Evaluation of Crimping as a Termination Technique for Carbon Nanotube Macro-Structures

Hemond, Jessica; Martens, Rod; Loyd, Andrew

doi:10.1109/holm.2012.6336562

Cited by 1 publication

(1 citation statement)

References 9 publications

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“…Macroscopic assemblies of carbon nanotubes (CNTs) in wire format are being considered for a variety of applications including power and data transmission for both aerospace and terrestrial scenarios. − Benefits for adoption of CNT wires include superior flexure tolerance, weight savings, and corrosion resistance over their traditionally used metal counterparts . For example, CNT conductors have been successfully used as metal replacements in RG-402 and RG-58 coaxial data transmission cables. ,, Improvements in the attenuation of these cables derived from enhanced bulk CNT electrical conductivity are due to CNT type selection and chemical doping.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electrical Conductivity in Extruded Single-Wall Carbon Nanotube Wires from Modified Coagulation Parameters and Mechanical Processing

Bucossi¹,

Cress

Schauerman³

et al. 2015

ACS Appl. Mater. Interfaces

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Single-wall carbon nanotubes (SWCNTs) synthesized via laser vaporization have been dispersed using chlorosulfonic acid (CSA) and extruded under varying coagulation conditions to fabricate multifunctional wires. The use of high purity SWCNT material based upon established purification methods yields wires with highly aligned nanoscale morphology and an over 4× improvement in electrical conductivity over as-produced SWCNT material. A series of eight liquids have been evaluated for use as a coagulant bath, and each coagulant yielded unique wire morphology based on its interaction with the SWCNT-CSA dispersion. In particular, dimethylacetamide as a coagulant bath is shown to fabricate highly uniform SWCNT wires, and acetone coagulant baths result in the highest specific conductivity and tensile strength. A 2× improvement in specific conductivity has been measured for SWCNT wires following tensioning induced both during extrusion via increased coagulant bath depth and during solvent evaporation via mechanical strain, over that of as-extruded wires from shallower coagulant baths. Overall, combination of the optimized coagulation parameters has yielded acid-doped wires with the highest reported room temperature electrical conductivities to date of 4.1-5.0 MS/m and tensile strengths of 210-250 MPa. Such improvements in bulk electrical conductivity can impact the adoption of metal-free, multifunctional SWCNT materials for advanced cabling architectures.

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