Li Longfei, Peng Fei, Zheng Guoqiang, Dai Kun, Liu Chuntai, Shen Changyu
College of Materials Science and Engineering, The Key Laboratory of Material Processing and Mold of Ministry of Education, Henan Key Laboratory of Advanced Nylon Materials and Application, Zhengzhou University, Zhengzhou 450000, P. R. China.
ACS Appl Mater Interfaces. 2023 Mar 29;15(12):15938-15945. doi: 10.1021/acsami.2c20512. Epub 2023 Mar 14.
In recent years, piezoelectric polymer sensors are used in energy harvesting and self-powered sensing due to their flexibility, low density, and high piezoelectric constant, and their performances may be improved through a careful architectural design. Herein, we reported a facile strategy for fabricating core-sheath piezoelectric fiber (C-PEF) by directly electrospinning poly(vinylidene fluoride) (PVDF) onto the stainless steel wires. Such C-PEF can well respond to bending deformation with different degrees, and therefore it can be assembled into a piezoelectric bending sensor for airflow speed sensing. Furthermore, spring-like structured C-PEF (S-C-PEF) can serve as a piezoelectric spring sensor and in a sophisticated manner monitor human sleep behavior. This work paves a way for developing multigeometric piezoelectric sensors though a low-cost, facile, and reliable method, showing potential applications including bending sensing and health monitoring.
近年来，压电聚合物传感器因其柔韧性、低密度和高压电常数而被用于能量收集和自供电传感，并且通过精心的结构设计可以提高其性能。在此，我们报道了一种通过将聚偏氟乙烯（PVDF）直接静电纺丝到不锈钢丝上来制造核壳压电纤维（C-PEF）的简便策略。这种C-PEF能够很好地响应不同程度的弯曲变形，因此可以组装成用于气流速度传感的压电弯曲传感器。此外，弹簧状结构的C-PEF（S-C-PEF）可以用作压电弹簧传感器，并以复杂的方式监测人类睡眠行为。这项工作通过低成本、简便且可靠的方法为开发多种几何形状的压电传感器铺平了道路，展示了包括弯曲传感和健康监测在内的潜在应用。
