Polymer Coating of Carbon Nanotube Fibers for  Electric Microcables

Alvarez, Noe T.; Ochmann, Timothy; Kienzle, Nicholas; Ruff, Brad; Haase, Mark; Hopkins, Tracy; Pixley, Sarah K.; Mast, David; Schulz, Mark J.; Shanov, Vesselin

doi:10.3390/nano4040879

Cited by 39 publications

(34 citation statements)

References 37 publications

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“…However, the surface deposition, may also be the desired situation. An example may be the coating of the fibers/films with polymers with the aim of insulating the fibers electrically, or to encapsulate the species in the hybrid structures or to form a dielectric layer in capacitors [20,[62][63][64]. Our recent work has reported that the CNT fibers for smart textile applications may be coated with textile polymers that enable the washing of the fibers as well as their colouring and texturization [65].…”

Section: Infiltration and Coatingmentioning

confidence: 99%

Spun Carbon Nanotube Fibres and Films as an Alternative to Printed Electronic Components

et al. 2020

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Current studies of carbon nanotubes have enabled both new electronic applications and improvements to the performance of existing ones. Manufacturing of macroscopic electronic components with this material generally involves the use of printed electronic methods, which must use carbon nanotube (CNT) powders. However, in recent years, it has been shown that the use of ready-made self-standing macroscopic CNT assemblies could have considerable potential in the future development of electronic components. Two examples of these are spun carbon nanotube fibers and CNT films. The following paper considers whether these spun materials may replace printed electronic CNT elements in all applications. To enable the investigation of this question some practical experiments were undertaken. They included the formation of smart textile elements, flexible and transparent components, and structural electronic devices. By taking this approach it has been possible to show that CNT fibres and films are highly versatile materials that may improve the electrical and mechanical performance of many currently produced printed electronic elements. Additionally, the use of these spun materials may enable many new applications and functionalities particularly in the area of e-textiles. However, as with every new technology, it has its limitations, and these are also considered.

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Section: Infiltration and Coatingmentioning

confidence: 99%

Spun Carbon Nanotube Fibres and Films as an Alternative to Printed Electronic Components

et al. 2020

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“…However, the CNT yarns just like most fibers, are highly porous [19][20][21][22][23][24]. Polymers with relatively high molecular weight may infiltrate the fiber but not the inner structure or fiber alignment [25]. Low molecular weight polymer chains will infiltrate the fiber, expand the bundle and intercalate between nanotubes thus blocking the load and chargecarrying channels reducing significantly the piezoresistivity.…”

Section: Piezoresistive Response Under Tensionmentioning

confidence: 99%

Piezoresistive Response of Integrated CNT Yarns under Compression and Tension: The Effect of Lateral Constraint

Anike¹,

Le²,

Brodeur³

et al. 2017

Preprint

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Carbon nanotube (CNT) yarns are fiber-like materials that exhibit excellent mechanical, electrical and thermal properties. More importantly, they exhibit a piezoresistive response that can be tapped for sensing purposes. The objective of this study is to determine experimentally the piezoresistive response of CNT yarns that are embedded in a polymeric medium while subjected to either compression or tension, and compare it with that of the free or unconstrained CNT yarns. The rationale for this study is the need to know the piezoresistive response of the CNT yarn while in a medium, which provides a lateral constraint to the CNT yarn thus mimicking the response of integrated CNT yarn sensors. The experimental program includes the fabrication of samples and their electromechanical characterization. The CNT yarns are integrated in polymeric beams and subjected to four-point bending allowing the determination of their response under tension and compression. The electromechanical data from a combined Inductance-Capacitance-Resistance (LCR) device and a mechanical testing system were used to determine the piezoresistive response of the CNT yarns. At a strain rate of 0.006 min -1 , the gauge factors obtained under tension for a maximum strain of 0.1 % is ~ 29.3 which is higher than ~ 21.2 obtained under compression. The CNT yarn sensor exhibited strain rate dependence with a gauge factor of approximately 23.0 at 0.006 min -1 , in comparison to 19.0 and 1.3, which were obtained at 0.0005 min -1 and 0.003 min -1 , respectively. There is a difference of up to two orders of magnitude in the sensitivity of the constrained CNT yarn under bending with respect to that of the free CNT yarn under uniaxial tension. However, the difference becomes smaller when the constrained CNT yarn was tested under uniaxial tension. This data and information will be used for future modeling efforts and to study the phenomena that occur when CNT yarns are integrated in polymeric and composite materials and structures.

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“…However, the CNT yarns, just like most fibers, are highly porous [19][20][21][22][23][24]. Polymers with relatively high molecular weight may infiltrate the fiber but not the inner structure or affect the fiber alignment [25]. Low molecular weight polymer chains will infiltrate the fiber, expand the bundle and intercalate between nanotubes, thus blocking the load and charge-carrying channels, reducing significantly the piezoresistivity.…”

Section: Piezoresistive Response Under Tensionmentioning

confidence: 99%

Piezoresistive Response of Integrated CNT Yarns under Compression and Tension: The Effect of Lateral Constraint

Anike

Brodeur

et al. 2017

View full text Add to dashboard Cite

Carbon nanotube (CNT) yarns are fiber-like materials that exhibit excellent mechanical, electrical and thermal properties. More importantly, they exhibit a piezoresistive response that can be tapped for sensing purposes. The objective of this study is to determine experimentally the piezoresistive response of CNT yarns that are embedded in a polymeric medium while subjected to either tension or compression, and compare it with that of the free or unconstrained CNT yarns. The rationale is the need to know the piezoresistive response of the CNT yarn while in a medium, which provides a lateral constraint to the CNT yarn, thus mimicking the response of integrated CNT yarn sensors. The experimental program includes the fabrication of samples and their electromechanical characterization. The CNT yarns are integrated in polymeric beams and subjected to four-point bending, allowing the determination of their response under tension and compression. The electromechanical data from a combined Inductance-Capacitance-Resistance (LCR) device and a mechanical testing system were used to determine the piezoresistive response of the CNT yarns. At a strain rate of 0.006 min −1 , the gauge factor obtained under tension for a maximum strain of 0.1% is 29.3 which is higher than~21.2 obtained under compression. The CNT yarn sensor exhibited strain rate dependence with a gauge factor of approximately 23.0 at 0.006 min −1 , in comparison to 19.0 and 1.3, which were obtained at 0.0005 min −1 and 0.003 min −1 , respectively. There is a difference of up to two orders of magnitude in the sensitivity of the constrained CNT yarn under bending with respect to that of the free CNT yarn under uniaxial tension. However, the difference becomes smaller when the constrained CNT yarn was tested under uniaxial tension. This data and information will be used for future modeling efforts and to study the phenomena that occur when CNT yarns are integrated in polymeric and composite materials and structures.

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Polymer Coating of Carbon Nanotube Fibers for Electric Microcables

Cited by 39 publications

References 37 publications

Spun Carbon Nanotube Fibres and Films as an Alternative to Printed Electronic Components

Spun Carbon Nanotube Fibres and Films as an Alternative to Printed Electronic Components

Piezoresistive Response of Integrated CNT Yarns under Compression and Tension: The Effect of Lateral Constraint

Piezoresistive Response of Integrated CNT Yarns under Compression and Tension: The Effect of Lateral Constraint

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