Electrospinning Process is Applied to Tungsten Oxide

Electrospinning technology originated in the 1930s and 1940s. Electrostatic spinning apparatus comprises generally connected to each of the following three parts: a high voltage power supply, a small diameter needle and a capillary tube to collect spinning metal foil, graphite paper collection means.

High voltage power supply for applying a high electric field, so that the charged polymer droplets. Before spinning the polymer droplet collection means reaches solution will evaporate, leaving the crosslinked fibers on spinning collecting device. Needle tube, one end of the high-voltage electrode and the other end connected to the power supply connection collection device containing solution. Droplet surface with a charge of driving under the high pressure will produce the opposite of the surface tension force. With the enhancement of the electric field, the droplets become stretched from the needle by a semi-circular cone, known as the Taylor cone. Taylor cone in the form of droplets ejected from the needle, through the non-stabilized and drawn two processes, thus becomes long and thin, while, as the solvent evaporates, leaving the fibers charged in the After air-curing, arrived on the collection device. Electrospinning the fiber diameter is generally formed about 3nm ~ 1μm.

Electrospinning process can also be applied in the preparation of tungsten oxide. As with WCl6 tungsten source, PVP and DMF were prepared under conditions of 16kV a precursor fibers and prepared at high temperature tungsten oxide nanofibers gas sensing performance as polymer carrier and solvent. With PVB as a carrier by electrostatic spinning process to produce tungsten oxide nanowires have electrochromic properties.

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