Abstract
The effect of the concentration of polyvinylbutyral solution on the process throughput and fibre properties was studied in needle and roller electrospinning. Whereas the polymer throughput is an optional independent parameter in needle electrospinning, it is a dependent parameter that is affected by both the material and process parameters in roller electrospinning. Polymer throughput increases considerably with an increasing concentration of polymer solutions in roller electrospinning. The properties of the nanofibers and the quality of the nanofiber layers were also studied. Fibre diameters increase with an increasing concentration in both techniques. Fibre diameters produced by needle electrospinning are smaller than those produced by roller electrospinning. The distribution of fibre diameters is rather narrow and not significantly dependent on the concentration of solutions in either technique.
Highlights
In recent years, polymer nanofibres have gained considerable attention as promising materials with many possible areas of application, due to their unique properties such as a high specific surface area, small pore diameters, high surface to weight ratio, good barrier characteristics against microorganisms and fine particles, high surface energy, good strength per unit weight, and covering effects [1–11]
Fibre diameters produced by needle electrospinning are smaller than those produced by roller electrospinning
The dependencies of the fibre diameters produced by both techniques on the viscosity of solutions are shown in Figures 5 and 7
Summary
Polymer nanofibres have gained considerable attention as promising materials with many possible areas of application, due to their unique properties such as a high specific surface area, small pore diameters, high surface to weight ratio, good barrier characteristics against microorganisms and fine particles, high surface energy, good strength per unit weight, and covering effects [1–11]. There are several methods to produce fibres at a nanoscale [12–16]. A polymer solution is forced through a hollow needle, and a high voltage is applied to the polymer solution coming out at the needle tip (Figure 1). Another method for producing nanofibres was developed by Jirsak et al [17]. This method is called roller electrospinning, and known under the name Nanospider (Figure 2). Roller electrospinning is a viable route for the production of exceptionally continuous and uniform polymer nanofibres
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