Centrifugal spinning is a recent popular method used for nanofiber fabrication with relatively higher productivity compared to other methods. It can be carried out by a solution based or molten based polymeric system. Centrifugal spinning is accomplished through couple of stages such as jet formation, solidification, deposition. With the effect of centrifugal force polymeric material is ejected from the spinning head, in the form of a jet and stretched jet is collected on the cylindrical collector. The most significant stage is to overcome the surface tension of the material, after that is achieved single or multiple jets are formed depending on the design of the spinning head. Centrifugal fiber spinning has been used to produce glass and polymeric fibers for thermal insulation and filtration applications because of high production yield, low cost, simple process, versatility, adatable structure to various forms of materials. Various factors affect the fiber morphology including polymer properties, solution properties, molten polymer properties, centrifugal system properties, environmental conditions and so on. Polymer properties including molecular weight, melt flow index, melt viscosity are the most significant properties to be considered. Solvent type, polymer concentration and solution viscosity are also important in terms of spinnability. Rotational speed (rpm) and spinning head design are most significant factors in terms of system performance. In addition to those, environmental factors such humidity and temperature affect the fiber morphology. In this work, centrifugal spinning and some filtering applications of the fibers fabricated by this technique are given.
Anahtar Kelimeler: Centrifugal spinning, nanofibers, filtration