One-Dimensional Dynamics of Jet Flows of Elastic Fluids

Entov, V. M.; Kestenboim, Kh. S.; Pokrovsky, S. V.; Shugay, G. A.

doi:10.1007/bf03374532

Cited by 13 publications

(3 citation statements)

References 5 publications

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“…Beaded fibers are related to the instability of electrospun polymer solution, as studied by Yarin [8] and Entov and Shmaryan [9]. They built mathematical models for the breakup of jets of polymer liquids, which did not include the effects of electric fields.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on relationship between jet instability and formation of beaded fibers during electrospinning

et al. 2005

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Ultrafine fibers produced by electrospinning often exhibit bead-on-string structures, which have generally been considered to be undesirable "by-products" or defects. Theoretical analysis in the literature predicted three types of instabilities for an electrically driven jet: the axisymmetric Rayleigh instability, the electric field-induced axisymmetric, and whipping instability. The process of bead formation revealed that the formation of a beaded structure resulted from axisymmetric deformation and flow of the jet. Applied voltage, solution surface tension, and conductivity (or jet charge density carried by the moving jet) were theoretically demonstrated to be important for jet axisymmetric instabilities. Experimental results revealed that these parameters influenced the formation of beaded fibers in the same manner as they did for the axisymmetric instabilities. As a result, the axisymmetric instabilities were considered to be the most likely mechanism of beaded fibers formation during electrospinning. POLYM. ENG. SCI., 45:704 -709, 2005.

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Section: Introductionmentioning

confidence: 99%

Experimental study on relationship between jet instability and formation of beaded fibers during electrospinning

et al. 2005

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“…In [34][35][36][37] the effect of the accumulation of reversible strains on the pressure head was analyzed theoretically for elastic and viscoelastic liquid jets issuing from convergent channels. It was shown that, depending on the rheological features of the liquids, the pressure head can both increase and decrease as compared with the pressure determined from the Bernoulli formula ∆p ∼ ρv 2 /2.…”

Section: Dynamics and Disintegration Of Jets Of Polymeric Liquidsmentioning

confidence: 99%

Dynamics and Breakup of Viscoelastic Liquids (A Review)

Рожков¹

2005

Fluid Dyn

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“…In this process, several parameters affect the electropun phenomenon such as polymer concentration, solution viscosity, surface tension, applied voltage and tip-to-collector distance. Entov reported that the bead formation occurred as a result of instability of the polymer solution jet [14]. On the other hand, Reneker indicated that solution viscosity, surface tension and net charge density induced by the electrospinning were the main factors in the formation of beads during the formation of electrospun fibers [12].…”

Section: Introductionmentioning

confidence: 99%

The Effect of CdS Nanorods on the Morphology of Electrospun Poly(Vinyl Pyrrolidone) Products

Wang²,

et al. 2007

SSP

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The CdS/PVP fibers have been successfully prepared by electrospinning. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and UV-Vis absorption spectra were used to characterize the structure. Results showed that the concentration of polymer solutions and the CdS amount in the solvent influenced the morphology and the diameter of the electrospun fibers. The electrospinning from CdS/PVP in ethanol produced a structure having a combination of fibers, ribbons, beads and an unexpected half hollow sphere (HHS) structure. When the weight ratio of CdS:PVP was kept at 1:1000, the morphologies of electrospun products changed from HHS, to beaded fibers and ribbons, to beaded fibers, and to bead-free fibers with the increasing of the PVP concentration.

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One-Dimensional Dynamics of Jet Flows of Elastic Fluids

Cited by 13 publications

References 5 publications

Experimental study on relationship between jet instability and formation of beaded fibers during electrospinning

Experimental study on relationship between jet instability and formation of beaded fibers during electrospinning

Dynamics and Breakup of Viscoelastic Liquids (A Review)

The Effect of CdS Nanorods on the Morphology of Electrospun Poly(Vinyl Pyrrolidone) Products

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