A review on conducting carbon nanotube fibers spun via direct spinning technique

Dariyal, Pallvi; Arya, Abhishek; Singh, Bhanu Pratap; Dhakate, Sanjay R.

doi:10.1007/s10853-020-05304-z

Cited by 24 publications

(11 citation statements)

References 144 publications

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“…Currently, the most commonly used method for continuously preparing CNT fibers is FCCVD 26 . The carbon sources used in this method are mainly from petroleum fine chemicals, such as methane, ethylene, ethanol, toluene and xylene 27 . In order to meet the requirements of low carbon and environmental protection, the preparation of CNTs from biomass with a low carbon footprint as a carbon source has become a research hotspot in this field 28 , 29 .…”

Section: Introductionmentioning

confidence: 99%

Continuously processing waste lignin into high-value carbon nanotube fibers

et al. 2022

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High value utilization of renewable biomass materials is of great significance to the sustainable development of human beings. For example, because biomass contains large amounts of carbon, they are ideal candidates for the preparation of carbon nanotube fibers. However, continuous preparation of such fibers using biomass as carbon source remains a huge challenge due to the complex chemical structure of the precursors. Here, we realize continuous preparation of high-performance carbon nanotube fibers from lignin by solvent dispersion, high-temperature pyrolysis, catalytic synthesis, and assembly. The fibers exhibit a tensile strength of 1.33 GPa and an electrical conductivity of 1.19 × 105 S m−1, superior to that of most biomass-derived carbon materials to date. More importantly, we achieve continuous production rate of 120 m h−1. Our preparation method is extendable to other biomass materials and will greatly promote the high value application of biomass in a wide range of fields.

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Section: Introductionmentioning

confidence: 99%

Continuously processing waste lignin into high-value carbon nanotube fibers

et al. 2022

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“…17,18 Compared to conventional fibers, CNT fibers possess excellent properties such as large surface area, high strength, and exceptional thermal and electrical properties that arise from aligned CNTs morphologies along the fiber direction. [19][20][21] Continuous CNT fibers are generally produced via three followed methods: (I) spinning from CNT solution (wet spinning), 22 (II) drawing from super-aligned CNTs (carpet spinning), 23 and (III) direct synthesis from CNT aerogels (aerogel-spun methods) in a chemical vapor deposition (CVD) reactor. 24,25 The direct growth approach, based on self-assembled CNT aerogels via FC-CVD, has most prevailed over the other two approaches toward large-scale fiber production due to the simplicity of its spinning process, high reproducibility, economical attractiveness, manufacturing capacity, and ability to involve postspinning.…”

Section: Introductionmentioning

confidence: 99%

Microstructural design and mechanical performance of epoxy/carbon nanotube fiber composite

Seraji

Aghvami‐Panah

Ali

et al. 2022

Journal of Composite Materials

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In this paper, carbon nanotube (CNT) fiber is chemically modified through a post-spinning process with an acid treatment and epoxy infiltration. Thermo-gravimetric analysis (TGA), FTIR, and Raman spectroscopy revealed that acid treatment reduced impurities of CNT fibers and induced the formation of carboxylic functional groups on the CNTs surface that positively affect the strength; however, some defects on the surface of the nanotubes were induced that negatively affect the elastic modulus. After the epoxy infiltration procedure, it was revealed that the pores of CNT fiber were filled with epoxy resulting in improved interfacial interaction between CNT bundles either through an interlocking of polymer chains wrapping around the tubes or even by creating covalent bonds between the carboxyl-functionalized nanotubes. Comparing the mechanical performance of epoxy/CNT fibers with and without acid treatment indicated that pre-treatment of the fibers with acid before epoxy infiltration caused a reduction in the final modulus. The modulus of epoxy/CNT fiber reaches 103 N/tex and is about 20% higher than the acid-treated counterpart. Acid treatment prior to epoxy resin infiltration generates functional groups on the CNTs surface that enhance the fiber’s strength through strong reactions between epoxy chains and CNTs. On the other hand, the structural defects on CNTs imposed by acid lead to a reduction in the elastic modulus.

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“…13 Among the many followed pathways to assemble nanotubes into voluminous material, direct spinning via the single-step process of floating catalyst chemical vapor deposition (FC-CVD) technique is the most preferred route by virtue of its easy scalability and convenience. 14 In the FC-CVD process, the precursor feedstock, which involves a carbon source and catalytic constituents, is fed into a hot reaction zone via preferred carrier gases. This gas phase synthesis process allows CNT bundles to intertwine together due to van der Waals attractions to form aerogel.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%