I have tried PCL with DCM and there was spiral effect. After that I tried Chloroform still there was spiral effect. Later on I try with THF but it seems it was evaporated quicker than DCM though it has high boiling temperature than DCM. Why I am unable to make fiber with THF? What can be the solution?
Dear Sudipta
Could you please explain what you mean with spiral effect?
Whenever you spin with fast evaporating solvents a gas shield as reported by Larsen is recommended. See an applied example from M.Putti.
Larsen et. al DOI: 10.1002/adma.200306021
Putt et al. http://dx.doi.org/10.1016/j.polymer.2015.03.006
I mean the bending or whipping effect. But I also tried with DMF to PCL but there was no bending or whipping effect.
A suggestion would be to prepare binary solvent system of THF and other good electrospinning solvents. THF is miscible with almost all organic solvents.
You might want to look into this paper.
http://www.sciencedirect.com/science/article/pii/S0014305715000403
Dear Sudipta
salam
As you know, each solvent have many physical properties, such as electroconductivity, dielectric constant, surface tension, vapor temperature and so on.
The THF is a very volatile solvent and sometimes the solution of this solvent doing solidifcation in the near space after the nozzle and the fiber being completely solid. So you can see your spiral effect.
cheers
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