| URN |
etd-0831111-160013 |
|---|
| Author |
Hao-Wei Lai |
|---|
| Author's Email Address |
No Public. |
|---|
| Statistics |
This thesis had been viewed 454 times. Download 0 times. |
|---|
| Department |
Mechanical and Electro-Mechanical Engineering |
|---|
| Year |
2010 |
|---|
| Semester |
2 |
|---|
| Degree |
Master |
|---|
| Type of Document |
|
|---|
| Language |
zh-TW.Big5 Chinese |
|---|
| Title |
Research and Analysis on Piezoelectric Properties of Near-field Electrospinning PVDF Nanofiber |
|---|
| Date of Defense |
2011-06-29 |
|---|
| Page Count |
84 |
|---|
| Keyword |
Near-field electrospinning
PVDF
Micro-transducer
Energy Harvest
MWCNT
Piezoelectric fiber
|
|---|
| Abstract |
In this study, with near-field electrospinning technique of PVDF (Polyvinylidene fluoride) piezoelectric nano-fibers and the additional multiwalled-carbon nanotubes(MWCNT), both mechanical strength and piezoelectric characteristics of a single nano-fiber were discussed. Then the behavior of piezoelectric fiber actuators was realized using inverse piezoelectric effect. Near-field electrostatic technology can be used to fabricate PVDF piezoelectric fibers with an excellent piezoelectric property compared with film structures due to a higher piezoelectric coefficient and energy conversion efficiency. It is more suitable to produce micro transducers. By adjusting velocity of a fully parametric x-y stage, DC voltage, and the distance between the needle and collection plate, the morphology and polarization intensity of piezoelectric fiber can fully be controlled. In addition, the optimal parameters of PVDF solution such as PVDF powder weight percentage and MWCNT were also discussed. From the observation of XRD (X-ray diffraction), it reveals a high diffraction peak at 2θ=20.8° of piezoelectric crystal β-phase structure. Finally, the actuation property was tested using DC voltage supply, and fiber has significant deflection in the experiment. The vertical deflection can be observed and compared with model solution of piezoelectric cantilever structure. In the fiber’s direct piezoelectric effect, the result shows that fiber can produce an open circuit voltage of 15mV under a low frequency vibration of 7Hz. |
|---|
| Advisory Committee |
Chi-Hui Chien - chair
Ying-Chung Chen - co-chair
Shyh-Chour Huang - co-chair
Ceng-Teng Pan - advisor
|
|---|
| Files |
Indicate in-campus at 5 year and off-campus access at 5 year. |
|---|
| Date of Submission |
2011-08-31 |
|---|
