Presentation Information
[16a-PA7-5]Structural control of poly(vinylidene fluoride) thin films using alkali halides
Saori Ando1, 〇Yasuko Koshiba1,2, Yusuke Maeda4, Shinya Kawano4, Akiyama Azumi1,2, Shohei Horike1,2,3, Kenji Ishida1,4, Masahiro Funamashi1,2 (1.Kobe Univ., 2.Res. Ctr. Membrane & Film Tech., Kobe Univ., 3.Ctr. Environ. Mgmt., Kobe Univ., 4.Kyushu Univ.)
Keywords:
organic ferroelectrics,alkali halide,structural control
Poly(vinylidene fluoride) (PVDF), a ferroelectric polymer, exhibits several crystalline phases, among which the phase I crystal structure shows the highest spontaneous polarization. Since the most stable structure of PVDF is the paraelectric phase II crystal structure, structural control toward phase I or phase III is required to induce ferroelectricity. In this study, we focus on the interaction between PVDF and alkali halides during thin-film formation. Thin films were fabricated by spin coating from PVDF solutions containing various alkali halides, and their crystalline structures and electrical properties were evaluated.