Modelling of electrospinning process at various electric fields

Karatay, Okan; Doğan, Mustafa

doi:10.1049/mnl.2011.0440

Cited by 20 publications

(17 citation statements)

References 14 publications

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“…In this section, theoretical model of the manipulated jet path is constructed by integrating the electrostatic field equations of the parallel conducting plates to the previously evaluated system equations of the hollow cylinder [15]. Throughout the calculations, electrospinning jet path is approximated by a model that closely follows Reneker et.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Every bead is assumed to possess the same amount of charge and a mass symbolized with e and m, respectively. Besides, electric field caused due to the potential difference is axial and uniform whereas the air drag and gravity forces are negligibly small [7], [15].…”

Section: A Discrete Bead Model Of the Charged Polymer Jet Pathmentioning

confidence: 99%

“…The constants for the hollow cylinder with 5 cm of radius and 1 cm of height can be approximated as c 0 → 0, c 1 → 2, 28 [15]. Furthermore, the evaluated constant values are integrated to the Green's function and using the superposition principle, potential change through the jet trajectory is calculated [15]:…”

Section: B Electric Field Generated By the Hollow Cylindrical Electrodementioning

confidence: 99%

“…The high voltage applied to the syringe needle is provided by a high-power voltage generator which can supply voltages up to 30 kV [15], [21]. The distance from the tip to the collector, h, was around 0.1 m. The finite-length hollow cylindrical electrode (5 cm of radius and 1 cm of thickness) is placed at a distance of 3.5 cm below the needle.…”

Section: Experimental Observationsmentioning

confidence: 99%

“…All electrospinning experiments are performed in a closed pot in order to prevent possible negative effects of airstreams on the observations. Furthermore, the electronics used to drive the syringe tip, focusing and steering electrodes were custom designed [15], [21], [22].…”

Section: Experimental Observationsmentioning

confidence: 99%

See 4 more Smart Citations

An Alternative Electrospinning Approach With Varying Electric Field for 2-D-Aligned Nanofibers

Karatay

Doğan

Uyar

et al. 2014

IEEE Trans. Nanotechnology

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In the electrospinning process, unstructured nanofiber mats are produced by oriented fluid jets with an external electrostatic field. Electrospun fibers have wide applications for the fabrication of composite materials, tissue scaffold, and membranes. However, electrospun fiber production systems have many problems, e.g., the bending instability due to the complicated oscillations of polymer jet. In this research, parallel plate and hollow cylindrical conducting electrodes are implemented through the jet trajectory in order to investigate the possibility of controlled deposition of polymer fibers. Parallel electrodes with proper driving sources can generate the steering field for the nanofiber formation at the collector plate based on analog addressing electronics. It was shown that the modulated electric field applied through the parallel plate electrodes notably increased the deposition of the electrospun polymer fibers in a controlled fashion at the collector, which is coherent to the computer simulations. Furthermore, the finite-length hollow cylinder dampened the bending instabilities of the polymer jet which decreases the characteristic spot size of the deposited electrospun fiber to a smaller diameter.

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Section: Mathematical Modelmentioning

confidence: 99%

Section: A Discrete Bead Model Of the Charged Polymer Jet Pathmentioning

confidence: 99%

Section: B Electric Field Generated By the Hollow Cylindrical Electrodementioning

confidence: 99%

Section: Experimental Observationsmentioning

confidence: 99%

Section: Experimental Observationsmentioning

confidence: 99%

See 3 more Smart Citations

An Alternative Electrospinning Approach With Varying Electric Field for 2-D-Aligned Nanofibers

Karatay

Doğan

Uyar

et al. 2014

IEEE Trans. Nanotechnology

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A Novel Theoretical Model Development and Simulation of Melt‐Electrospinning Using Kane's and Udwadia–Kalaba Methods

Wubneh

Ayranci

Kim

2022

Advcd Theory and Sims

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A novel analytical model development and simulation of melt-electrospinning process is presented. Unconstrained equations of motion for the description of a discretized melt-electrospun fiber are formulated using Kane's method. The motions of the spinneret and the collector plate are also incorporated into the kinematics formulation to simulate direct writing and three-dimensional printing scenarios. Constraints describing viscoelastic joints in the system and the phenomenon of the melt-electrospun fiber adhering to the collector plate are implemented using the Udwadia Kalaba method. Rotational viscoelastic elements are introduced to mimic the dampening of the whipping motion observed in the unstable region. A novel algorithm is devised to continuously run the simulation with no limit on the total duration and phase transitions. System responses such as fiber diameter, collection size, fiber elongations, and jet speeds are monitored for changes in control parameters including applied voltage, collector distance, and flowrate. The results demonstrate close agreement with experimental observations in the literature. The jet starts relatively straight on the onset of its trajectory and develops subtle whipping motion as it advances toward the collector plate. Reduction in the amplitude of the whipping motion is observed once the free end of the fiber adhered to the collector plate.

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Modeling and optimization of electrospinning of polyvinyl alcohol (PVA)

Elkasaby¹,

Hegab²,

Mohany³

et al. 2017

Adv Polym Technol

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The electrospun fibers can have applications in diverse fields, such as tissue scaffolds, optical electronics, nanocatalysis, and sound absorption. Nanoscale fibers with a higher surface area can provide superior mechanical, physical, and thermal properties. Therefore, investigation of the factors affecting the electrospinning process, for various materials, is required. In this study, the design of experiments issued for optimization of electrospinning of polyvinyl alcohol (PVA). Analysis of variance (ANOVA) and the Taguchi orthogonal array L27OA are employed to analyze the influence of process control parameters. The variables studied are the applied voltages, solution concentrations, rotational speeds, collecting distances, and flow rates.A mathematical model of the polymer fiber diameter as a function of significant process parameters has been built using response surface methodology (RSM). The concentration percentage and the flow rate were determined to be the most significant process variables at 99% and 90% confidence levels, respectively. The predictive model provides 84.34% average model accuracy, which is considered acceptable as this study deals only with 27 of 243 trials needed for a full study based on principles of design of experiments. An additional ANOVA test and corresponding mathematical model have been developed to obtain the interaction effects for processing parameters. K E Y W O R D Sdesign of experiments, electrospinning, polyvinyl alcohol nanofibers, response surface methodology

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Modelling of electrospinning process at various electric fields

Cited by 20 publications

References 14 publications

An Alternative Electrospinning Approach With Varying Electric Field for 2-D-Aligned Nanofibers

An Alternative Electrospinning Approach With Varying Electric Field for 2-D-Aligned Nanofibers

A Novel Theoretical Model Development and Simulation of Melt‐Electrospinning Using Kane's and Udwadia–Kalaba Methods

Modeling and optimization of electrospinning of polyvinyl alcohol (PVA)

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