Carbon nanotube-reduced graphene oxide fiber with high torsional strength from rheological hierarchy control

Eom, Wonsik; Lee, Eunsong; Lee, Sang Hoon; Sung, Tae Hyun; Clancy, Adam J.; Lee, Wonjun; Han, Tae Hee

doi:10.1038/s41467-020-20518-0

Cited by 36 publications

(23 citation statements)

References 48 publications

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“…For example, natural materials can possess excellent mechanical properties although they only contain simple building blocks, which can be ascribed to their anisotropic architectures [ 14 , 15 ]. Inspired by the nature, researchers have explored some methods, such as flow-assisted organization [ 16 ], directional freeze-casting [ 17 ], and spinning with special nozzles or channels [ 18 – 20 ], to optimize the orientation of the building blocks while assembling them into macrofibers or films. The tensile strength or modulus of the obtained materials, such as cellulose fibers [ 16 ], polyvinyl alcohol hydrogel [ 17 ], graphene fiber [ 18 ], MXene fiber [ 19 ], and carbon nanotube fiber [ 20 ], could be significantly improved.…”

Section: Introductionmentioning

confidence: 99%

“…Inspired by the nature, researchers have explored some methods, such as flow-assisted organization [ 16 ], directional freeze-casting [ 17 ], and spinning with special nozzles or channels [ 18 – 20 ], to optimize the orientation of the building blocks while assembling them into macrofibers or films. The tensile strength or modulus of the obtained materials, such as cellulose fibers [ 16 ], polyvinyl alcohol hydrogel [ 17 ], graphene fiber [ 18 ], MXene fiber [ 19 ], and carbon nanotube fiber [ 20 ], could be significantly improved. Meanwhile, postprocessing strategies, such as electric current aligning [ 21 ] and stretching [ 22 , 23 ], can also be used to improve the orientation of the building blocks for reinforcing purposes.…”

Section: Introductionmentioning

confidence: 99%

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Mechanically Reinforced Silkworm Silk Fiber by Hot Stretching

et al. 2022

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Silkworm silk, which is obtained from domesticated Bombyx mori (B. mori), can be produced in a large scale. However, the mechanical properties of silkworm silk are inferior to its counterpart, spider dragline silk. Therefore, researchers are continuously exploring approaches to reinforce silkworm silk. Herein, we report a facile and scalable hot stretching process to reinforce natural silk fibers obtained from silkworm cocoons. Experimental results show that the obtained hot-stretched silk fibers (HSSFs) retain the chemical components of the original silk fibers while being endowed with increased β-sheet nanocrystal content and crystalline orientation, leading to enhanced mechanical properties. Significantly, the average modulus of the HSSFs reaches 21.6±2.8 GPa, which is about twice that of pristine silkworm silk fibers (11.0±1.7 GPa). Besides, the tensile strength of the HSSFs reaches 0.77±0.13 GPa, which is also obviously higher than that of the pristine silk (0.56±0.08 GPa). The results show that the hot stretching treatment is effective and efficient for producing superstiff, strong, and tough silkworm silk fibers. We anticipate this approach may be also effective for reinforcing other natural or artificial polymer fibers or films containing abundant hydrogen bonds.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanically Reinforced Silkworm Silk Fiber by Hot Stretching

et al. 2022

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“…4,17 Shear-aligning methods are a promising approach to obtain bers and lms that have highly aligned and densied structure. 18 Flow-induced shear stress arranges particles in the ow direction. The methods are applicable to various systems regardless of their chemistry, [19][20][21] and are advantageous in mass production; for example, the method of extrusion has been widely used in industry.…”

