Effects of carbon nanotube alignment on electrical and mechanical properties of epoxy nanocomposites

Khan, Shafi Ullah; Pothnis, Jayaram R.; Kim, Jang Kyo

doi:10.1016/j.compositesa.2013.01.015

Cited by 217 publications

(145 citation statements)

References 48 publications

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“…electrical and mechanical properties [2][3][4][5][6][7]. What is more, alignment of CNTs can be achieved via various methods such as electrical field [2-4, 7, 8], magnetic field [9], shear flow [10,11], mechanical force [12,13], and electrospinning [14,15], which electrical fieldinduced alignment is the simplest and most manageable method for alignment of CNTs within the matrix.…”

Section: Alignment Of Cnts Within the Matrix Can Boost Their Propertimentioning

confidence: 99%

“…Carbon nanotube (CNT) is a unique material with fantastic electrical, thermal, and mechanical properties, and since its discovery by Iijima in 1991 [1], global attention attracted toward it, and many researchers have evaluated the extraordinary properties of CNTs toward development of nanocomposites and sheets holding highly oriented CNTs with enhanced electrical and mechanical properties [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electric Field Induced Alignment of Carbon Nanotubes: Methodology and Outcomes

Amani¹,

Hashemi²,

Mousavi³

et al. 2018

Carbon Nanotubes - Recent Progress

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In the current chapter, achievement of aligned carbon nanotube (CNT) network within the matrix via various kinds of electric fields (AC and DC) was evaluated. In this case, alignment mechanism of CNTs within the matrix and two useful techniques for justification of CNT alignment throughout the matrix were examined and presented, respectively. Afterward, effective factors in matter of CNT alignment and applicable procedures for fabrication of nanocomposites containing aligned CNTs were studied and presented, respectively. At the end, significant effects of CNT alignment on overall properties of nanocomposites that include electrical and mechanical properties were evaluated. Achieved results revealed that alignment of CNTs within the matrix can lead to significant improvement in the electrical and mechanical properties of nanocomposites at the same filler loading compared with randomly distribution of CNTs within the matrix, while production steps and conditions can also highly affect the outcome data.

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Section: Alignment Of Cnts Within the Matrix Can Boost Their Propertimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electric Field Induced Alignment of Carbon Nanotubes: Methodology and Outcomes

Amani¹,

Hashemi²,

Mousavi³

et al. 2018

Carbon Nanotubes - Recent Progress

View full text Add to dashboard Cite

show abstract

“…It has been demonstrated that both agglomeration and poor dispersion impair stress transfer and weaken the composites (20). This, in turn, hampers either the Young's modulus or the fracture toughness, while alignment of CNTs in an epoxy matrix significantly improves the elastic modulus and fracture toughness compared to random orientation (21). Moreover, the failure modes of CNTs may transfer from pull-out to sliding fracture after functionalisation, which could favour energy consumption and thus contribute more to improve the fracture toughness (22).…”

Section: Introductionmentioning

confidence: 99%

Investigation into the toughening mechanism of epoxy reinforced with multi-wall carbon nanotubes

Zhang

Zhai

et al. 2015

E-Polymers

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This study reports the reinforcement and fracture toughening mechanism of pristine multi-walled carbon nanotubes (MWCNTs) on epoxy matrix. The tensile strength and fracture energy (G IC ) of the epoxy polymer increased simultaneously upon the addition of a small amount of MWCNTs. The fracture surfaces of single-edgenotch three-point bending test specimens were analysed by scanning electron microscopy, and the double-notch four-point bending technique was used to investigate the fracture process by transmission electron microscopy, respectively. MWCNT pull-out and subsequent plastic void growth were found; meanwhile, fracture of MWCNTs was observed along the crack propagation path. The theoretical model of shearing band initiated by the stress concentrations around the MWCNTs is the dominant toughening mechanism. While the crack bridging of MWCNTs and the plastic void growth of epoxy also have a toughening effect.

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“…According to the literature [1], the introduction of nanoparticles cause pinning, branching, bridging and deflection of crack, which results in decreasing of the crack driving force at the crack tip, thus plays an important role in improving the fracture toughness of EP. In addition, Khanet al [2] have indicated that the nanoparticles with large aspect ratio (lamellar, one-dimensional rod like) are favorable for the bridging and deflection of the crack, and the ordered arrangement of the nanorods perpendicular to the direction of crack growth further promotes the crack bridging and deflection. Even though there are many methods to make the orientation of nanoparticles, the magnetic field (MF) induced orientation method is more simple and efficient [3].…”

Section: Introductionmentioning

confidence: 99%

The Properties of Epoxy Composites Containing Aligned Iron Oxide Nanorods by Low Magnetic Field

Li¹,

Ma²,

Ou³

et al. 2017

Proceedings of the 2017 International Conference on Manufacturing Engineering and Intelligent Materials (ICMEIM 2017)

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Abstract. The magnetic iron oxide (Fe 2 O 3 ) nanorods were synthesized, and the epoxy resin (EP) composites with the content of 1wt% Fe 2 O 3 were prepared in the condition of magnetic field. X ray diffraction, scanning electron microscopy and comprehensive physical properties measurement system were used to characterize the composition, morphology and magnetic properties of the nanorods, respectively. The effects of a low magnetic field (≤0.06T) on fracture toughness, compressive strength and glass transition temperature of the composites were specifically investigated. The results show that the critical stress intensity factor, critical strain energy release rate and the compressive strength of Fe 2 O 3 /EP composites with magnetic field induction are 1.33 MPa·m 1/2 , 0.56 KJ/m 2 and 206.5MPa, which are increased by 7.3%, 27% and 15% compared to of EP effectively.

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Effects of carbon nanotube alignment on electrical and mechanical properties of epoxy nanocomposites

Cited by 217 publications

References 48 publications

Electric Field Induced Alignment of Carbon Nanotubes: Methodology and Outcomes

Electric Field Induced Alignment of Carbon Nanotubes: Methodology and Outcomes

Investigation into the toughening mechanism of epoxy reinforced with multi-wall carbon nanotubes

The Properties of Epoxy Composites Containing Aligned Iron Oxide Nanorods by Low Magnetic Field

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