Electric field-induced aligned multi-wall carbon nanotube networks in epoxy composites

Martin, Christian A.; Sandler, Jan K.W.; Windle, Alan H.; Schwarz, Matthias-Klaus; Bauhofer, W.; Schulte, Karl; Shaffer, Milo S. P.

doi:10.1016/j.polymer.2004.11.081

Cited by 447 publications

(285 citation statements)

References 23 publications

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“…The incorporation of the untreated-CNT increased the conductivity almost nine orders of magnitude, from 2.2×10 -13 S/cm to 5.9×10 -4 S/cm when the filler content was increased from 0.05 to 0.50 wt%. This observation was consistent with previous findings on CNT nanocomposites based on similar matrix materials [16][17][18]. However, for the same filler content increase, the nanocomposites containing silane-CNT exhibited only a marginal -about two orders of magnitude -improvement in conductivity.…”

Section: Electrical Conductivity Of Nanocompositessupporting

confidence: 93%

Effects of silane functionalization on the properties of carbon nanotube/epoxy nanocomposites

Cheng

Kim

Tang

2007

Composites Science and Technology

556

271

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Abstract:The effects of silane functionalization of multi-wall carbon nanotubes (CNTs) on properties of CNT/epoxy nanocomposites are investigated in this work. Epoxy-based nanocomposites reinforced with CNTs with and without functionalization were prepared. The properties of nanocomposites were characterized extensively using the scanning electronic microscopy (SEM), electrical conductivity measurement, thermo-gravimetric analysis (TGA), dynamic mechanical analysis (DMA), three-point bending test and fracture toughness measurement. The results showed that grafting silane molecules onto the CNT surface improved the dispersion of CNTs in epoxy along with much enhanced mechanical and thermal properties as well as fracture resistance of nanocomposites compared to those containing CNTs without functionalization. The electrical conductivity of nanocomposites decreased due to the wrapping of CNTs with non-conductive silane molecules. These findings confirmed the improved interfacial interactions arising from covalent bonds between the functionalized CNTs and epoxy resin.

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Section: Electrical Conductivity Of Nanocompositessupporting

confidence: 93%

Effects of silane functionalization on the properties of carbon nanotube/epoxy nanocomposites

Cheng

Kim

Tang

2007

Composites Science and Technology

556

271

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“…Because strong conducting networks were already formed by 1wt% GNPs alone, the percolation threshold of GNP nanocomposite, incorporation of 1wt% CNT could provide an added benefit of further improving the electrical conductivity through synergy between the GNPs and CNTs. It was shown previously that once the filler content exceeded the percolation threshold, agglomerates could better improve the electrical conductivity than well dispersed fillers in CNT-epoxy nanocomposites [5] …”

Section: Electrical Conductivitymentioning

confidence: 95%

Hybrid nanocomposites containing carbon nanotubes and graphite nanoplatelets

Wong

Kim

2008

Materials Science and Engineering: A

179

100

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The effects of hybrid carbon nanotubes (GNP) and graphite nanoplatelets (GNPs) on the mechanical and electronic properties of epoxy nanocomposites are studied. When the total reinforcement contents were fixed at 2wt%, the nanocomposite containing 1% GNP and 1% CNT achieved the highest electrical conductivity of 4.7×10 -3 S/cm, which was more than two orders of magnitude higher than that of nanocomposites with 2wt% GNP alone. Although the flexural properties were only marginally changed by hybridization, the quasi-static fracture toughness could be enhanced significantly by increasing the CNT contents. Other synergic effects arising from the hybridization are discussed.

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“…Martin et al [70] studied the orientation of CNT in an epoxy resin under an electric field. They noticed that inside an epoxy system, the surface of CNT is negatively charged, due to the basic character of the epoxy system.…”

Section: Alignment By Electric Fieldmentioning

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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Electric field-induced aligned multi-wall carbon nanotube networks in epoxy composites

Cited by 447 publications

References 23 publications

Effects of silane functionalization on the properties of carbon nanotube/epoxy nanocomposites

Effects of silane functionalization on the properties of carbon nanotube/epoxy nanocomposites

Hybrid nanocomposites containing carbon nanotubes and graphite nanoplatelets

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

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