Electrospinning is one of the methods for obtaining nano/microfibers, using polymeric solutions. These nanofibrous
membranes are highly porous with interconnected pores, having high specific surface area and small pore size, making
them a suitable candidate for filtration applications. The properties of electrospun fibers are influenced by polymer
solution, solvent, solution concentration, viscosity, electrical conductivity, electrical voltage, spinneret to collector
distance etc. Expanded polystyrene is a polymeric product that is usually used for insulation and packaging. Recycling
expanded polystyrene into nanofibers with applications in filtration could be useful from an economic point of view. The
purpose of this study was to investigate the influence of expanded polystyrene polymer solution characteristics
(concentration, viscosity) and the process parameters (applied voltage, distance between the tip and the collector plate,
flow rate of the polymer solution) on the morphology and the properties of the obtained electrospun fibers. Therefore,
three EPS solutions with 10, 15 and 20% wt. concentration were prepared and were electrospun under processing
conditions with an applied voltage of 12, 15 and 18 kV, a spinneret-to-collector distance of 20 cm, a flow rate of solution
of 1.5 and 2 mL/hour, a spinneret diameter of 0.8 mm and stationary copper substrate. The morphology of the
electrospun fibers was observed by scanning electron microscopy. The mechanical properties were evaluated by tensile
strength and elongation tests.
The objective of this work was the preparation of cellulose acetate nanofibers by electrospinning using a mixture
of solvents. Cellulose acetate solutions were electrospun from binary and ternary solvent systems, such as
N,N-dimethylformamide, acetone and chloroform. The effects of the solvent systems on the structural, morphological
and mechanical characteristics of the fibers were investigated.
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