What is the effect of concentration aginst the dielectric property of the solvent in Near field or far field electrospinning? Has it any effect on fiber diameter?
As far as I know, the concentration of the material would affect the diameter of the fabric construct. Higher concentration can give you larger diameters (I guess), and even the distance from the needle's tip to the collector is important. With smaller distances you can make ribbons which can be interesting for some applications.
The electrical property of the solvent is of ionic conductivity which is due to ion movement through the polymer solution. Taking this in mind, the higher concentration of the polymer can inhibit the ionic movement and lead to lower conductivity of the total system; however, there is a critical point which is special for each application. You need to personalize all the parameters for your experiment and then make your fabric. The input voltage, the gas flow in the chamber, the distance between needle's tip and the collector, type of the collector (stationary or dynamic and the shape), etc.
One more query that, is there any relationship between Solvent boiling temperature and solvent dielectric property? does they effect each other?
Materials which has a permanent dipole, express a dielectric constant as a function of temperature which is due to the alignment of the dipoles in the material. You can read a lot looking at the following link:
http://www.doitpoms.ac.uk/tlplib/dielectrics/temperature.php
Usually, at a certain temperature, the dielectric constant will jump up and then will be decreased by increasing the temperature.
If a material has a higher boiling point than another one, there is a difference dielectric constant which is attainable at higher temperatures. But, it needs a further reading of the literature.
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