Electrospinning Prepares Tungsten Trioxide Nanofiber

Electrospinning is a special form of polymer electrostatically atomizing fluid, in which case the substance is not split atomizing minute droplets, but is the polymer micro-jets that can run for a long distance, eventually solidified into a fiber. Electrospinning is a special fiber manufacturing process, polymer solution or melt spinning have injection in a strong electric field. In the electric field, the droplets will be made at the needle into conical spherical, and extend from the tip of the cone to obtain a fiber filaments. This way can produce nanoscale diameter polymer filaments. Electrospinning and its manufacturing apparatus is simple, low cost spinning, spinning is used in wide range of materials, and it has become one of the main ways the effective nano fiber material. Electrospinning technique has prepared a wide variety of nano-fibers, including organic, organic / inorganic composite and inorganic nanofibers.

Tungsten trioxide prepared electrospinning nanofibers, the technology can be divided into two steps: preparation and spinning the precursor solution. Precursor gel can be obtained from a mixed polymer solution and tungsten precursor solution. Tungsten precursor is ammonium tungstate solution that was dissolved in dimethylformamide (DMF). Then the two precursor solutions are mixed at room temperature after mixing embrace 15min, then heating it at 50 about ℃24h. Electrospinning process precursor gel is packed in 3ML syringe barrel, adding 21 flat-head stainless steel electrode pin connector to high voltage power supply. The precursor gel pump at 3mL/h during delivery by the injection, the needle and the ground electrode foil target distance is 15cm, where the potential difference is 10kV. Calcinating spun nanofiber 4h at 500 ℃ so that can form tungsten trioxide nanocrystals.

• < Prev
• Next >