Mild acid-based surfactant-free solutions of single-walled carbon nanotubes: Highly viscous, less toxic, and humidity-insensitive solutions

Seo, Su Bin; Lee, Jung-Eun; Ju, Hyejin; Kim, Hyo Jeong; Eom, Youngho; Chae, Han Gi

doi:10.1016/j.cej.2022.137983

Cited by 8 publications

(2 citation statements)

References 52 publications

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“…Other methods have been introduced to replace the CSA. Seo et al reported the CNT dispersion up to a spinnable concentration of CNT dopes is possible using PAA as the solvent [194], which is less sensitive to humidity and easier to handle. PAA is reported to disperse CNTs effectively, even at high concentrations, and showed a liquid crystal phase from 0.1 to >1.0 wt% concentrations.…”

Section: Discussionmentioning

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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Section: Discussionmentioning

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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“…An azimuthal scan of the integrated spectra at δ = 0°–180° was used to calculate f . The obtained intensity ( I ) and azimuthal angle ( δ ) were substituted into equation 29

f = \frac{3 < \cos^{2} δ > - 1}{2}, where < \cos^{2} δ > = \frac{\int_{0}^{π / 2} I \cos^{2} δ \sin δ d δ}{\int_{0}^{π / 2} I sin δ d δ}

…”

Section: Methodsmentioning

confidence: 99%

Ultra‐strong and biodegradable nanocomposite fibers of poly(butylene adipate‐co‐terephthalate)/cellulose nanocrystal prepared by dry‐jet wet spinning

Lee,

Kim,

Kim

et al. 2024

Polymer Composites

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Fiber‐based products constitute a significant portion of plastic waste and cause environmental damage. In particular, discarded sanitary masks and fishing gear disintegrate into microfiber plastics, posing a significant threat to human health and ecosystems. In this study, we developed robust biodegradable nanocomposite fibers of poly(butylene adipate‐co‐terephthalate) (PBAT)/cellulose nanocrystals (CNCs) (1 and 2 wt%) through dry‐jet wet spinning, by using dimethyl sulfoxide (DMSO) as a common solvent. The control PBAT fibers exhibit remarkable mechanical performance with tensile strength and toughness of 160.0 MPa and 43.0 MJ m−3, respectively. CNC addition has a toughening effect with slightly reduced strength but enhanced toughness (148.8 MPa and 69.0 MJ m−3, respectively, for 2 wt% CNC); their mechanical performances are superior to those of previously reported PBAT‐based materials. The remarkable performance of the fibers is attributed to a highly oriented structure with a total draw ratio of 15 after post‐hot drawing. The control and nanocomposite fibers exhibit spot‐like patterns in 2D wide‐angle x‐ray diffraction patterns with Herman's orientation factor of 0.54–0.58. The theoretical Hansen solubility parameter confirmed the poor chemical affinity between the PBAT and CNC. Nonetheless, the rheological characterization revealed that well‐dispersed CNCs with DMSO produced a physical network in the PBAT matrix, resulting in the toughening effect. Such robust nanocomposite fibers consisting of fully biodegradable components are promising alternatives to nondegradable nylon and polyester fibers.Highlights Robust biodegradable nanocomposite fibers of PBAT and CNC are prepared. Nanocomposite fibers are dry‐jet wet spun using DMSO as a common solvent. PBAT fibers exhibit strength and toughness of 160.0 MPa and 43.0 MJ m−3. 2 wt% CNC toughens the PBAT fibers with an enhanced toughness of 69.0 MJ m−3. Rheological results confirm the toughening effect of well‐dispersed CNC in PBAT.

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