Hi everyone,
We make nanofiber with electrospinning using 15% PVA aqueous solution (MW 30-70 kDa), but we met various problems, such as dropping, low flow rate, long process time.
When literatures were reviewed flow rate ranged between 0,5-1 ml/h, but we could not use flow rate with above 0,5 ml/h, because of dropping.
What can you recommend to speed up and improve the process?
hi Ozlem Coban,
you can use high flowrate above 0.5 ml/h but for that you need to increase the applied voltage and increase the distance between drum collector and tip of the needle then it will work.
All of the electrospinning parameters are interdependent on each other. Try to increase the distance between the needle and collector plate and increase the applied voltage.
Kiran and Vishal, thanks for your replies. We made the changes you suggested, but we had to constantly change the parameters during the process. Is this a general problem of working with PVA? Could it be related to the device we are using?
You can change the concentration of the PVA solution and try to reduce it and increase the tip-to-collector distance. Yes, until the optimization of the parameters, these problems are faced when working with PVA. If the device provides a proper voltage supply and constant flow rate, it is less likely related to the device.
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