About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
Symposium
|
Applications
|
Presentation Title |
Free Standing 3D Piezoelectric PVDF Sensors via Electrowriting |
Author(s) |
Kranthi Kumar Reddy Bannuru, Hong Yee Low |
On-Site Speaker (Planned) |
Kranthi Kumar Reddy Bannuru |
Abstract Scope |
Piezoelectric micro-architectures using soft materials are sought for applications in robotic sensors and actuators, wearable electronics, and energy harvesting. The sensitivity of piezoelectric PVDF sensors is attributed primarily to β-crystalline phase with oriented dipoles. The 3D electrowriting process combines mechanical stretching and electric field assisted poling of PVDF in a single step extrusion process that are known to improve electroactive crystalline phases in PVDF. In this work, we demonstrate the fabrication of free-standing 3D PVDF structures with an average individual layer height as small as 30 µm and continuous prints up to >20 layers for multiple designs. The extent of β-phase transformation of PVDF during the process is compared to pvdf in powder form and film using a FT-IR and XRD techniques. Furthermore, the sensors fabricated using 3D PVDF structures is sensitive to various load profiles at varying frequencies with the piezoelectric voltage coefficient (g33) between 1.72E-4 to 4.08E-4 V.m/N. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |