Effect of different emitter types on the production of nanofibrous tubular structures: Thickness uniformity and productivity

Kotzianová, Adéla; Klemeš, Jan; Židek, Ondřej; Mlynar, Zdenek; Pokorný, Marek; Velebný, Vladimı́r

doi:10.1063/1.5088078

Cited by 3 publications

(3 citation statements)

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“…These initial experiments were evaluated visually and using image analysis tools. The image analysis was based on the fact that the pixel intensity of an image of a deposited layer photographed against light corresponds with the thickness of the layer [14,15]. Figure 4 shows images of layers deposited at different movement speeds of the moving body above the spinning electrode and of the belt.…”

Section: Resultsmentioning

confidence: 99%

The Effects of Electric Field Dynamics on the Quality of Large-Area Nanofibrous Layers

et al. 2021

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This paper presents technological modifications of an electrostatic spinning device, which significantly increase the thickness homogeneity (i.e., quality) of produced layers by creating auxiliary dynamic electric fields in the vicinity of the spinning and collector electrodes. A moving body was installed above the needleless spinning electrode, which destabilized the standing wave occurring on the free surface of the spinning solution. Furthermore, an endless belt design was used for the collector electrode instead of a roll-to-roll design, which made it possible to substantially increase the surface speed of the substrate and, therefore, the dynamics of the electric field at the place of collection of the fibers being spun. As a result, the coefficient of variation of the area weight of 912 samples cut out from the deposited nanofibrous layer, which was (1000 × 500) mm2 in size and had an average area weight of (17.2 ± 0.8) g/m2, was less than 4.5%. These results were obtained only when the dynamics of both the spinning and collector electrodes were increased at the same time. These modifications resulted in a significant increase in the quality of deposited nanofibrous layers up to the standard required for their use in pharmaceutical applications.

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Section: Resultsmentioning

confidence: 99%

The Effects of Electric Field Dynamics on the Quality of Large-Area Nanofibrous Layers

et al. 2021

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“…Various characteristics, such as the material type, diameter and density of nanofiber and the thickness of nanofiber membrane, will affect the performance of electrospun nanofibres membrane, while the diameter distribution of nanofiber and the uniformity of fibre deposition are key factors affecting the overall performance of electrospun nanofibres membrane [11,30,31]. For instance, the number of spinning needles affects the uniformity of the thickness of the spinning zone and its application in small-vessel replacement [32]. However, it is difficult to achieve uniform control of nanofiber deposition solely by increasing the number of needles.…”

Section: Introductionmentioning

confidence: 99%

Study on uniformity of multi‐needle electrostatic spinning by auxiliary flow field

Zhang,

Chen,

Wang

et al. 2024

Micro & Nano Letters

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Multi‐needle electrospinning is a simple and general method for mass preparation of nanofiber membrane, which has great industrial potential. However, the bending instability produced in the electrospinning process makes that the deposition uniformity of the nanofiber is still a big concern, resulting in non‐uniform nanofiber membrane, which seriously affects the application of electrospun membrane in environmental filtration, new energy and medical fields. In order to improve the uniformity of nanofiber deposition in multi‐needle electrospinning, an auxiliary flow field system (AFF) is proposed, which can effectively improve the uniformity of nanofiber deposition. After image processing, the uniformity of nanofiber deposition is quantified with the index of grey distribution, and the effectiveness of this method is verified. Combined with the multi‐physical field analysis, the influence mechanism of cross‐wind field on the uniformity of fibre deposition was revealed. By optimizing the experimental parameters, the non‐uniformity of nanofiber deposition was reduced by 49.19%. Based on multi‐needle electrospinning technology, a reliable idea (AFF) and experimental basis are provided for the uniform preparation of nanofiber membrane.

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“…In order to prepare larger-area structures with a homogeneous distribution of nanofibers, the electrodes must be moving. At present, this requirement is fulfilled by moving the spinning jet along a line and by rotating the collector [11]. Nevertheless, achieving thickness homogeneity on practically applicable 2D surfaces remains problematic [12].…”

Section: Introductionmentioning

confidence: 99%

Surface Treatment of Acetabular Cups with a Direct Deposition of a Composite Nanostructured Layer Using a High Electrostatic Field

et al. 2020

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A composite nanofibrous layer containing collagen and hydroxyapatite was deposited on selected surface areas of titanium acetabular cups. The layer was deposited on the irregular surface of these 3D objects using a specially developed electrospinning system designed to ensure the stability of the spinning process and to produce a layer approximately 100 micrometers thick with an adequate thickness uniformity. It was verified that the layer had the intended nanostructured morphology throughout its entire thickness and that the prepared layer sufficiently adhered to the smooth surface of the model titanium implants even after all the post-deposition sterilization and stabilization treatments were performed. The resulting layers had an average thickness of (110 ± 30) micrometers and an average fiber diameter of (170 ± 49) nanometers. They were produced using a relatively simple and cost-effective technology and yet they were verifiably biocompatible and structurally stable. Collagen- and hydroxyapatite-based composite nanostructured surface modifications represent promising surface treatment options for metal implants.

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Effect of different emitter types on the production of nanofibrous tubular structures: Thickness uniformity and productivity

Abstract: High-performance field emission device utilizing vertically aligned carbon nanotubesbased pillar architectures AIP Advances 8, 015117 (2018);

Cited by 3 publications

References 20 publications

The Effects of Electric Field Dynamics on the Quality of Large-Area Nanofibrous Layers

The Effects of Electric Field Dynamics on the Quality of Large-Area Nanofibrous Layers

Study on uniformity of multi‐needle electrostatic spinning by auxiliary flow field

Surface Treatment of Acetabular Cups with a Direct Deposition of a Composite Nanostructured Layer Using a High Electrostatic Field

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