温度和储存时间对聚（偏二氟乙烯-三氟乙烯）超薄膜极化特性的影响机制

Li Xingjia, Shi Zhi, Zhang Xiuli, Meng Xiangjian, Huang Zhiqiang, Zhang Dandan

School of Mathematics, Physics and Statistics, Shanghai University of Engineering Science, Shanghai 201620, China.

Research Center for Advanced Mirco-and Nano-Fabrication Materials, Shanghai University of Engineering Science, Shanghai 201620, China.

Membranes (Basel). 2021 Apr 21;11(5):301. doi: 10.3390/membranes11050301.

The effect of testing temperature and storage period on the polarization fatigue properties of poly (vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) ultrathin film devices were investigated. The experimental results show that, even after stored in air for 150 days, the relative remanent polarization (Pr/Pr(0)) of P(VDF-TrFE) of ultrathin films can keep at a relatively high level of 0.80 at 25 °C and 0.70 at 60 °C. To account for this result, a hydrogen fluoride (HF) formation inhibition mechanism was proposed, which correlated the testing temperature and the storage period with the microstructure of P(VDF-TrFE) molecular chain. Moreover, a theoretical model was constructed to describe the polarization fatigue evolution of P(VDF-TrFE) samples.

研究了测试温度和储存时间对聚（偏二氟乙烯-三氟乙烯）（P(VDF-TrFE)）超薄膜器件极化疲劳性能的影响。实验结果表明，即使在空气中储存150天后，P(VDF-TrFE)超薄膜在25℃时的相对剩余极化强度（Pr/Pr(0)）仍可保持在较高水平0.80，在60℃时为0.70。为了解释这一结果，提出了一种氟化氢（HF）形成抑制机制，该机制将测试温度和储存时间与P(VDF-TrFE)分子链的微观结构联系起来。此外，构建了一个理论模型来描述P(VDF-TrFE)样品的极化疲劳演变。