Section: Introductionmentioning

confidence: 99%

Investigation of shear-induced rearrangement of carbon nanotube bundles using Taylor–Couette flow

et al. 2021

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“…[10] With the merits of shear force triggered orientation of the nanofibers during the wet-spinning process, wet-spun hybrid fibers hold promise to achieve highly compact hybrid materials assembly with optimized active material loading ratios, and strong interfacial adhesion. [11] Despite these advances, only a few studies have attempted to construct wet-spun hybrid fiber electrodes for Zn-ion fiber battery. The difficulty lies in realizing splendid spinnability of the hybrid nanomaterial spinning dope, which is strictly determined by rheological feature.…”

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confidence: 99%

Manipulating Hierarchical Orientation of Wet‐Spun Hybrid Fibers via Rheological Engineering for Zn‐Ion Fiber Batteries

Zhou

et al. 2022

Advanced Materials

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receiving great attention for serving as power source of wearable electronics. [1] 1D fiber batteries can be directly woven into commercial textiles to solve energy anxiety. [2] Zn-ion aqueous batteries (ZIB) are an ideal electrochemical charge storage system for constructing fiber batteries, owing to their inherent safety, efficient Zn-ion transport dynamics, low cost (≈$ 65 kW −1 h vs ≈$ 300 kW −1 h for Li-ion battery), facile fabrication, and excellent volumetric capacity (5855 vs 2061 mAh cm −3 for Li) of the Zn metal anode. [3] These features have stimulated emerging research interests in developing Zn-ion fiber batteries. [4] For instance, Zhi et al. fabricated a Zn-ion fiber battery with α-MnO 2 as the cathode and Zn metal decorating two double helix carbon nanotube (CNT) fibers as the anode, in which a ZIB yarn woven into textile was demonstrated. However, in comparison with thin-film counterparts, the limited specific capacity of 302.1 mAh g −1 and volumetric energy density of 53.8 mWh cm −3 still hinder its broad application in providing long-term power for wearable electronics due to the insufficient active materials loading via the dip-coating strategy. [4c] In contrast to planar flexible batteries, fiber electrodes are of vital importance in determining energy storage performance and flexibility of the final fibrous ZIB. [5] Generally, fiber electrode fabrication strategies can be classified into two categories: i) surface coating/in situ growth that deposits active materials onto conductive fiber substrates [6] and ii) wet-spinning via incorporating target materials [7] (e.g., conducting polymers or metal oxides) with carbon-based nanomaterials (e.g., graphene or CNTs). Although surface-coating/in situ growth are feasible approaches to construct fiber electrodes through dip-coating or electrochemical deposition, the thus-fabricated electrodes so far only show limited active material loading and inadequate interfacial adhesion, which tends to create detrimental cracks or even severe abscission after repeated configuration deformation (e.g., bending, twisting, and stretching). These drawbacks significantly constrain the initial specific capacity, mechanical durability and long-term electrochemical stability. [8] Among the prevailing strategies, wet-spinning has been affirmed as a fascinating approach to surmount the aforementioned issues encountered with surface coated fiber electrodes. [9] Wet-spinning is a promising strategy to fabricate fiber electrodes for real commercial fiber battery applications, according to its great compatibility with large-scale fiber production. However, engineering the rheological properties of the electrochemical active materials to accommodate the viscoelasticity or liquid crystalline requirements for continuous wet-spinning remains a daunting challenge. Here, with entropy-driven volume-exclusion effects, the rheological behavior of vanadium pentoxide (V 2 O 5 ) nanowire dispersions is regulated through introducing 2D graphene oxide (GO) flakes in an optim...

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Carbon nanotube-reduced graphene oxide fiber with high torsional strength from rheological hierarchy control

Cited by 36 publications

References 48 publications

Mechanically Reinforced Silkworm Silk Fiber by Hot Stretching

Mechanically Reinforced Silkworm Silk Fiber by Hot Stretching

Investigation of shear-induced rearrangement of carbon nanotube bundles using Taylor–Couette flow

Manipulating Hierarchical Orientation of Wet‐Spun Hybrid Fibers via Rheological Engineering for Zn‐Ion Fiber Batteries

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