Carbon nanotube fibers with high specific electrical conductivity: Synergistic effect of heteroatom doping and densification

Hong, Soon Hyeok; Nam, Jungtae; Park, Seunggyu; Lee, Dongju; Park, Min; Lee, Dong Su; Kim, Nam Dong; Kim, Dae‐Yoon; Ku, Bon‐Cheol; Kim, Yoong Ahm; Hwang, Jun Yeon

doi:10.1016/j.carbon.2021.08.024

Cited by 24 publications

(8 citation statements)

References 33 publications

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“…The reduced voids with the help of enhanced S decreased the distance between the internal bundles that controlled the electron transport scattering site and load transfer defect density in the composite fibers (Fig. 3d) [29].…”

Section: Resultsmentioning

confidence: 96%

Boost Up the Mechanical and Electrical Property of CNT Fibers by Governing Lyotropic Liquid Crystalline Mesophases with Aramid Polymers for Robust Lightweight Wiring Applications

et al. 2022

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Monofilament type of polyaromatic amide (PA) and carbon nanotube (CNT) composite fibers is presented. A concept of a lyotropic liquid crystal (LLC) constructed via a spontaneous self-assembly is introduced to mitigate the extremely low compatibility between PA and CNT. These approaches provide an effective co-processing route of PA and CNT simultaneously to fabricate the uniform, continuous, and reliable composite fibers through a wet-spinning. Interestingly, the addition of a small amount PA into the dope solution of CNT governs the LLC mesophase not only in a spinneret stage but also in a coagulant region. Thus, the developed PA/CNT composite fibers have the high uniaxial orientational order and the close interfacial packing compared to the pure CNT fibers. The PA/CNT composite fibers achieve the outstanding tensile strength, electrical conductivity, and electrochemical response, while maintaining a lightweight. They also exhibit the chemical, mechanical, and thermal robustness. All of these advantages can make flexible, sewable, and washable PA/CNT composite fibers ideal nanocomposite materials for use in next-generation information and energy transporting system by replacing conventional metal electrical conductors. Graphical Abstract The lyotropic liquid crystal self-assembly governed by doping the aramid polymers shows the ability to construct mechanically strong and continuous carbon nanotube-based composite fibers that can be used in the lightweight and robust electrical wiring for extreme environmental applications.

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Section: Resultsmentioning

confidence: 96%

Boost Up the Mechanical and Electrical Property of CNT Fibers by Governing Lyotropic Liquid Crystalline Mesophases with Aramid Polymers for Robust Lightweight Wiring Applications

et al. 2022

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“…In addition, an appropriate amount of PANI was located between the CNTs to increase the orientation and reduce the voids to improve the properties of the composite fibers (figure 16(j)). Until recently, methods have been introduced to improve the electrical conductivity of CNT fibers by doping method with quaternary nitrogen atom, boron-nitrogen atom or bromine [190][191][192]. These are new methods of introducing dopants at the atomic or molecular level through a post-treatment process to CNT fibers.…”

Section: Cnt-pani Composite Fibermentioning

confidence: 99%

A review of high-performance carbon nanotube-based carbon fibers

Lee,

Heo,

Kim

et al. 2023

Funct. Compos. Struct.

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With the growing importnace of high-performance carbon fibers (CFs), researches have been conducted in many applications such as aerospace, automobile and battery. Commercilalized carbon fibers have been manufactured with thermal treatment of organic precursor fibers including polyacrylonitrile (PAN), pitch and cellulose. Since conventional carbon fibers display either high tensile strength or high modulus properties due to structural limitations, it has been a chalenge to develop carbon fibers with both tensile strength and modulus. Therefore, various studies have been conducted to obtain high-performance carbon fiber. Among them, 1-dimensional carbon nanotubes (CNTs) have been used the most commonly because of high mechanical and conducting properties. In this review, the recent development of carbon nanotube fibers and carbon nanotube-based composite carbon fibers is introduced. The those fibers showed both high strength and high modulus with high conducting properties.

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“…Furthermore, we meticulously fine-tuned the crucial bundling behavior and microstructure-both pivotal factors significantly influencing the electrical and structural properties as well as EMI SE. This fine-tuning was achieved through a solvent densification process, leveraging capillary forces induced during solvent evaporation [30,31]. This strategic process notably improved the bundling behavior and densified the microstructure of the CNTSs.…”

Section: Introductionmentioning

confidence: 99%

Unique correlation between electrical, structural properties and electromagnetic shielding properties of carbon nanotube sheets

Choi,

Cho,

Park

et al. 2024

Funct. Compos. Struct.

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Correlation between electrical, structural properties and electromagnetic shielding efficiency (EMI SE) of carbon nanotube sheets (CNTSs) was investigated. Solvent densification of CNTSs led to enhancements of carbon nanotube bundling behavior and densification in the thickness direction while maintaining the areal density of the CNTSs. These structural modifications resulted in enhanced electrical properties and reduced sheet thickness by modifying the microstructure and bundling characteristics. Remarkably, contrary to conventional EMI shielding materials, the sheet resistance which reflects bundling behavior and microstructure of CNTSs, is the critical factor affecting the EMI SE of the CNTSs rather than electrical conductivity. The findings provide fundamental insights essential for the design of EMI shielding films incorporating carbon nanotubes

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Carbon nanotube fibers with high specific electrical conductivity: Synergistic effect of heteroatom doping and densification

Cited by 24 publications

References 33 publications

Boost Up the Mechanical and Electrical Property of CNT Fibers by Governing Lyotropic Liquid Crystalline Mesophases with Aramid Polymers for Robust Lightweight Wiring Applications

Boost Up the Mechanical and Electrical Property of CNT Fibers by Governing Lyotropic Liquid Crystalline Mesophases with Aramid Polymers for Robust Lightweight Wiring Applications

A review of high-performance carbon nanotube-based carbon fibers

Unique correlation between electrical, structural properties and electromagnetic shielding properties of carbon nanotube sheets

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