Electrospinning Technique on PEO Nanofibers

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Electrospinning Technique on PEO Nanofibers

  1. 1. Translational And RotationalTarget Effect On ElectrospunNanofibersJosé A. Cruz-ArzónEdwin J. AlvaradoDr. Wilfredo OtañoMr. Brian VélezMs. Claudia Colón
  2. 2. Introduction What is a nanofiber? Fiber with diameter less than 100 nm. Why use a nanofiber? high surface-to-volume ratio, high porosity, improvedphysicochemical properties Electrospinning Electrostatic production of fibers.Aligned Electrospinning (Katta et al. 2004)
  3. 3. Problem Does having a rotating and translating target affect thealignment of electrospun nanofibers?Objective To determine effect of aligned electrospinning onnanofibers.Hypothesis Having rotational and x-translational target will produceuniform fibers.
  4. 4. Procedure Overview Non-aligned electrospun nanofiber synthesis. Characterized for comparison with previouslysynthetized aligned electrospun nanofibers.
  5. 5. Electrospinning The solution will run from the anode (syringe to thecathode 1ml of the 3% PEO / 95% ethanol stock solutionelectrospun at 0.50ml/hour at 20.0 KV
  6. 6. Sputtering The atoms of the target deposit on the substrate bydiffusion and electrical conductivity. The metal will deposit on the fiber, forming a thin pellicleor film denominated “shell”.
  7. 7. Non-Aligned Electrospinning + Pd Aligned Electrospinning + PdResults
  8. 8. Future Work Fibers calcination for 2 hours at 325 ºC, evaporating thefibers thus isolating the Palladium shells. Future determination of sensor prowess.
  9. 9. Aligned Electrospinning + Pd + 325 ºCCalcination“shells”
  10. 10. References1. Katta P, Alessandro M, Ramsier R D, Chase GG. 2004.Continuous electrospinning of aligned polymer nanofibersonto a wire drum collector. Nano Lett [Internet]. 4(11):2215-8.
  11. 11. QUESTIONS?

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