Proposal of Analytical Model of Tensile Property of Untwisted Carbon Nanotube Yarn and Estimation of Tensile Property of Carbon Nanotube

Shimamura, Yoshinobu; Yamaguchi, Yudai; Tohgo, Keiichiro; Fujii, Tomoyuki; Inoue, Yasuo

doi:10.2320/matertrans.mt-z2021005

Cited by 7 publications

(4 citation statements)

References 19 publications

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“…[1][2][3][4][5] In addition to the exceptional mechanical properties associated with CNT, they also possess other useful physical properties such as electrical and thermal properties. [6][7][8][9][10] However, CNT as reinforcements has been severely limited because of the difficulties in dispersing entangled CNT in polymer matrix. 7,[11][12][13] The nature of dispersion problem for CNT is rather different from other conventional reinforcement material, including spherical particles and carbon fibers, because CNT has small diameter in nanometer scale with high aspect ratio (>1000) and extremely large surface area.…”

Section: Introductionmentioning

confidence: 99%

“…Carbon nanotubes (CNT) has long been used as reinforcement material due to lightweight and exceptional mechanical properties 1–5 . In addition to the exceptional mechanical properties associated with CNT, they also possess other useful physical properties such as electrical and thermal properties 6–10 . However, CNT as reinforcements has been severely limited because of the difficulties in dispersing entangled CNT in polymer matrix 7,11–13 .…”

Section: Introductionmentioning

confidence: 99%

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Facile and efficient fabrication of carbon nanotube reinforced epoxy vitrimers through dynamic crosslinking

Li,

Liu,

Ran

2024

J of Applied Polymer Sci

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Carbon nanotubes (CNT) is an ideal candidate for reinforced epoxy vitrimer composites, however, achieving a desirable improvement of the mechanical properties is a great challenge owing to CNT is extremely easy to aggregate. In this study, well‐dispersed CNT reinforced epoxy vitrimers, namely EVD/CNT, were prepared by combining ultrasonic dispersion and dynamic crosslinking techniques, using multiple wall carbon nanotube as reinforcement filler, sebacic acid as curing agent, diglycidyl ether of bisphenol A (DGEBA) as epoxy monomer, zinc acetylacetonate as transesterification catalyst, torque rheometer (internal mixer) as dynamic crosslinking equipment. The CNT reinforced epoxy vitrimers, namely EVS/CNT, were prepared using traditional static curing method. The structure and morphology, mechanical properties and stress relaxation behavior of EVS/CNT and EVD/CNT were comparatively investigated, and the influence of CNT content on the structure and properties of EVD/CNT prepared by dynamic crosslinking method were also studied. The results indicated that dynamic crosslinking technology can stably disperse CNT into epoxy vitrimer resin matrix under continuous shear force. However, CNT experienced severe secondary agglomeration during the static curing process. When the loading amount of CNT was 2 wt%, the tensile strength and elongation at break of EVD/CNT‐2 were 3.2 times and 2.2 times higher than those of EVS/CNT‐2, respectively. The Young's modulus and glass transition temperature (Tg) of EVD/CNT‐2 (6.43 ± 1.10 MPa, 29.6°C) were also higher than those of EVS/CNT‐2 (5.46 ± 0.31 MPa, 25.4°C). Moreover, dynamic crosslinking technology greatly shortened the reaction time of CNT reinforced epoxy vitrimers, improved production efficiency and reduced reaction energy consumption, and was expected to be used for large‐scale and industrial production.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Facile and efficient fabrication of carbon nanotube reinforced epoxy vitrimers through dynamic crosslinking

Li,

Liu,

Ran

2024

J of Applied Polymer Sci

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“…Staple yarn is usually used as the basic element in most textiles, and its strength has been and is still the primary test used in the textile industry as a guide in comparing the performance efficiency of various processes in quality control, and in determining the end-use behavior of most textile products. 1 –5 In addition, with the advent of the age of smart technology, people in the textile industry want to predict accurately the strength of yarns based on known or given conditions. 6 Therefore, it is of great importance to investigate how to predict the strength of staple yarn.…”

mentioning

confidence: 99%

Computational modeling of the strength of staple yarn based on the random arrangement of fibers

Li,

Zheng,

Cao

et al. 2024

Textile Research Journal

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Staple yarn is the basic element of most textiles, and its strength affects the performance and processing efficiency of the final textile products. Meanwhile, its strength is the combination of the resistance to breakage and slip of fibers in the yarn. In this paper, a computational model is proposed to predict the strength of staple yarn. The resistance to breakage and slip of each fiber were first computed based on the random arrangement of the fibers and the idealized yarn structure, and the strength was computed by identifying fiber breakage or slip in the yarn breakage zone. The reliability and applicability of the model were verified on viscose and polyester ring-spun staple yarns. The results show that the mean error of prediction is mostly less than 5%, indicating that the model has good accuracy and applicability; and the correlation coefficient R is mostly greater than 0.95, indicating that the predicted strength is in good agreement with the tested strength.

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“…The breaking performance of the yarn is not only a critical quality index for evaluating yarns, it is also a crucial aspect that affects the characteristics of fabrics and clothing. [4][5][6][7] The yarn proposed in this study was composed of a core filament, staple yarn, and wrapped filament. Therefore, the tensile fracture process of this composite yarn was complicated.…”

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confidence: 99%

Viscoelastic tensile model of core/wrapped composite yarn with double filament

Yang

Zhang

et al. 2023

Textile Research Journal

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Viscoelastic models are typically employed to investigate the mechanical properties of yarn. In this study, a viscoelastic model was developed to predict the tensile stress–strain relationship of a core/wrapped composite yarn with double filaments. The tensile properties of the yarn were tested, and various stages of the tensile curve were analyzed. Moreover, based on the tensile fracture characteristics, a five-element nonlinear viscoelastic model comprising Kelvin element, Maxwell element, and linear springs was established. Furthermore, the tensile properties of the composite yarns were simulated and calculated using the developed model. Additionally, the stress–strain relationship was fitted using a polynomial on the basis of the established model. The results reveal that the tensile fracture curve of the composite yarn comprises three stages. They are a small strain linear stage, a large strain stage, and a strength fluctuation stage. The viscoelastic tensile model can decently explain the three-stage stress–strain characteristics of the composite yarn tensile curve. The theoretical results were consistent with the experimental results, and the correlation coefficient was greater than 0.999. Based on the results, the proposed model can be employed with high accuracy to predict the tensile properties of a core/wrapped composite yarn with a double filament.

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Proposal of Analytical Model of Tensile Property of Untwisted Carbon Nanotube Yarn and Estimation of Tensile Property of Carbon Nanotube

Cited by 7 publications

References 19 publications

Facile and efficient fabrication of carbon nanotube reinforced epoxy vitrimers through dynamic crosslinking

Facile and efficient fabrication of carbon nanotube reinforced epoxy vitrimers through dynamic crosslinking

Computational modeling of the strength of staple yarn based on the random arrangement of fibers

Viscoelastic tensile model of core/wrapped composite yarn with double filament

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