1. Fyzikální principy tvorby nanovláken 11. Kapalinová tryska
D.Lukáš
2010

2. Donghua University, Shanghai, China
Reference:
Xiao-Hong Quin & col
Donghua University, Shanghai, China
Effect of LiCl on electrospinning of PAN polymer solution: theoretical analysis and experimental verification
Polymer,

3. z
Liquid density
Volume flow rate
Rovnice kontinuity, zákon zachování hmoty
Applied electric field
Surface
Bulk + + +
Rovnice kontinuity pro náboj
El. current r u
Surface density of the charge + + +
Dimensionless conductivity + +

4. Bernoulli equation
Zákon zachování energie
Electrostatic surface force
Viscous force

5. Scaling and dimensionless analysis
mass
current
Allometric relation
energy

6. m=?
Nonlinear differential equation

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

12. Whipping part of the jet

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

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

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