Design of Coaxial Needleless Electrospinning Electrode with Respect to the Distribution of Electric Field

The paper is focused on the design of the electrode for needleless coaxial electrospinning. This method allows to produce core/shell nanofibers from the free surface of a polymeric two-layer. The geometry of the designed model of electrode was analyzed using the software Autodesk Simulation Multiphysics. The results of electrostatic field simulation indicate the sharp edges of the electrode as the source of high electric intensity. These sharp edges lead to the loss of the electric energy during the electrospinning process. Based on that, the new cylindrical geometry of the electrode was developed. The results of carried out experiments clearly demonstrate the enhancement of the electrospinning process stability.

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Improving electrospinning process by numerical analysis of 3-D computer models

COMPEL The International Journal for Computation and Mathematics in Electrical and Electronic Engineering ◽

10.1108/compel-11-2018-0450 ◽

2019 ◽

Vol 38 (4) ◽

pp. 1098-1110

Author(s):

Anna Firych-Nowacka ◽

Krzysztof Smolka ◽

Sławomir Wiak

Keyword(s):

Field Strength ◽

Electric Field ◽

Field Intensity ◽

Electrostatic Field ◽

Electric Field Intensity ◽

Computer Models ◽

Electrospinning Process ◽

Strength Analysis ◽

Original Solution ◽

Content Type

Purpose Electrospinning is a method of the polymer super thin fibres formation by the electrostatic field. The distribution of electrostatic field affects the effectiveness of the electrospinning. Design/methodology/approach This paper presents various computer models that can improve the electrospinning process. The possibilities of modelling the electrostatic field in the design of electrospinning equipment are presented. Findings In the research part, the one focussed on finding a cylinder-shaped collector structure to limit the adverse effect of an uneven distribution of the electric field intensity on the collector. Originality/value The paper concerns the improvement of the electrospinning process with the use of electrostatic field modelling. In the first part, several possible applications of electrostatic models have been indicated, thanks to which the efficiency of the process has been improved. The original solution of the collector geometry was presented, which according to the authors, in comparison with previous models, gives the most promising results. In this solution, it was possible to obtain an even distribution of the electric field intensity while removing the unfavourable effect of the field strength increase on the outer edges of the collector. The most important aspect in this paper is electric field strength analysis.

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Fabrication and characterization of continuous silver nanofiber/polyvinylpyrrolidone (AgNF/PVP) core–shell nanofibers using the coaxial electrospinning process

RSC Advances ◽

10.1039/c6ra05869h ◽

2016 ◽

Vol 6 (59) ◽

pp. 54162-54168 ◽

Cited By ~ 15

Author(s):

Molla Bahiru Gebeyehu ◽

Yu-Hao Chang ◽

Angaw Kelemework Abay ◽

Shao-Yen Chang ◽

Jiunn-Yih Lee ◽

...

Keyword(s):

Electrospinning Process ◽

Coaxial Electrospinning ◽

Core Shell ◽

Electrospinning Method ◽

Fabrication And Characterization

Core–shell silver nanofiber/polyvinylpyrrolidone (AgNF/PVP) nanofibers have been successfully fabricated via an efficient coaxial-spinneret electrospinning method with a vertical configuration using PVP and AgNO3 as precursor solutions.

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On a Numerical Model for Free Surface Flows of a Conductive Liquid Under an Electrostatic Field

Journal of Fluids Engineering ◽

10.1115/1.4007158 ◽

2012 ◽

Vol 134 (9) ◽

Cited By ~ 4

Author(s):

Sajad Pooyan ◽

Mohammad Passandideh-Fard

Keyword(s):

Free Surface ◽

Numerical Model ◽

Electric Field ◽

Electrostatic Field ◽

Stokes Equations ◽

Free Surface Flows ◽

Computational Method ◽

Perfect Conductor ◽

Computational Domain ◽

Conductive Liquid

In this paper, a numerical model is developed that can simulate the unsteady axisymmetric free-surface flow of a perfectly conductive liquid under an electrostatic field. The effect of the electrostatic field is modeled by a force distributed on the liquid free surface. Assuming the liquid as a perfect conductor makes it possible to reduce the general electromagnetic equations to electrostatic equations. The Navier–Stokes equations are solved to find the velocity and pressure fields. The free surface advection and reconstruction are performed based on the volume-of-fluid method using Youngs’ algorithm. To evaluate the effect of the electric field on the free surface, the electrostatic potential is first solved for the entire computational domain. Next, the electric field intensity and the surface density of the electric charge are calculated on the free surface after which the electric force can be determined. The computational method for treating this force is similar to that of the surface tension using the continuum surface force method. The developed model is validated by a comparison between the calculated results with those of the analytics as well as experiments for an electrowetting scenario.

