Characterization of multiwall carbon nanotubes and influence of surfactant in the nanocomposite processing

Shen, Chengmin; Canet, R.; Derré, Alain; Couzi, M.; Delhaès, P.

doi:10.1016/s0008-6223(02)00405-0

Cited by 199 publications

(122 citation statements)

References 39 publications

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“…The presence of bromine caused the formation of ionic and covalent bonds with the matrix, improving the flexibility of the composites, and the electrical conductivity. However, some studies [25,[48][49][50] have shown that the surface functionalisation of GNP can also decrease the electrical properties of the nanocomposites compared to when unmodified GNP is used. As the electron displacement is known to occur mainly on the surface of graphene, highly functionalising the surface might increase the mechanical properties but decrease the electrical properties of the final product.…”

Section: Functionalisationmentioning

confidence: 99%

Effect of pre and Post-Dispersion on Electro-Thermo-Mechanical Properties of a Graphene Enhanced Epoxy

Poutrel

Wang

et al. 2016

Appl Compos Mater

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Graphene nanoplatelet (GNP) modified epoxy nanocomposites are becoming attractive to aerospace due to possible improvements in their mechanical, electrical and thermal properties at no weight cost. The process of obtaining reliable material systems provides many challenges, especially at larger scale (a volume effect). This paper reports on the main fabrication stages of GNP-based epoxy composites, namely (i) pre-dispersion, (ii) dispersion, and (iii) post-dispersion. Each stage is developed to show the interest and potential it delivers for property enhancement. Chemical modification of GNP is presented; functionalisation by Triton X-100 shows elastic modulus improvements of the epoxy at low particle content (≤3%). The post-dispersion step as an alignment of GNP into the epoxy by an electrical field is discussed. The electrical conductivity is below the simulated percolation threshold and an improvement of the thermal diffusivity of 220% when compared to non-oriented GNP epoxy sample is achieved. The work demonstrates how the addition of functionalised graphene platelets to an epoxy resin will allow it to act as electrical and thermal conductor rather than as insulator

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Section: Functionalisationmentioning

confidence: 99%

Effect of pre and Post-Dispersion on Electro-Thermo-Mechanical Properties of a Graphene Enhanced Epoxy

Poutrel

Wang

et al. 2016

Appl Compos Mater

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“…From these observations, we conclude that distinct differences exist between SWCNTs and DWCNTs. With increasing number of walls (MWCNTs) the differences are reduced 11 and the G band shows a line shape that is intermediate between those of DWCNTs and graphite. The G band corresponding to the outer walls is located towards higher wavenumbers.…”

Section: G and G 2d Band Shapes And Influence Of The Surrounding Mediummentioning

confidence: 99%

“…On the higher wavenumber side of the G band, a shoulder due to the so-called D 0 band is sometimes observed. 11 Double-wall carbon nanotubes (DWCNT) are the simplest form of MWCNT. Two synthesis routes have been reported.…”

Section: Introductionmentioning

confidence: 99%

Raman bands of double‐wall carbon nanotubes: comparison with single‐ and triple‐wall carbon nanotubes, and influence of annealing and electron irradiation

Puech

Flahaut

Bassil

et al. 2007

J Raman Spectroscopy

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“…CNTs tend to aggregate into groups due to the large surface energy (strong van der Waals attractions between individual tubes) [32]. Therefore, a variety of approaches has been introduced to decrease the nanotubes agglomeration, namely, the modification of their chemistry through noncovalent adsorption using surfactants [33][34][35][36], covalent (functionalization) by chemical modification [37][38][39][40][41][42], and metal coating (like Ni-coated SWNTs). Table 1 summarizes the work carried out so far dealing with the use of CNTs in nanofluids.…”

Section: Carbon Nanotubes and Carbon Nanotubes Metal Oxide-based Nanomentioning

confidence: 99%

Nanofluids Based on Carbon Nanostructures

Younes¹,

Ghaferi²,

Saadat³

et al. 2016

Advances in Carbon Nanostructures

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A nanofluid consists in a liquid suspension of nanometer-sized particles. These fluids may contain (or not) surface-active agents to aid in the suspension of the particles. Nanometer-sized particles have higher thermal conductivity than the base fluids. Oxides, metals, nitrides, and nonmetals, like carbon nanotubes, can be used as nanoparticles in nanofluids. Water, ethylene glycol, oils, and polymer solutions can be used as base fluids. In this chapter, we summarize the recent studies of using CNTs and graphene to improve the thermal conductivity of nanofluids. Moreover, we refer to the studies about the effect of using magnetic fields on enhancing the thermal conductivity of nanofluids. Too much discrepancy about thermal conductivity of nanofluids can be found in the literature. For carbon nanofluids, unfortunately, no significant improvements on thermal conductivity are observed using low concentrations. Different improvement percentages have been reported. This variation in the thermal conductivity can be attributed to many factors, such as particle size temperature, pH, or zeta potential. We believe that more research efforts need to be made in order to, first, improve the thermal conductivity of nanofluids and, second, assess the effect of the different parameters and conditions on the thermal conductivity of nanofluids.

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Characterization of multiwall carbon nanotubes and influence of surfactant in the nanocomposite processing

Cited by 199 publications

References 39 publications

Effect of pre and Post-Dispersion on Electro-Thermo-Mechanical Properties of a Graphene Enhanced Epoxy

Effect of pre and Post-Dispersion on Electro-Thermo-Mechanical Properties of a Graphene Enhanced Epoxy

Raman bands of double‐wall carbon nanotubes: comparison with single‐ and triple‐wall carbon nanotubes, and influence of annealing and electron irradiation

Nanofluids Based on Carbon Nanostructures

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