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Electrospinning Technique on PEO Nanofibers
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  • It is unfortunate that the author has not given an attribution for the source image used in slide 3 as required in the usage licence for that image. The diagram was produced by researchers at the New Zealand Institute for Plant and Food Research as part of their work on electrospinning technologies and materials.
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  • 1. Translational And RotationalTarget Effect On ElectrospunNanofibersJosé A. Cruz-ArzónEdwin J. AlvaradoDr. Wilfredo OtañoMr. Brian VélezMs. Claudia Colón
  • 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. 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. Procedure Overview Non-aligned electrospun nanofiber synthesis. Characterized for comparison with previouslysynthetized aligned electrospun nanofibers.
  • 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. 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. Non-Aligned Electrospinning + Pd Aligned Electrospinning + PdResults
  • 8. Future Work Fibers calcination for 2 hours at 325 ºC, evaporating thefibers thus isolating the Palladium shells. Future determination of sensor prowess.
  • 9. Aligned Electrospinning + Pd + 325 ºCCalcination“shells”
  • 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. QUESTIONS?