1.2.3.1.2 Free solution spinning methods

In this electrospinning setup, two layers were used: the lower layer was ferromagnetic and the upper layer was polymer solution (Table 4). When electrospinning


A. The polymer arrangement was filled; the supply and the stature of fluid surface were higher than that of electrode and tube. By turning on gradually the pneumatic weight control valve, we could discover a few air pockets created at the pinnacle of tube. The delivered air pockets will be broken down into smaller ones on the arrangement surface. At the point when surface strain of the little air pockets lessens to the basic esteem which can be overcome by the connected electric field, nano-planes discharge from the peak of the air pockets. Nanofibers that are produced from this method have very fine diameter of 50 nm [43].

B. This is a new method to produce nanofiber with a single bubble electrospinning process which is a concept based on keeping the bubble from bursting during electrospinning. Compress gas was supplied to porous surface. This porous surface was placed below the polymer solution. When gas was supplied to this surface, bubbles were produced that formed charged polymer jets [44].

### Table 3.

Bubble electrospinning methods.

Table 4. Free solution electrospinning methods.

Classification of Electrospinning Methods DOI: http://dx.doi.org/10.5772/intechopen.88654

process was started, a customary electric field was utilized to the gadget; steady vertical spikes of attractive suspension were formed. When high voltage was applied, electrified jets undertake strong stretch by the electric field, solvent evaporates, and solidified nanofibers deposit on the upper counter electrode [45].
