Wei Yujie, Yu Ying, Zuo Yuxin, Li Zhikun, Gu Zhiqing, Chen Hongli, Yang Yang, Zuo Chuncheng
School of Mechanical Engineering, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310000, China.
College of Information Science and Engineering, Jiaxing University, Jiaxing, Zhejiang 314000, China.
iScience. 2023 Sep 9;26(10):107852. doi: 10.1016/j.isci.2023.107852. eCollection 2023 Oct 20.
Polymer-ceramic composites are commonly used as flexoelectric films. In existing studies, the flexoelectric effect of composites are generally improved by adjusting the material structures or adding ferroelectric materials. Further improvement of flexoelectric response has encountered a bottleneck. Considering from a new perspective, this study innovatively proposes to prepare the uniformly dispersed BT-PVDF composite films with giant flexoelectric response by surfactant SDS-assisted treatment. According to the engineering applications, tilt sensors have been fabricated with the SDS/BT-PVDF composite films. The prepared tilt sensors can accurately sense the tilt change in a small-angle range (0-10°) between the coaxial connecting parts, the response signal changes significantly (49.25-72.35 mV/°), and the response speed can reach 0.166 s. The research provides a new idea for improving the flexoelectric response and also paves a way for developing tilt sensors through a low-cost, facile, and reliable method, showing potential applications including bending sensing and structural health monitoring.
聚合物-陶瓷复合材料通常用作挠曲电薄膜。在现有研究中，复合材料的挠曲电效应一般通过调整材料结构或添加铁电材料来提高。挠曲电响应的进一步提升遇到了瓶颈。从新的角度考虑，本研究创新性地提出通过表面活性剂SDS辅助处理制备具有巨大挠曲电响应的均匀分散的BT-PVDF复合薄膜。根据工程应用，已用SDS/BT-PVDF复合薄膜制作了倾斜传感器。所制备的倾斜传感器能够在同轴连接部件之间的小角度范围（0-10°）内准确感测倾斜变化，响应信号变化显著（49.25-72.35 mV/°），响应速度可达0.166 s。该研究为提高挠曲电响应提供了新思路，也为通过低成本、简便且可靠的方法开发倾斜传感器铺平了道路，显示出在弯曲传感和结构健康监测等方面的潜在应用。
