Ikei Alec, Wissman James, Sampath Kaushik, Yesner Gregory, Qadri Syed N
Naval Research Laboratory, 4555 Overlook Ave SW, Washington, DC 20375, USA.
Sensors (Basel). 2021 Jul 24;21(15):5032. doi: 10.3390/s21155032.
In the functional 3D-printing field, poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE) has been shown to be a more promising choice of material over polyvinylidene fluoride (PVDF), due to its ability to be poled to a high level of piezoelectric performance without a large mechanical strain ratio. In this work, a novel presentation of in situ 3D printing and poling of PVDF-TrFE is shown with a d33 performance of up to 18 pC N-1, more than an order of magnitude larger than previously reported in situ poled polymer piezoelectrics. This finding paves the way forward for pressure sensors with much higher sensitivity and accuracy. In addition, the ability of in situ pole sensors to demonstrate different performance levels is shown in a fully 3D-printed five-element sensor array, accelerating and increasing the design space for complex sensing arrays. The in situ poled sample performance was compared to the performance of samples prepared through an ex situ corona poling process.
在功能性3D打印领域，聚（偏二氟乙烯 - 三氟乙烯）（PVDF-TrFE）已被证明是比聚偏二氟乙烯（PVDF）更有前景的材料选择，因为它能够在不产生大的机械应变比的情况下被极化到高水平的压电性能。在这项工作中，展示了一种新颖的PVDF-TrFE原位3D打印和极化方法，其d33性能高达18 pC N-1，比先前报道的原位极化聚合物压电材料大一个多数量级。这一发现为具有更高灵敏度和精度的压力传感器铺平了道路。此外，在全3D打印的五元传感器阵列中展示了原位极化传感器呈现不同性能水平的能力，加速并扩大了复杂传感阵列的设计空间。将原位极化样品的性能与通过非原位电晕极化工艺制备的样品的性能进行了比较。
