Toothed wheel needleless electrospinning: a versatile way to fabricate uniform and finer nanomembrane

Ahmad, Adnan; Ali, Usman; Nazir, Ahsan; Shahzad, Amir; Khaliq, Zubair; Qadir, Muhammad Bilal; Khan, Muhammad Amir; Ali, Sadiq; Hassan, Mohammad A; Tahir, Rizwan; Mushtaq, Bushra

doi:10.1007/s10853-019-03875-0

Cited by 26 publications

(15 citation statements)

References 40 publications

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“…Generally, simulations of the electric field in needleless electrospinning have revealed strong differences of the electric field near the connection line between both electrodes and farther away. Ahmad et al, e.g., showed that for a modified spinning wheel with teeth the highest electric fields were only available in a range of few cm and dropped fast outside this region [42]. Electrical field variations by approx.…”

Section: Resultsmentioning

confidence: 99%

Orientation of Electrospun Magnetic Nanofibers Near Conductive Areas

et al. 2019

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Electrospinning can be used to create nanofibers from diverse polymers in which also other materials can be embedded. Inclusion of magnetic nanoparticles, for example, results in preparation of magnetic nanofibers which are usually isotropically distributed on the substrate. One method to create a preferred direction is using a spinning cylinder as the substrate, which is not always possible, especially in commercial electrospinning machines. Here, another simple technique to partly align magnetic nanofibers is investigated. Since electrospinning works in a strong electric field and the fibers thus carry charges when landing on the substrate, using partly conductive substrates leads to a current flow through the conductive parts of the substrate which, according to Ampère’s right-hand grip rule, creates a magnetic field around it. We observed that this magnetic field, on the other hand, can partly align magnetic nanofibers perpendicular to the borders of the current flow conductor. We report on the first observations of electrospinning magnetic nanofibers on partly conductive substrates with some of the conductive areas additionally being grounded, resulting in partly oriented magnetic nanofibers.

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Section: Resultsmentioning

confidence: 99%

Orientation of Electrospun Magnetic Nanofibers Near Conductive Areas

et al. 2019

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“…PVP solution concentration was varied at 2, 4, 6, 8, and 10 wt%. The applied voltage was altered at 15,20,25,30,35, and 40 kV. The PVP solution was run at flow rates of 5, 10, 15, 20, and 25 ml * h −1 .…”

Section: Synthesis Of Fibersmentioning

confidence: 99%

“…The graph shows that the higher the applied voltage, the greater the number of jets. The number of jets yielded by the wire as the applied voltage was varied by 15,20,25,30,35, and 40 kV were (0.89±0.35), (4.55±0.55), (7.72±0.86), (10.95±0.43), (11.46±0.51), and (12.06±0.48) jet * cm −1 s −1 , respectively. Similar results, which were examined using different needleless electrospinning systems, were also reported on other studies [29,32].…”

Section: Effect Of Process Parametersmentioning

confidence: 99%

“…In addition, as the applied voltage was increased, diameter of the yielded fibers decreased. The average diameter of PVP fibers when the applied voltage was varied by 15,20,25,30,35, and 40 kV were (1.68±0.09), (1.48±0.11), (1.41±0.09), (1.41±0.10), (1.33±0.08), and (1.33±0.06) μm, respectively. In a study examined by Jiang, et al (2014), it was found that a slight decrease in fibers diameter occured due to an increase in applied voltage, resulting an extension of jets, so the fibers formed were thinner [29].…”

Section: Effect Of Process Parametersmentioning

confidence: 99%

“…More recently, Ahmad et al [25] developed a needleless electrospinning system with a thoothed wheel as the spinneret to improve productivity during electrospinning process. Meanwhile, Hassan et al [26] utilized a bulletspinneret to overcome problem caused by low productivity during fibers production and yield nanofibers at low applied voltage.…”

Section: Introductionmentioning

confidence: 99%

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Needleless electrospinning system with wire spinneret: an alternative way to control morphology, size, and productivity of nanofibers

2020

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Electrospinning is a versatile method to produce nanofibers. Electrospun nanofibers have been extensively used in many industrial applications such as wound dressing, sensor, protective clothing, and filters. However, producing nanofibers efficiently through a single-needle electrospinning technique is still challenging. In this study, a system of needleless electrospinning with a wire spinneret was utilized to produce Polyvinylpyrrolidone (PVP) nanofibers. Process parameters comprised concentration of solution, applied voltage, flow rate of solution, collection distance, and diameter of the wire spinneret were altered to examine morphology, diameter, and productivity of the produced fibers. SEM images showed that morphology of the produced fibers was affected by concentration of PVP solution. Moreover, diameter of the produced fibers could be varied by controlling the process parameters. Our needleless electrospinning system has proved to be more productive in producing fibers than the single-needle electrospinning system.

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State‐of‐the‐Art and Future Electrospun Technology

Rastogi

Kandasubramanian

2020

Electrospun Materials and Their Allied Applications

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Toothed wheel needleless electrospinning: a versatile way to fabricate uniform and finer nanomembrane

Cited by 26 publications

References 40 publications

Orientation of Electrospun Magnetic Nanofibers Near Conductive Areas

Orientation of Electrospun Magnetic Nanofibers Near Conductive Areas

Needleless electrospinning system with wire spinneret: an alternative way to control morphology, size, and productivity of nanofibers

State‐of‐the‐Art and Future Electrospun Technology

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