physical principles of nanofiber production 11 liquid jet n.
Skip this Video
Loading SlideShow in 5 Seconds..
Physical principles of nanofiber production 11. liquid jet PowerPoint Presentation
Download Presentation
Physical principles of nanofiber production 11. liquid jet

play fullscreen
1 / 15
Download Presentation

Physical principles of nanofiber production 11. liquid jet - PowerPoint PPT Presentation

ksena
117 Views
Download Presentation

Physical principles of nanofiber production 11. liquid jet

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Physical principles of nanofiber production11. liquid jet D.Lukáš 2010

  2. Reference: Xiao-HongQuin& col Donghua University, Shanghai, China Effect of LiCl on electrospinning of PAN polymer solution: theoretical analysis and experimental verification Polymer, www.elsevier.com/locate/polymer

  3. z Liquid density Volume flow rate Applied electric field Surface Bulk + + + El. current r u Surface density of the charge + + + Dimensionless conductivity + +

  4. Bernoulli equation Electrostatic surface force Viscous force

  5. Scaling and dimensionless analysis mass current Allometric relation energy

  6. m=? Nonlinear differential equation

  7. z + + + r u + + + + +

  8. Whipping part of the jet

  9. b a Figure 4.4. Loops in unstable region of jet, caught on a slide glass -(a) PVA jet, (b) PEO jet.

  10. Figure 4.6. Schematic diagram showing the Pendulum mechanism: (1) ground collector, (2) pendulum and (3) spinning electrode with a polymer.

  11. a b Figure 4.5. Instability of Polyethylene-oxide jet - Exposed with two various exposure times of 1 ms and 18 ns.