Dispersions and fibers of carbon nanotubes

Vigolo, Brigitte; Pénicaud, Alain; Coulon, C.; Sauder, Cédric; Pailler, R.; Journet, Catherine; Bernier, P.; Poulin, Philippe

doi:10.1557/proc-633-a12.1

Cited by 121 publications

(175 citation statements)

References 22 publications

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“…The measured density is 0.6 g/cm 3 , less than half the value for a crystal of 1.3 nm diameter tubes, so the density-corrected resistivity is 0.41 m -cm. This accounts approximately for gross porosity.…”

Section: Electrical Propertiesmentioning

confidence: 73%

“…Single wall carbon nanotube (SWNT) materials can be partially aligned by mechanical shear [1], anisotropic flow [2], gel extrusion [3,4] or filter deposition from suspension in strong magnetic fields [5]. One of the motivations is to obtain the highest possible fraction of the excellent intrinsic axial properties of SWNT in a real material.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetically aligned single wall carbon nanotube films: Preferred orientation and anisotropic transport properties

Fischer¹,

Zhou²,

Vavro³

et al. 2003

Journal of Applied Physics

295

177

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Thick films of single wall carbon nanotubes (SWNT) exhibiting in-plane preferred orientation have been produced by filter deposition from suspension in strong magnetic fields. We characterize the field-induced alignment with x-ray fiber diagrams and polarized Raman scattering, using a model which includes a completely unaligned fraction. We correlate the texture parameters with resistivity and thermal conductivity measured parallel and perpendicular to the alignment direction. Results obtained with 7 and 26 Tesla fields are compared. We find no significant field dependence of the distribution width, while the aligned fraction is slightly greater at the higher field. Anisotropy in both transport properties is modest, with ratios in the range 5-9, consistent with the measured texture parameters assuming a simple model of rigid rod conductors. We suggest that further enhancements in anisotropic properties will require optimizing the filter deposition process rather than larger magnetic fields. We show that both x-ray and Raman data are required for a complete texture analysis of oriented SWNT materials. Comments Postprint version. Published in Journal of ABSTRACTThick films of single wall carbon nanotubes (SWNT) exhibiting in-plane preferred orientation have been produced by filter deposition from suspension in strong magnetic fields. We characterize the field-induced alignment with x-ray fiber diagrams and polarized Raman scattering, using a model which includes a completely unaligned fraction. We correlate the texture parameters with resistivity and thermal conductivity measured parallel and perpendicular to the alignment direction. Results obtained with 7 and 26 Tesla fields are compared. We find no significant field dependence of the distribution width, while the aligned fraction is slightly greater at the higher field.Anisotropy in both transport properties is modest, with ratios in the range 5 -9, consistent with the measured texture parameters assuming a simple model of rigid rod conductors. We suggest that further enhancements in anisotropic properties will require optimizing the filter deposition process rather than larger magnetic fields. We show that both x-ray and Raman data are required for a complete texture analysis of oriented SWNT materials.

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Section: Electrical Propertiesmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Magnetically aligned single wall carbon nanotube films: Preferred orientation and anisotropic transport properties

Fischer¹,

Zhou²,

Vavro³

et al. 2003

Journal of Applied Physics

295

177

View full text Add to dashboard Cite

show abstract

“…However, in this study, carbon nanotubes were used without an aqueous colloidal dispersion by a surfactant such as sodium dodecyl sulfate (SDS), because, in our preliminary study, above 2.5 vol.% of sacrificial template, regardless of the type, was needed to enhance the permeability of the sintered diatomite membranes observably, and this amount of carbon nanotubes already far exceeded the criteria of a homogeneous dispersion of carbon nanotubes. 26) Also, we only focused on the flexible and soft aspects of light clusters of aggregated carbon nanotubes in the comparison with the rigid solid polymer spheres.…”

Section: Resultsmentioning

confidence: 99%

The effect of sacrificial templates on the pore characteristics of sintered diatomite membranes

Song

2013

J. Ceram. Soc. Japan

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Recently, porous ceramic membranes have become an interesting subject due to their outstanding thermal and chemical stability. Among the many types of ceramics, as diatomite is inherently porous and irregular, it is worthwhile to investigate the relationship between the characteristics of sacrificial templates and porous microstructures after sintering. Therefore, sintered diatomite membranes were prepared with 8¯m solid polymer spheres, 20¯m solid polymer spheres, wheat starch, and light clusters of aggregated carbon nanotubes while varying the amount of sacrificial template material by dry pressing at 25 MPa. The results show that the characteristics of the sacrificial templates, e.g., the rigidity, directly affect the pore characteristics and accordingly determine the permeability of sintered diatomite membranes. Also, we discuss whether the largest pore sizes and average pore sizes of the sintered diatomite membranes reflect the actual permeability appropriately.

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“…Unlike classical carbon fibres, the nanotube fibres can be bent to maximum extent without breaking. Their obtained elastic modulus is 10-time higher than the modulus of high-quality bucky paper, a thin mat obtained by drying SWCNT 5 .…”

Section: Nanotube-based Fibres and Yarnsmentioning

confidence: 93%

Nanotechnology and Protective Clothing for Defence Personnel

Thilagavathi¹,

Raja²,

Kannaian³

2008

DSJ

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Defence personnel face multiple threats from different quarters, like terrorist groups and rogue nations, who own not only advanced lethal weapons but also chemical and biological warfare weapons. The present day protective clothing system used by the defence sector is vulnerable to modern weapons and also have some inherent weaknesses like high cost, bulkiness and discomfort in wearing. Nanotechnology-based materials offer a promising future in this area due to their extraordinary physical, chemical, mechanical, and electrical properties at nano-level. This paper outlines the various developments related to the application of nanotechnology in producing lightweight and comfortable protective clothing for the military personnel and also some new developments like sensor, energy storage, conductivity, and decontaminant fabrics.

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Dispersions and fibers of carbon nanotubes

Cited by 121 publications

References 22 publications

Magnetically aligned single wall carbon nanotube films: Preferred orientation and anisotropic transport properties

Magnetically aligned single wall carbon nanotube films: Preferred orientation and anisotropic transport properties

The effect of sacrificial templates on the pore characteristics of sintered diatomite membranes

Nanotechnology and Protective Clothing for Defence Personnel

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