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A novel bifunctional thermo-sensitive poly(lactic acid)@poly(butylene succinate) core–shell fibrous separator prepared by a coaxial electrospinning route for safe lithium-ion batteries

Journal of Materials Chemistry A ◽

10.1039/c7ta08063h ◽

2017 ◽

Vol 5 (44) ◽

pp. 23238-23242 ◽

Cited By ~ 26

Author(s):

Xiaoyu Jiang ◽

Lifen Xiao ◽

Xinping Ai ◽

Hanxi Yang ◽

Yuliang Cao

Keyword(s):

Lactic Acid ◽

Lithium Ion Batteries ◽

Lithium Ion ◽

Electrospinning Process ◽

Poly Lactic Acid ◽

Coaxial Electrospinning ◽

Core Shell ◽

Butylene Succinate ◽

Thermally Induced

A thermally induced shutdown separator of PLA@PBS is successfully fabricated by a facile coaxial electrospinning process for safe lithium ion batteries.

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Fabrication of Thermal Intelligent Core/Shell Nanofibers by the Solution Coaxial Electrospinning Process

Advances in Polymer Technology ◽

10.1002/adv.21534 ◽

2015 ◽

Vol 35 (1) ◽

Cited By ~ 19

Author(s):

Babak Rezaei ◽

Mozhdeh Ghani ◽

Mohsen Askari ◽

Ahmad Mousavi Shoushtari ◽

Reza Mohammad Ali Malek

Keyword(s):

Electrospinning Process ◽

Coaxial Electrospinning ◽

Core Shell

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Preparation and characterization of coaxial electrospun polysulfone amide/polyurethane

Journal of Industrial Textiles ◽

10.1177/1528083715627165 ◽

2016 ◽

Vol 46 (8) ◽

pp. 1581-1597 ◽

Cited By ~ 4

Author(s):

Xi Tong ◽

Xin Bin-Jie

Keyword(s):

Thermal Properties ◽

Electron Microscope ◽

Electric Field ◽

High Speed ◽

Coaxial Electrospinning ◽

Core Shell ◽

High Speed Photography ◽

Mechanical And Thermal Properties ◽

The Core ◽

Coaxial Fibers

In this study, a novel approach and the related equipment of coaxial electrospinning have been developed to fabricate a new ultrafine polysulfone amide/polyurethane coaxial fibers at nanoscale, with the polysulfone amide as the core and the polyurethane as the shell of the blended fibers. As the co-spinneret has effects on the structure and properties of the spun fiber, three types of co-spinnerets with different diameters were designed to investigate its effects on the fabricated fibers in this research. Three series of polysulfone amide/polyurethane coaxial fibers were spun using the self-developed coaxial electrospinning equipment, and these fibers were characterized systematically using scanning electron microscope, transmission electron microscope, X-ray diffraction, differential scanning calorimeter and thermogravimetric. High-speed photography was used to digitalize the image of the tailor cone and jet motion of polymer fluid during the spinning process, which provides a detailed description of the electrospinning for the further theoretical analysis. The three-dimensional electric field simulation was also carried out to model the differences of electric field. Our experimental results show that the mechanical and thermal properties of the core–shell fibers fabricated in this research have been improved in the comparison with the fibers spun using the conventional single-needle electrospinning method. The composite fibers have the core–shell structure, so that it can combine the excellent thermal properties of the polysulfone amide and the excellent mechanical properties of the polyurethane. The newly developed polysulfone amide/polyurethane fiber could be used in the field of industrial textiles; it has the potential applications for the development of high-performance apparels in the future.

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