Carbon nanotube/polyetheretherketone nanocomposites: mechanical, thermal, and electrical properties

Zhang, Xiangcheng

doi:10.1177/0021998320981134

Cited by 20 publications

(11 citation statements)

References 135 publications

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“…The effect of particles on crack growth can be divided into two types, one is to consume fracture energy and decelerate crack growth, another is to become stress concentration area and induce crack initiation. Figure 12A shows the enhancement mechanism of CNTs, the studies [ 34,35 ] indicated that the well dispersion CNTs increased work consumed during pullout, the CNTs with chemical graft improved bonding strength between CNTs and resin, which intensified the energy consumed during the bonds broken, thus improved the interface properties macroscopically. Figure 12B shows the pinning mechanism of nanoparticles, due to a great stiffness than resin, the path of crack propagation would deflection, which consumed fracture energy and resulted in the slowdown of crack propagation speed.…”

Section: Resultsmentioning

confidence: 99%

Study on polyetheretherketone prepreg manufactured by aqueous system of powder impregnation

Huan

et al. 2022

Polymer Composites

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Aiming to improve safety and stability in manufacturing poly-ether-ether-ketone (PEEK) prepreg by powder impregnation, the aqueous system combined with surfactant and thickener was proposed in this paper. Based on surface tension method, the effects of surfactants and concentration on dispersion efficiency of PEEK powders were studied, and concentration of surfactants was determined. The effect of thickener concentration on suspension stability was analyzed, and ingredients of aqueous system were optimized by mechanical tests. The results show that, dispersion efficiency would reach maximum when surfactant concentration at critical micelle concentration, but not affected by the type of surfactant. Network association mechanism of thickener could improve stability of suspension, which holding time was increased from 40 min to 4 h. The good dispersion effect and long times stable system improved the coefficient variation of resin mass fraction, which was reduced from 7% to 4%. Compared with circulating system, the mechanical test results showed that the tensile strength kept unchanged, but interlayer properties were associated with carbon residue mass, the lower the residue carbon mass, the higher the interlayer strength retention rate, the optimized ingredient was Aerosol OT 75%E solution. Aqueous system has characteristics of safety, green, and low cost, which fits the demands of industrial production of prepreg.

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Section: Resultsmentioning

confidence: 99%

Study on polyetheretherketone prepreg manufactured by aqueous system of powder impregnation

Huan

et al. 2022

Polymer Composites

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“…The doped polymers are changed in the conduction properties from insulator materials to semiconductor materials. The relative carrier concentration (n) and the carrier mobility (μ) related to the conductivity ζ [7].…”

Section: ………………(1)mentioning

confidence: 99%

A study on electrical properties of polymer enhancement by multiwalled carbon nanotube

Abdullah

2022

JK-Physics

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In this research study composite materials (Epoxy resins / multi walled carbon nanotubes) were prepared by mixing ratio of multi walled carbon nanotubes (MWCNTs) (1,2,3 and 4 %wt.). The techniques were implemented by mixing blend epoxy resins with MWCNTs through magnetic stirrer for 15min. Homogenize the blend was carried out using the homogenizer equipment ultrasonic liquid processor with high-intensity for 5min and followed by the addition of the hardener to the mixture. The molds prepared by casting EP/MWCNTs composite. The electrical conductivity of EP/MWCNTs composite was obtained by A.C equipment. The results showed that there was an evolution from insulator state to semiconductor state when increasing the mixing ratios of MWCNTs. The electrical conductivity was improved by three orders than samples of pure epoxy resins matrix. DOI: http://dx.doi.org/10.31257/2018/JKP/2022/140104

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“…High-temperature engineering thermoplastics are gaining growing interest as they provide a lightweight solution, with outstanding properties, at high temperatures [ 1 , 2 , 3 ]. Polymers that can fulfil these requirements are grouped together as high-temperature polymers.…”

Section: Introductionmentioning

confidence: 99%

High-Performance PEEK/MWCNT Nanocomposites: Combining Enhanced Electrical Conductivity and Nanotube Dispersion

Silva,

Barbosa,

Sousa

et al. 2024

Polymers

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High-performance engineering thermoplastics offer lightweight and excellent mechanical performance in a wide temperature range. Their composites with carbon nanotubes are expected to enhance mechanical performance, while providing thermal and electrical conductivity. These are interesting attributes that may endow additional functionalities to the nanocomposites. The present work investigates the optimal conditions to prepare polyether ether ketone (PEEK)/multi-walled carbon nanotube (MWCNT) nanocomposites, minimizing the MWCNT agglomerate size while maximizing the nanocomposite electrical conductivity. The aim is to achieve PEEK/MWCNT nanocomposites that are suitable for melt-spinning of electrically conductive multifilament’s. Nanocomposites were prepared with compositions ranging from 0.5 to 7 wt.% MWCNT, showing an electrical percolation threshold between 1 and 2 wt.% MWCNT (107–102 S/cm) and a rheological percolation in the same range (1 to 2 wt.% MWCNT), confirming the formation of an MWCNT network in the nanocomposite. Considering the large drop in electrical conductivity typically observed during melt-spinning and the drawing of filaments, the composition PEEK/5 wt.% MWCNT was selected for further investigation. The effect of the melt extrusion parameters, namely screw speed, temperature, and throughput, was studied by evaluating the morphology of MWCNT agglomerates, the nanocomposite rheology, and electrical properties. It was observed that the combination of the higher values of screw speed and temperature profile leads to the smaller number of MWCNT agglomerates with smaller size, albeit at a slightly lower electrical conductivity. Generally, all processing conditions tested yielded nanocomposites with electrical conductivity in the range of 0.50–0.85 S/cm. The nanocomposite processed at higher temperature and screw speed presented the lowest value of elastic modulus, perhaps owing to higher matrix degradation and lower connectivity between the agglomerates. From all the process parameters studied, the screw speed was identified to have the higher impact on nanocomposite properties.

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Carbon nanotube/polyetheretherketone nanocomposites: mechanical, thermal, and electrical properties

Cited by 20 publications

References 135 publications

Study on polyetheretherketone prepreg manufactured by aqueous system of powder impregnation

Study on polyetheretherketone prepreg manufactured by aqueous system of powder impregnation

A study on electrical properties of polymer enhancement by multiwalled carbon nanotube

High-Performance PEEK/MWCNT Nanocomposites: Combining Enhanced Electrical Conductivity and Nanotube Dispersion

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