研究目的
Investigating the relationship between piezoelectric power generation and molecular orientation in stretched P(VDF/TrFE) films for vibration energy harvesting applications.
研究成果
The study demonstrated that molecular orientation in P(VDF/TrFE) films significantly affects piezoelectric properties and power generation. Optimal performance was achieved when the polymer chains were aligned parallel to the cantilever's longitudinal direction, suggesting potential for efficient vibration energy harvesters in environmental applications.
研究不足
The study focuses on uniaxially stretched films; biaxial stretching or other orientations were not explored. The environmental vibration frequency range is limited to around 25 Hz.
1：Experimental Design and Method Selection:
Fabrication of cantilever-type energy harvesters using uniaxially stretched P(VDF/TrFE) films. Evaluation of molecular orientation via polarized FT-IR spectra measurement.
2：Sample Selection and Data Sources:
P(VDF/TrFE) films were prepared by spin-coating and stretched uniaxially.
3：List of Experimental Equipment and Materials:
Laser Doppler vibrometer, optical microscope (Ono Sokki LV-1720), poly(ethylene naphthalate) (PEN) substrate, Al electrodes.
4：Experimental Procedures and Operational Workflow:
Films were stretched, annealed, and electrodes were deposited. Piezoelectric properties and power generation were measured under mechanical vibrations.
5：Data Analysis Methods:
Piezoelectric coefficient and output power were calculated from displacement and voltage measurements.
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