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Physical principles of nanofiber production 11. liquid jet. D.Lukáš 2010. Reference:. Xiao - Hong Quin & col Donghua University, Shanghai, China Effect of LiCl on electrospinning of PAN polymer solution: theoretical analysis and experimental verification.

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slide2

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

slide3

z

Liquid density

Volume flow rate

Applied electric field

Surface

Bulk

+

+

+

El. current

r

u

Surface density of the charge

+

+

+

Dimensionless conductivity

+

+

slide4

Bernoulli equation

Electrostatic surface force

Viscous force

slide5

Scaling and dimensionless analysis

mass

current

Allometric relation

energy

slide6

m=?

Nonlinear differential equation

slide7

z

+

+

+

r

u

+

+

+

+

+

slide13

b

a

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

slide14

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

slide15

a b

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