The alignment of single walled carbon nanotubes in an epoxy resin by applying a DC electric field

Monti, Marco; Natali, Maurizio; Torre, Luigi; Kenny, J. M.

doi:10.1016/j.carbon.2012.01.067

Cited by 131 publications

(106 citation statements)

References 34 publications

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“…Alignment mechanism of CNTs consisted from four stages [16]. In the first stage, due to the application of electric field, a dipole moment induced at the edges of CNTs resulted in their rotation to a certain angle and thence aligned in the direction of electric field.…”

Section: Alignment Mechanism Of Cnts Within the Matrixmentioning

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 Mechanism Of Cnts Within the Matrixmentioning

confidence: 99%

“…In this case, interruption of applied current can lead to collapse of developed network which known as relaxation mechanism [16].…”

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

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

“…In fact, electric-field induced alignment of SWCNTs in dispersion is not new and has been reported before. [14][15][16] However previous works in aqueous media could only resolve alignment of bundles of SWCNTs and not of well dispersed individual SWCNTs. Using a low-k solvent instead of water, it is in fact possible to resolve the field alignment of individually dispersed SWCNTs as we will show in this work.…”

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confidence: 99%

Chiral-index resolved length mapping of carbon nanotubes in solution using electric-field induced differential absorption spectroscopy

Hennrich

Flavel

et al. 2016

Nanotechnology

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The length of single-walled carbon nanotubes (SWCNTs) is an important metric for the integration of SWCNTs into devices and for the performance of SWCNT-based electronic or optoelectronic applications. In this work we propose a rather simple method based on electric-field induced differential absorption spectroscopy (EFIDAS) to measure the chiralindex-resolved average length of SWCNTs in dispersions. The method takes advantage of the electric-field induced length-dependent dipole moment of nanotubes and has been verified and calibrated by atomic force microscopy. This method not only provides a low cost, in-situ approach for length measurements of SWCNTs in dispersion, but due to the sensitivity of the method to the SWCNT chiral index, the chiral index dependent average length of fractions obtained by chromatographic sorting can also be derived. Also, the determination of the chiral-index resolved length distribution seems to be possible using this method.

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“…However, the full potential of carbon nanomaterials is yet to be realized due to difficulties of dispersing and aligning such additives in polymers [16][17][18]. Recently, it was reported that an electric field can be employed to align carbon nanotubes (CNTs) [19,20], carbon nanofibres (CNFs) [21,22] and graphene nanoplatelets (GNPs) [23], with the resulting polymeric nanocomposites exhibiting significantly improved fracture toughness and electrical conductivity compared with their randomly-oriented counterparts. The application of a magnetic field is also as an effective way to align carbon nanomaterials in polymers.…”

Section: Introductionmentioning

confidence: 99%

A novel route for tethering graphene with iron oxide and its magnetic field alignment in polymer nanocomposites

Zhang

Ladani

et al. 2016

Polymer

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We present a new route for tethering graphene nanoplatelets (GNPs) with Fe 3 O 4 nanoparticles to enable their alignment in an epoxy using a weak magnetic field. The GNPs are first stabilised in water using poly(vinylpyrrolidone) (PVP) and Fe 3 O 4 nanoparticles are then attached via coprecipitation. The resultant Fe 3 O 4 /PVP-GNPs nanohybrids are superparamagnetic and can be aligned in an epoxy resin, before gelation, by applying a weak magnetic field as low as 0.009 T.A theoretical model describing the alignment process is presented. The resulting nanocomposites exhibit anisotropic properties with significantly improved electrical conductivities (three orders of magnitude) in the alignment direction and dramatically increased fracture energy (about 530%) when the nanohybrids are aligned transverse to the crack growth direction, compared with the unmodified epoxy. Compared with the randomly-oriented nanocomposites, these aligned nanocomposites show approximately 50% increase in toughness transverse to the alignment direction and a seven-fold increase in electrical conductivity in the alignment direction.

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The alignment of single walled carbon nanotubes in an epoxy resin by applying a DC electric field

Cited by 131 publications

References 34 publications

Electric Field Induced Alignment of Carbon Nanotubes: Methodology and Outcomes

Electric Field Induced Alignment of Carbon Nanotubes: Methodology and Outcomes

Chiral-index resolved length mapping of carbon nanotubes in solution using electric-field induced differential absorption spectroscopy

A novel route for tethering graphene with iron oxide and its magnetic field alignment in polymer nanocomposites

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