Simulation of the electrospinning process

• Autorzy: Karra S. , Srinivasa A. R.
• Języki publikacji: EN

Abstrakty

EN

The electrospinning process is modeled and the bending instability of a slender viscoelastic jet is simulated. This is accomplished by modifying the discrete bead model by Reneker et al. (2000). Specifically, the force due to surface tension is incorporated using the expression suggested by Kowalewski et al. (2005) (see Eq.(7)). The results obtained by the use of this modification seem to be in accord with the experimental observations reported in Reneker et al. (2000) (Fig.2). An attempt is also made to simulate the effect of a secondary electric field which could be used to control the electrospinning process and whipping instability. It is observed that the external secondary field considered here, unwinds the jet spirals, reduces the whipping instability and increases the tension in the fiber.

Słowa kluczowe

EN

electrospinning; nanofiber; viscoelastic fluid; simulation; discrete bead; polymer

PL

elektrospining; nanowłókno; ciecz lepkosprężysta; polimery

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2009
• Tom: Vol. 14, no 1
• Strony: 175--188
• Opis fizyczny: Bibliogr. 10 poz., rys., wykr.

Twórcy

autor

Karra S.

autor

Srinivasa A. R.

• Department of Mechanical Engineering Texas A&M University, College Station TX 77843 3123, USA,

Bibliografia

• Feng J.J (2002): The stretching of an electrified non-Newtonian jet: A model for electrospinning. - Phys. Fluids, vol.14, pp.3912-3926.
• Feng J.J (2003): Stretching of a straight electrically charged viscoelastic jet. - J. Non-Newtonian Fluid Mech., vol.116, pp.55-70.
• Hohman M.M., Shin M., Rutledge G. and Brenner M.P. (2001): Electrospinning and electrically forced jets. instability theory. - Phys. Fluids, vol.13, pp.2201-2220.
• Jaworek A. and Krupa A. (1999): Classification of the modes of EHD spraying. - J. Aerosol Sci, vol.30, pp.873-893.
• Kowalewski T.A., Blonski S. and Barral S. (2005): Experiments and modeling of electrospinning process. - Bull. Pol. Acad. Sci., vol.53, pp.385-394.
• Reneker D.H., Yarin A.L., Fong H. and Koombhongse S. (2000): Bending instability of electrically charged liquid jets of polymer solutions in electrospinning. - J. Appl. Phys., vol.87, pp.4531-4547.
• Taylor G. (1964): Disintegration of water drops in electric field. - Proc. Roy. Soc. Lond. A, vol.280, pp.383-397.
• Teo W.E. and Ramakrishna S. (2006): A review on electrospinning design and nanofibre assemblies. - Nanotechnology, vol.17, pp.R89-R106.
• Theron S.A., Yarin A.L., Zussman E. and Kroll E. (2005): Multiple jets in electrospinning: experiment and modeling. - Polymer, vol.46, pp.2889-2899.
• Yarin A.L., Koombhongse S. and Reneker D.H. (2001): Bending instability in electrospinning of nanofibers. - J. Appl. Phys., vol.89, pp.3018-3026.