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
z Liquid density Volume flow rate Applied electric field Surface Bulk + + + El. current r u Surface density of the charge + + + Dimensionless conductivity + +
Bernoulli equation Electrostatic surface force Viscous force
Scaling and dimensionless analysis mass current Allometric relation energy
m=? Nonlinear differential equation
z + + + r u + + + + +
b a Figure 4.4. Loops in unstable region of jet, caught on a slide glass -(a) PVA jet, (b) PEO jet.
Figure 4.6. Schematic diagram showing the Pendulum mechanism: (1) ground collector, (2) pendulum and (3) spinning electrode with a polymer.
a b Figure 4.5. Instability of Polyethylene-oxide jet - Exposed with two various exposure times of 1 ms and 18 ns.