Department of Electrical Engineering, Nambu University, Gwangju 62271, South Korea.
Department of Health Administration, Kwangju Women's University, Gwangju 62396, South Korea.
J Nanosci Nanotechnol. 2020 Jan 1;20(1):373-378. doi: 10.1166/jnn.2020.17229.
Calcium nitrate tetra-hydrate [Ca(NO₃)₂·4H₂O]-doped polyvinylidene fluoride (PVDF) thin films were successfully prepared by mixing 0.2-g-calcium nitrate into a PVDF solution under ultrasonification. The mixed solution was electrostatically spray coated onto aluminum foil substrates and then heat treated at 120 °C for 60 min in air. X-ray diffraction and Fourier transform infrared spectroscopy were used to confirm the crystal structure and chemical bonding conformation. A morphological characterization of the layers was performed using a scanning electron microscope. The dielectric properties of the samples were analyzed as a function of the variation of frequency. A piezoelectric characterization of the samples was performed by an electrical reaction of the layers after a single compression was applied from the impact of a pendulum. The structural and piezoelectric properties of the thin films could be related to the electroactive phases in the Ca-doped PVDF thin films.
硝酸钙四水合物 [Ca(NO₃)₂·4H₂O]-掺杂聚偏二氟乙烯 (PVDF) 薄膜通过将 0.2 克硝酸钙在超声作用下混入 PVDF 溶液中成功制备。混合溶液通过静电喷涂涂覆在铝箔基底上，然后在空气中于 120°C 下热处理 60 分钟。X 射线衍射和傅里叶变换红外光谱用于确认晶体结构和化学键合构象。使用扫描电子显微镜对层进行形貌表征。通过对层施加单次压缩后的电反应来进行样品的压电特性表征，该压缩是由摆锤冲击引起的。薄膜的结构和压电性能可能与掺杂 PVDF 薄膜中的电活性相有关。
