Title page for etd-0813112-141632


[Back to Results | New Search]

URN etd-0813112-141632
Author Zong-Yu Ou
Author's Email Address No Public.
Statistics This thesis had been viewed 5335 times. Download 357 times.
Department Mechanical and Electro-Mechanical Engineering
Year 2011
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title New cylindrical near-field electrospun PVDF fibers
Date of Defense 2012-07-21
Page Count 86
Keyword
  • electrospinning
  • flexible substrate
  • energy harvesting
  • cylinder
  • polyvinylidene fluoride (PVDF)
  • piezoelectric fiber
  • Abstract In this study, a cylindrical near-field electrospining (CNFES) process will be used to fabricate permanent piezoelectricity of polyvinylidene fluoride (PVDF) piezoelectric fibers, and a piezoelectric fiber harvesting device with parallel electrode was fabricated to capture ambient energy. First, the PVDF powder was mixed in acetone solution uniformly and the dimethyl sulfoxide (DMSO) was mixed with fluorosurfactant to prepare PVDF macromolecular solution. The PVDF macromolecular solution was filled in a metals needle injector and contacted a high power supply, after the PVDF drops in the needle was subjected to high electric field, the drops became a Taylor cone and overcame surface tension of the solution itself, extremely fine PVDF fiber was formed and jetted out. The fibers were collected numerous and quickly by homemade cylindrical collector and the diameter of fiber could be controlled easily by adjusting the rotating speed of the cylinder and the electric field. From the observation of XRD (X-ray diffraction), it reveals a high diffraction peak at 2θ=20.7° of piezoelectric crystal β-phase structure by adjusting PVDF concentrations and DC voltage. By providing 7Hz shake and 0.23% strain, the piezoelectric fiber harvesting device with parallel electrode could generate 76mV; by providing 7Hz shake and 0.14% strain, the device could generate 1.1nA.
    Advisory Committee
  • J. C. Huang - chair
  • M. L. Wu - co-chair
  • S. C. Huang - co-chair
  • C. T. Pan - advisor
  • Files
  • etd-0813112-141632.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2012-08-13

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have more questions or technical problems, please contact eThesys