Abstract
We found an original PVDF film fabrication technique which enable us to turn crystalline structure to beta-phase structure only by solution drop and dry. This method can be applied to printing technology, and we will be able to fabricate printable sensor and actuator in near future. The aim of the present study is to investigate the PVDF crystalline structure change due to a kind of solvent in PVDF solution drop. First, three kinds of solvents (Acetone, DMF and HMPA) are prepared. Second, PVDF powder is mixed with a kind of solvent for 24 h using a magnetic stirrer. Third, the mixed solution is dropped on a glass plate using a micro syringe and is dried in a controllable desiccator. Then, we can obtain three kinds of PVDF films. Finally, the PVDF film crystalline structures are investigated by using X-ray diffraction and Raman spectroscopy.
