interface engineering using carbonaceous nanofillers through electrophoretic deposition: An assessment at different in‐service temperatures

“…Among all these carbonaceous nanofillers, CNT modified CE composite showed the highest flexural properties at all in‐situ temperatures when compared with unmodified CE. Good interfacial bonding at fiber/polymer interface shows superior properties as the transfer of load efficiently from the weak polymer matrix to strong fiber through these nanofillers 61,62 . The optimum properties of the composites depend on bond strength and effective surface area of nanofillers embedded at the interface of fiber and polymer.…”

Improved interfacial adhesion in carbon fiber/poly (ether ether ketone) composites with the sulfonated poly (ether ether ketone) sizing treatment

“…Carbon fiber (CF) reinforced thermoplastic polymer composites are expected to be ideal materials in the aerospace and aviation industries and other structural fields owing to their high strength, low density, and high impact toughness 1–3 . Among these composites, CF reinforced poly (ether ether ketone) (CF/PEEK) has aroused extensive attention because of its excellent performance of PEEK, including excellent impact strength, good processability, and high recyclability 3–6 . Even so, the interfacial property of CF/PEEK is seriously affected by the chemically inert CF surface, which ultimately influences the composite performance.To obtain the effective and strong interfacial bonding between the CF and matrix, many measures have been developed to modify the CF surface, including chemical grafting, plasma treatment, electrochemical oxidation, and sizing treatment 7–13 .…”