Our process of electrospinning has repeatedly experiencing breaking of taylor cone from the tip of the niddle. Can any one explain reason for this? Process: applied Volt: 20KV, 5mL syringe, PVA solution. flow rate 1 mL/hr .
Hi Dhruba Jyoti Sarkar,
Electrospinning is a complex system. There may be many reasons for your problem. However, according to my experience, low solution concentration and high feed rate may be a cause. Your feed rate seems to be high. May be the cause, but I'm not sure. I tried the study parameters following. The molecular weight of the polymer I worked was between 80,000-100,000. I hope it helps.
Dear Dhruba Jyoti Sarkar . If your solution has enough entanglement, flow rate and kV should be in balance to avoid breaking of the Jet. So a lower kV or higher flow rate might fix your challenge.
Dear Dhruba,
I think that your feedrate is not the correct. Taylor's cone appears when the voltage and feedrate of the polymer outlet are balanced. That is, if the polymer disappears inside the tip it means that the voltage is too high. whereas if a drop is formed at the tip it means that the voltage is too low. We should know what type of break is ... The degree of PVA hydrolysis, its concentration and molecular weight should also be taken into account.
The conductivity can be increased with NaCl, if you have a low conductivity. There could also be other factors...
I hope I've helped. Good luck
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