الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Nowadays, thanks to the Electrospinning process, polymeric fibers in nanoscale diameters (10-500 nm) are easily producible. During the last decade, the Electrospinning technique has been greatly investigated and developed. One of the most important fields of study on the Electrospinning process is the influence of effective parameters on electrospun nanofibers and nanoweb properties. In this study, using Polyacrylonitrile/DMF polymer solution, three important parameters of the Electrospinning process, including polymer solution concentration,needle diameter, and voltage, were precisely studied. The solution concentration is a very important parameter that affects the nanoweb’ homogeneity and nanofibers’ diameter evenness.Scanning electron microscopy (SEM) analysis of the electrospun nanoweb showed that among five polymer solution concentrations (5, 10, 15, 20, and 25 wt. %), 25 wt. % was more suitable and provided the homogeneity and reproducibility of PAN nanoweb. Morphological investigation and statistical studies showed that the nanofibers’ diameter increased with the increase of needle diameter and polymer concentration.A statistical analysis of the obtained results revealed a high correlation of processing parameters and the average nanofibers’ diameter. All previously mentioned studies helped to define the optimal Electrospinning condition to produce the bead-free, non-branched, and homogeneous PAN Electrospun nanofibers and nano webs.