Mechanical and electrical properties of the PA6/SWNTs nanofiber yarn by electrospinning

Li, Jie; Tian, Long; Pan, Ning; Pan, Zhi Juan

doi:10.1002/pen.23705

Cited by 34 publications

(16 citation statements)

References 39 publications

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“…However, after a proper twist setting process, the untwisting and tangling will reduce or disappear from the yarn. Therefore, the twist setting effect could be simply characterized by the existence of the untwisting and tangling in the yarn [21,22,30]. In this paper, the twist setting process of the plied yarns with four filaments and 2500 tpm was conducted at temperatures of 70, 80, and 90°C for 20, 30, and 40 min, respectively, and the twist setting effects are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

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Fabrication of continuous electrospun nanofiber yarns with direct 3D processability by plying and twisting

2015

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Nanofiber yarns were continuously manufactured by a homemade plying and twisting device using nanofiber filaments, and the structures of the nanofibers were examined. A twist setting process was performed on the yarns following the plying and twisting process, and the influences of temperatures and times on twist setting effects and mechanical properties of the as-treated yarns were studied. Meanwhile, the effects of plies and twists on structures and mechanical properties of the yarns were also investigated. The results show that the structures of the nanofibers were demonstrated to have a skin-core structure, and the optimum twist setting temperature and time were determined to be 90°C and 30 min, respectively. With more filaments plied into a yarn, the measured values of yarn diameters were all smaller than the theoretical ones, the yarn-diameter uniformities improved, the nanofiber diameters decreased, and the alignment degree of nanofibers along the twist direction (ADT) improved. The breaking stress and initial modulus increased when the number of plies increased from 1 to 4, but when more than four filaments were plied into a yarn, both of them decreased, while the breaking strain increased. With increasing yarn twists, both nanofiber and yarn diameters decreased, but the ADT increased. The breaking stress and initial modulus initially increased as the twists increased to 2500 twists per meter before decreasing, while the breaking strain kept increasing. Meanwhile, the breaking strength of the plied yarns was considerably greater than that of the non-plied ones, which ensured the possibility of subsequent 3D manufacturing.

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Section: Resultsmentioning

confidence: 99%

“…The concentration of the PA6 solution was 25 wt%. The bath, the 0.5 wt% Peregal O solution, was prepared by dissolving Peregal O into deionized water at room temperature [21].…”

Section: Experimental Materialsmentioning

confidence: 99%

Fabrication of continuous electrospun nanofiber yarns with direct 3D processability by plying and twisting

2015

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“…The bath solution was prepared by dissolving Peregal O (Jiangsu Jiafeng Chemical Co. Ltd.) into deionized water at room temperature, and the concentration of Peregal O solution was 0.5 wt% [21].…”

Section: Methodsmentioning

confidence: 99%

“…Among them, liquid-bath electrospinning method is regarded as one of the most efficient ways to produce nanofiber filaments, due to its better stability, continuity and applicability. Smit [16], Khil [19], and Pan et al [20,21] have successfully electrospun nanofiber filaments continuously by the liquid-bath electrospinning technique. However, there is no record about the forming process and mechanism of nanofiber filaments fabricated by liquid-bath electrospinning method.…”

Section: Introductionmentioning

confidence: 99%

Nanofiber Filaments Fabricated by a Liquid-Bath Electrospinning Method

Tian¹,

Yan²,

Li³

et al. 2018

Novel Aspects of Nanofibers

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In order to investigate the forming process of multi-needle liquid-bath electrospun nanofiber filaments, nanofiber filaments were prepared using the multi-needle liquidbath electrospinning method in this chapter. The effect of auxiliary electrode on jet state, and bundling and drawing processes of nanofibers were studied. The results show that the forming process of nanofiber filaments was mainly influenced by electrostatic field interference, bundling process, and drawing process, including two processes: forming process of as-spun nanofiber filaments and post-drawing process. In the forming process of as-spun nanofiber filaments, when the auxiliary electrode was added, the electrostatic field interference between needles reduced, inducing the decrease of jet offsets and the enhancement of Taylor cone and jet stability, and nanofibers with skin-core structure were finally deposited on the bath in good condition. The bundling process of nanofiber filament was divided into three processes: wet process, wet-dry process, and dry process; the structure transformation of nanofiber filaments mainly occurred in the wet process. In the post-drawing process, the crystallinity and alignment degree of nanofibers increased, and nanofiber diameter decreased. The initial modulus and breaking stress of filaments increased while the breaking strain of filaments decreased. Finally, nanofiber filaments were produced with better structures and properties.

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“…Different electrospinning methods were applied to produce nanofiber yarns such as self‐bundling, dynamic liquid support system, using pairs of oppositely charged nozzles, funnel‐shape collector, and rotating collector . Electrospun yarns have high potential to be used in applications such as tissue engineering and artificial blood vessels, owing to their excellent characteristics such as high strength, high porosity, and small diameter and the large specific surface area to mass ratio of their constituent fibres . As a result, the study of the wicking behavior would be valuable in the application of these nanofibrous structures in certain areas, such as sutures, sensors, and medical scaffolds.…”

Section: Introductionmentioning

confidence: 99%

Effect of fatigue loading on wicking properties of polyamide 66 nanofiber yarns

Mooneghi

Gharehaghaji

Hosseini‐Toudeshky

et al. 2018

J of Applied Polymer Sci

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The wicking phenomenon is of prime importance with regards to biomedical applications of nanofiber yarns such as suture yarns and tissue scaffolds. In such applications, the yarns are usually subjected to cyclic tensile forces and biological tensile stresses. There is a lack of science behind the effect of fatigue on wicking properties of nanofiber yarns and this work aims at exploring this venue. Wicking properties of polyamide 66 nanofiber yarns are investigated by tracing the color change in the yarn structure resulting from pH changes during the capillary rise of distilled water. Results show that applying cyclic loading increases equilibrium wicking height in the Lucus–Washburn equation, which is attributed to changes in the overall pore structure in the cyclic loaded yarn. The likely causes of these changes are studied by scanning electron microscope, which reveals disentangled, more or less aligned and parallel nanofibers with a smaller radius in the nanofibrous structure. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47206.

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Mechanical and electrical properties of the PA6/SWNTs nanofiber yarn by electrospinning

Cited by 34 publications

References 39 publications

Fabrication of continuous electrospun nanofiber yarns with direct 3D processability by plying and twisting

Fabrication of continuous electrospun nanofiber yarns with direct 3D processability by plying and twisting

Nanofiber Filaments Fabricated by a Liquid-Bath Electrospinning Method

Effect of fatigue loading on wicking properties of polyamide 66 nanofiber yarns

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