Hou Dafei, Kong Xiangdong, Feng Keliang, Zhou Kai, Pei Yijin, Shentu Yudie, Xiang Fangjie
School of Intelligent Manufacturing, Taizhou University, Taizhou, 318000, Zhejiang, China.
College of Machinery and Energy, Zhejiang Institute of Science and Technology, Hangzhou, Zhejiang Province, China.
Sci Rep. 2025 Jul 1;15(1):20481. doi: 10.1038/s41598-025-05175-x.
Metal-core piezoelectric fibers (MPF)are coaxial fibers composed of a metal core, piezoelectric material, conductive material, and insulating material. They possess piezoelectric effects and hold great application potential in sensors and intelligent products. The most commonly used preparation method for metal-core piezoelectric fibers is electrospinning. However, this method is extremely sensitive to process parameters. It demands high voltage control, and it is difficult to precisely adjust the solution concentration and viscosity. This makes it challenging to manufacture piezoelectric fibers with global dynamic sensing capabilities, resulting in unstable product quality, such as uneven fiber diameters and internal structural defects, which restricts the application of metal-core piezoelectric fibers. In this research, metal-core piezoelectric fibers were prepared via a double heat-shrinkage thermoplastic approach, employing single thermoplastic piezoelectric polyvinylidene fluoride (PVDF) tubes and thermoplastic insulating silicone tubes. This study constructed a testing platform for metal-core piezoelectric fibers to explore their piezoelectric, impact, vibration, and durability attributes. The stability and consistency of the piezoelectric properties throughout the entire domain were also evaluated. The experimental outcomes demonstrate that the metal-core piezoelectric fibers fabricated herein not only possess a straightforward manufacturing process and low equipment cost but also display high manufacturing efficiency and excellent cross-sectional coaxiality. They exhibit remarkable response and feedback capabilities and can be applied to monitor the dynamic performance of piezoelectric fibers across the whole domain. This offers a novel concept for the large-scale and efficient production of metal-core piezoelectric fibers with stable performance.
金属芯压电纤维（MPF）是由金属芯、压电材料、导电材料和绝缘材料组成的同轴纤维。它们具有压电效应，在传感器和智能产品中具有巨大的应用潜力。金属芯压电纤维最常用的制备方法是静电纺丝。然而，这种方法对工艺参数极其敏感。它需要高压控制，并且难以精确调节溶液浓度和粘度。这使得制造具有全局动态传感能力的压电纤维具有挑战性，导致产品质量不稳定，如纤维直径不均匀和内部结构缺陷，这限制了金属芯压电纤维的应用。在本研究中，通过双热收缩热塑性方法制备金属芯压电纤维，采用单热塑性压电聚偏氟乙烯（PVDF）管和热塑性绝缘硅管。本研究构建了一个金属芯压电纤维测试平台，以探索其压电、冲击、振动和耐久性属性。还评估了整个区域内压电性能的稳定性和一致性。实验结果表明，本文制备的金属芯压电纤维不仅制造工艺简单、设备成本低，而且具有高制造效率和优异的横截面同轴度。它们表现出显著的响应和反馈能力，可应用于监测整个区域内压电纤维的动态性能。这为大规模、高效生产性能稳定的金属芯压电纤维提供了一种新的概念。
