Fibers prepared by electrospinning have a plenty of extraordinary properties. They have use for many applications across a wide range of fields in medicine and industry, which makes them a useful resource for innovations in various products and technologies. Large specific surface area is main advantage of these fibers. Usually the surface of nano/microfibers is almost smooth. Through the process parameters it is possible to obtain porous surface of individual fibres which leads to the pronounced increase in surface area. Variable technological process in producing nanofibers, which allows us to propound the shape and form of nanofiber structures upon request. Porous fibers may have a variety of uses in numerous applications because they show even larger specific surface area compared to smooth fibers. One of the possible method to evaluate the increase of the surface area is HR-SEM image analysis. The work demonstrates the usage of method enabling the assessment of porosity contribution to increase in micro/nanofiber surface area.Keywords: porous fibers, electrospinning, surface morphology, micro/nanofibers, structure
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