Study on preparation and polarization process of PVDF thin film

Xiaopei Guo; Jun Wang; Jie Ding; Yadong Jiang

doi:10.1117/12.2067861

2 September 2014 Study on preparation and polarization process of PVDF thin film

Xiaopei Guo, Jun Wang, Jie Ding, Yadong Jiang

Proceedings Volume 9284, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronics Materials and Devices for Sensing and Imaging; 92841F (2014) https://doi.org/10.1117/12.2067861
Event: 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2014), 2014, Harbin, China

Abstract

Poly(vinylidene fluoride) (PVDF) is a semi-crystalline polymer, which indicates four different crystalline forms. In this paper, the preparation of nanoscale PVDF thin film was introduced in detail. Initially PVDF was dissolved in the N,N-dimethyl Formamide and acetone mixed solution (volume ratio 1:1). The PVDF films were prepared by spin coating method with different solution concentration, then were characterized by SEM, XRD and FTIR after annealed at different annealing temperatures (60 centigrade to 120 centigrade). Due to the formation of polarized β crystal phase in the annealing process, the pyroelectric coefficient p would be affected by different annealing temperatures. The thermal poling technique of PVDF was also shown in this paper. We investigated the polarization behavior of PVDF when they were subjected to different poling electric fields (from 50 V/μm to 80 V/μm) and poling temperatures (from 90 centigrade to 120 centigrade). For a long enough poling time, the polarization is only related to poling electric filed, while poling temperature affects the poling rate merely. Under the condition of PVDF thin film beforet breakdown, the strongger the poling electric filed intensity, the higher the pyroelectric coefficient is. The pyroelectric coefficient of fibricated PVDF film is 9.0×10^-10C/cm²K after 80v/μm electric field intensity polarization from experiment result.

Citation Download Citation

Xiaopei Guo, Jun Wang, Jie Ding, and Yadong Jiang "Study on preparation and polarization process of PVDF thin film", Proc. SPIE 9284, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronics Materials and Devices for Sensing and Imaging, 92841F (2 September 2014); https://doi.org/10.1117/12.2067861

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