The Spinning State and Nanofiber Orientation of the Yarn Produced by a Novel Multi-Needles Electrospinning

Abstract

Electrospinning is one of the few simple and effective ways to produce nanofibers, which can be used in various fields. However, the common assembled nanofiber mats are limited in some areas, so static bath was used as the negative collector to produce nanofiber yarns. In order to improve the yields, a novel multi-needle electrospinning using static bath collector was employed, the spinning state and the nanofiber orientation of the as-spun yarns in different numbers of spinning needles are described in details. The results showed that the critical voltages, keeping the electrospinning process stable, increased from 21KV to 28KV with the number of spinning needles increasing from 1-5. Nevertheless, the orientation degrees of the nanofibers in the yarn decreased from 94.40% to 81.29%. Based on the SEM images and orientation degrees of the yarns, the alignment of the nanofibers along the axis of the yarn was seemed still pretty well when the 1-4 needles used. But it was seemed a little disordered when the number of needles reached 5, which was not so well for applications.

Morphological and mechanical properties of drawn poly(l‐lactide) electrospun twisted yarns

“…In recent years, various methods have been developed to prepare nanofiber yarns using different mechanical collection devices and the manipulation of the electric field [4,5,15,[20][21][22][23]. In this work, to produce continuous twisted yarns, an electrospinning setup consisting of two oppositely charged nozzles was used.…”

“…Comparing to the non‐woven mats, the yarns hold more lateral interaction and friction between nanofibers which assists in improving mechanical properties. It can be expected that nanofiber yarns will find more applications not only in traditional textile, where conventional yarns are being used, but also in new fields such as reinforcement materials and medical textiles, for example, tissue scaffolds, surgery suture, and woven wound dressing .…”

Influence and evaluation of array-nozzle geometry on near- field electrospinning direct writing

“…However, the uniformity of collecting location in the triangular alignment system was better. Tian et al 4 quantitatively evaluated the strength of EFIF by proposing the effects of different nozzles number and arrangement on the structure and properties of nanofibers in water bath electrospinning. Liu and Guo 15 considered the EFIF intensity of different nozzle spacing, nozzle lengths and voltages by electric field simulation, and used the plastic sleeve to effectively reduce the EFIF, and obtained the optimal nozzle arrangement.…”

“…3 In recent years, the prepared fiber films or the uniformity of the jets has been used to evaluate the rationality of the nozzle design. Although there is a quantitative analysis of the relationship between EFIF and the prepared fiber structure, 4 this is not suitable for the conditions in near-field electrospinning (NFES). Therefore, how to suppress the NFES of multi-nozzle has become an issue that researchers have intensively studied.…”

Electrospinning of continuous poly (L-lactide) yarns: Effect of twist on the morphology, thermal properties and mechanical behavior

“…It can be expected that yarns composed of assembled nanofibers will find wider applications, not only in traditional textiles but also in reinforced materials and medical textiles (Abbasipour and Khajavi, 2013;Ali et al, 2011b;J.-X. He et al, 2013;Maleki et al, 2016Maleki et al, , 2015Maleki et al, , 2013Semnani Rahbar et al, 2016;Shuakat and Lin, 2014;Smit et al, 2005;Su et al, 2013;Tian et al, 2013;Zhou et al, 2012).…”