On-demand fabrication of piezoelectric sensors for in-space structural health monitoring
On-demand fabrication of piezoelectric sensors for in-space structural health monitoring
复制标题
DOI：
10.1088/1361-665x/ad3d16
复制
发表时间：
2024-05-01
影响因子：
4.1
通讯作者：
Deng，Zhangxian
中科院分区：
文献类型：
--
作者：
White，Amanda;Little，Isaac;Deng，Zhangxian
充气结构有望用于未来的深空探测任务，但容易受到微流星体和轨道碎片撞击的破坏。聚偏氟乙烯-三氟乙烯(PVDF-TrFE)是一种柔性的、生物相容的、耐化学的材料，由于其压电性，能够检测冲击力。这项研究使用了最先进的材料挤压系统，该系统已被验证可用于空间制造，以促进一致和均匀的PVDF-TrFE薄膜的快速成型。通过系统地研究油墨合成、打印机设置和后处理条件，本研究建立了对印刷PVDF-TrFE的工艺-结构-性能关系的全面了解。因此，这项研究始终如一地实现了厚度约40微米的聚偏氟乙烯-TrFE薄膜的印刷，并伴随着高达25 pC N−1的令人印象深刻的压电系数。此外，通过将商业导电银墨与定制的PVDF-TrFE油墨混合印刷，生产了具有1.18VN−1灵敏度的全印刷动态力传感器。这种开创性的PVDF-TrFE薄膜按需制造技术使未来的宇航员能够在太空中设计和制造压电传感器，从而显著提高深空探测任务的可负担性和可持续性。
Inflatable structures, promising for future deep space exploration missions, are vulnerable to damage from micrometeoroid and orbital debris impacts. Polyvinylidene fluoride-trifluoroethylene (PVDF-trFE) is a flexible, biocompatible, and chemical-resistant material capable of detecting impact forces due to its piezoelectric properties. This study used a state-of-the-art material extrusion system that has been validated for in-space manufacturing, to facilitate fast-prototyping of consistent and uniform PVDF-trFE films. By systematically investigating ink synthesis, printer settings, and post-processing conditions, this research established a comprehensive understanding of the process-structure-property relationship of printed PVDF-trFE. Consequently, this study consistently achieved the printing of PVDF-trFE films with a thickness of around 40 µm, accompanied by an impressive piezoelectric coefficient of up to 25 pC N− 1. Additionally, an all-printed dynamic force sensor, featuring a sensitivity of 1.18 VN− 1, was produced by mix printing commercial electrically-conductive silver inks with the customized PVDF-trFE inks. This pioneering on-demand fabrication technique for PVDF-trFE films empowers future astronauts to design and manufacture piezoelectric sensors while in space, thereby significantly enhancing the affordability and sustainability of deep space exploration missions.