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Discretized modeling of electrically driven viscoelastic jets in the initial stage of electrospinning
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10.1063/1.3582119
/content/aip/journal/jap/109/9/10.1063/1.3582119
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/9/10.1063/1.3582119

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Sketch of the electrospinning setup.

Image of FIG. 2.
FIG. 2.

Sketch of the modeling approach. The charged beads emerge from the spinneret and are accelerated downwards by the electric field. The connector elements consist of a viscoelastic Maxwell element in parallel with a Newtonian viscous dumbbell element, representing the Newtonian solvent in which the polymer chains are embedded.

Image of FIG. 3.
FIG. 3.

Simulation results for 4000 ppm PIB Boger fluid.

Image of FIG. 4.
FIG. 4.

Influence of solvent viscosity on jet radius profile.

Image of FIG. 5.
FIG. 5.

Radius profiles obtained from bead-spring simulations, continuum simulations and experiment. (a) 4000 ppm PIB Boger fluid, and (b) 8000 ppm.

Image of FIG. 6.
FIG. 6.

Stress profile along the jet during electrospinning for 4000 ppm PIB Boger fluid, ΔV = 12 kV.

Image of FIG. 7.
FIG. 7.

Fraction of the jet current carried by convection, eeff/eo for electrospinning of 4000 ppm PIB Boger fluid, under the spinning conditions in Sec. III C.

Image of FIG. 8.
FIG. 8.

Influence of surface tension on the initial jet profile.

Image of FIG. 9.
FIG. 9.

Influence of the applied potential difference on stable jet profiles for 8000 ppm PIB Boger fluid.

Image of FIG. 10.
FIG. 10.

Experimental image of stable jet observed during electrospinning of PEO-2M using ΔV = 10 kV, d = 25 cm, Q = 0.1 mL/min.

Image of FIG. 11.
FIG. 11.

Bead-spring model simulation prediction for stable jet radius development for electrospinning of PEO-2M, and comparison with experimental data.

Tables

Generic image for table
Table I.

Property values for various PIB Boger fluids, and for 2.5 wt% PEO/water solution.a

Generic image for table
Table II.

Characteristic scales and dimensionless groups.

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/content/aip/journal/jap/109/9/10.1063/1.3582119
2011-05-12
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Discretized modeling of electrically driven viscoelastic jets in the initial stage of electrospinning
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/9/10.1063/1.3582119
10.1063/1.3582119
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