“…For instance, due to the need for high surface area in some specific areas such as catalytic systems, sensing materials, membranes in solar cells, filtration, hydrogen storage systems, protective clothing and recently oil absorption, ,,,, the mechanism of porosity evolution within electrospun fibers is of significant and commercial interest which has been able to attract great attention. In literature mechanisms envisaged to formation of pores during electrospinning process could be classified in six main categories: (1) Rapid solvent drying and breath figure formation which can be considered when volatile solvents are employed to prepare electrospinning solutions or polymer–solvent binary system shows an upper critical solution temperature (UCST) phase diagram, ,,,− (2) temperature-induced phase separation (TIPS), (3) nonsolvent-induced phase separation (NIPS), − (4) vapor-induced phase separation (VIPS), ,,,− ,, (5) polymer–polymer phase separation, in which electrospinning is performed with a solution composed of two miscible polymers and followed by leaching process to selectively remove one of components, and (6) interaction of Lewis acid with the Lewis base and subsequent removal of Lewis acid component …”