Electrospinning Mechanism of Nanofiber Yarn and Its Multiscale Wrapping Yarn

Abstract

To analyze the feasibility of electrospinning nanofiber yarn using a wrapping yarn forming device, electrospun nanofiber-wrapped yarns and multiscale yarns were prepared by self-made equipment. The relationship between the surface morphology and properties of yarn and its preparation process was studied. The process parameters were adjusted, and it was found that some nanofibers formed Z-twisted yarns, while others showed exposed cores. To analyze the forming mechanism of electrospun nanofiber-wrapped yarn, the concept of winding displacement difference in the twisted yarn core A was introduced. The formation of nanofiber-wrapped structural yarns was discussed using three values of A. The starting point of each twist was the same position when A = 0 with a constant corner angle β. However, the oriented nanofiber broke or was pulled out from the gripping point when it was twisted, and it appeared disordered. The forming process of electrospun nanofiber-wrapped yarn displayed some unique phenomena, including the emission of directional nanofibers during collection, fiber non-continuity, and twist angle non-uniformity. The conclusions of this research have theoretical and practical value to guide the industrial preparation of nanofiber yarns and their wrapped yarns.

A Review on Current Nanofiber Technologies: Electrospinning, Centrifugal Spinning, and Electro‐Centrifugal Spinning

“…f) Reproduced with permission. [ 5 ] Copyright 2021 by the authors. Licensee MDPI, Basel, Switzerland.…”

“…Instead of nonwoven fabric collected on a flat pate, nanofiber yarn is fabricated by a rotating funnel [ 5 ] (Figure 4f). It was reported that the nanofiber yarn can have high strength in combination with high toughness.…”

“…Currently, most researchers are using in-house built electrospinning devices to produce nanofibers thanks to their low cost and easy assembling features. [4][5][6][7][8][9][10][11][12][13] In addition, brand-new electrospinning-based technologies gradually emerged from the beginning of this century to extend the processable materials as well as to improve the complexity of the construction.…”

“…Copyright 2017, Elsevier B.V. All rights reserved. f) Reproduced with permission [5]. Copyright 2021 by the authors.…”

Production of Modified Composite Nanofiber Yarns with Functional Particles

“…The formation of composite DC spinning yarns has been successfully tested via a number of previous experimental studies . Nevertheless, the main drawback of the DC technique concerns the requirement for a charged/grounded counter electrode. , Thus, AC spinning, which does not require a counter electrode, appears more suitable for the fabrication of composite yarns.…”