Fabrication and mechanical properties of carbon nanotube yarns spun from ultra-long multi-walled carbon nanotube arrays

Ghemes, Adrian; Minami, Yoshitaka; Muramatsu, J.; Okada, Morihiro; Mimura, Hidenori; Inoue, Yasuo

doi:10.1016/j.carbon.2012.05.043

Cited by 84 publications

(67 citation statements)

References 22 publications

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“…This has prompted many studies on the optical properties of single nanowires over a long time; however, no applications have been presented owing to the difficulties in fabricating ordered nanostructures. In recent years, a technique for spinning a carbon nanotube (CNT) sheet with the CNTs aligned in one direction from a vertically grown CNT forest has been introduced . Thus, various devices, such as touch screens, electrodes, polarizers, and speakers based on CNT sheets have been reported .…”

supporting

confidence: 91%

Flexible and Thermally Stable Optical Polarizers Based on Highly Aligned Carbon Nanotube Sheets for the Visible Spectral Range

Jung

Noh

Suh

et al. 2018

Adv Materials Technologies

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Development of new types of optical components applicable to flexible and stretched substrates is essential for designing innovative display platforms for wearable and outdoor applications. Here, a novel polarizer based on highly aligned macroscopic carbon nanotube (CNT) sheets with flexibility, thermal stability, high polarization efficiency, and high transmittance is introduced. Since the conductive multiwalled CNTs are essentially held together by van der Waals forces, wire‐grid‐type polarizers of well‐aligned conductive CNTs in one direction can be developed without complex and difficult manufacturing processes. The CNT sheet exhibits uniform polarization efficiency in the visible light region and maintains its polarization characteristics without physical deformation even at temperatures greater than 100 °C. Moreover, the transmission according to the angle formed by two CNT sheets follows the Malus law, similar to a typical polarizer. Finally, the applicability of the CNT sheet polarizer on a commercial liquid crystal displays monitor is demonstrated.

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supporting

confidence: 91%

Flexible and Thermally Stable Optical Polarizers Based on Highly Aligned Carbon Nanotube Sheets for the Visible Spectral Range

Jung

Noh

Suh

et al. 2018

Adv Materials Technologies

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“…However, it should be noted that the silicon coating on the VACNTs remained intact even after compaction by cold-pressing followed by the scribing action on the copper foil. This is possibly due to the strong Van der Waals forces that hold the vertically aligned carbon nanotubes together similar to what is seen in the CNT yarns made by the dry spinning methods 22 . In this case, the scribing action of the Si-CNT pressed pellet on the copper foil enables the individual silicon coated carbon nanotubes to glide over each other adhering physically to the surface of the copper foil similar to the published report 23 .…”

Section: Resultsmentioning

confidence: 68%

“…However, due to the advancement in power electronics and demand for longer driving range in electric vehicles, batteries possessing much higher energy, power density and cycle life are critically needed. Recently, silicon has garnered enormous interest as an alternative anode to graphite due to its ability to alloy with lithium at electrode potentials similar to that of graphite, forming a highly lithiated phase, Li 22 Si 5 , having a theoretical capacity of 4200 mAh/g, which is ten-fold greater than that of graphite (theoretical capacity: 372 mAh/g). However, the formation of this lithiated phase is associated with a colossal volume expansion (>300%) leading to pulverization of the active material contributing to a corresponding large capacity fade 2 .…”

Section: Introductionmentioning

confidence: 99%

Scribable multi-walled carbon nanotube-silicon nanocomposites: a viable lithium-ion battery system

et al. 2015

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A novel electrode fabrication technique involving a manual scribing action of vertically aligned silicon coated multiwall carbon nanotubes (VASCNTs) on a copper foil have been developed as a viable approach to Li-ion battery electrodes. The scribed electrodes were prepared without the use of any conductive additives and binders, and they were directly assembled in a coin cell. These 'binder-less' scribed Si-CNT electrodes exhibited a very high discharge capacity in excess of 3000 mA h g(-1) and a low first cycle irreversible loss (FIR) (19%). In addition, the electrodes also showed good cyclability with capacity retention of 76% at the end of 50 cycles corresponding to a fade rate of 0.48% loss per cycle rendering the technique attractive for suitable Li-ion applications.

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“…Random orientation, aggregation, and low content (a few vol.%) of CNTs were obstacles to overcome [1]. In recent years, multi-walled carbon nanotubes (MWCNTs) that can be spun into a yarn were developed [2][3][4][5][6][7][8] and used as a preform of aligned MWCNT-reinforced polymer composites to achieve good mechanical properties [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…This study aims to evaluate the stress distribution of MWCNTs using Raman spectroscopy and to investigate the interfacial shear stress between the MWCNT and epoxy. To this end, ultralong and aligned MWCNTs [5,8] are used to achieve multi-point measurement of Raman spectra in MWCNTs. This study is organized as follows.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of interfacial shear stress between multi-walled carbon nanotubes and epoxy based on strain distribution measurement using Raman spectroscopy

Yashiro

Sakaida

Shimamura

et al. 2016

Composites Part A: Applied Science and Manufacturing

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This study investigated the stress recovery of aligned multi-walled carbon nanotubes (MWCNTs) embedded in epoxy using Raman spectroscopy, and evaluated interfacial shear stress between MWCNTs and epoxy using shear-lag analysis. To this end, ultralong aligned MWCNTs (3.8 mm long) were embedded in epoxy to obtain Raman spectra at multiple points along the MWCNTs. Downshift of the G'-band due to tensile strain was measured from the nanotube end to the center, and the strain distribution of embedded MWCNTs was evaluated successfully. Interfacial shear stress was then estimated by minimizing the error between the shear-lag analysis and measured strain distribution. The maximum interfacial shear stress between the embedded MWCNTs and epoxy was 10.3-24.1 MPa at the failure strain of aligned MWCNT-reinforced epoxy composites (0.46% strain). Furthermore, the interfacial shear stress

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Fabrication and mechanical properties of carbon nanotube yarns spun from ultra-long multi-walled carbon nanotube arrays

Cited by 84 publications

References 22 publications

Flexible and Thermally Stable Optical Polarizers Based on Highly Aligned Carbon Nanotube Sheets for the Visible Spectral Range

Flexible and Thermally Stable Optical Polarizers Based on Highly Aligned Carbon Nanotube Sheets for the Visible Spectral Range

Scribable multi-walled carbon nanotube-silicon nanocomposites: a viable lithium-ion battery system

Evaluation of interfacial shear stress between multi-walled carbon nanotubes and epoxy based on strain distribution measurement using Raman spectroscopy

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