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A Polymer-based Piezoelectric Vibration Energy Harvester with a 3D Meshed-Core Structure

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Tunable In Situ 3D-Printed PVDF-TrFE Piezoelectric Arrays.

Alec Ikei¹, James Wissman¹, Kaushik Sampath¹

¹Naval Research Laboratory, 4555 Overlook Ave SW, Washington, DC 20375, USA.

Sensors (Basel, Switzerland)

|August 10, 2021

Summary

This summary is machine-generated.

This study introduces in situ 3D printing and poling of poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE), achieving high piezoelectric performance for advanced pressure sensors. This novel method significantly enhances sensitivity and accuracy in 3D-printed sensor arrays.

Keywords:

3D printing PVDF PVDF-TrFE sensors smart materials

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Area of Science:

Materials Science
Polymer Science
Additive Manufacturing

Background:

Poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE) is preferred over PVDF for piezoelectric applications due to superior performance without significant mechanical strain.
Existing methods for poling piezoelectric polymers can be complex and may not integrate seamlessly with 3D printing processes.

Purpose of the Study:

To present a novel in situ 3D printing and poling technique for PVDF-TrFE.
To demonstrate enhanced piezoelectric performance and explore applications in high-sensitivity pressure sensors and sensor arrays.

Main Methods:

Developed an integrated 3D printing and in situ poling process for PVDF-TrFE.
Fabricated and tested 3D-printed PVDF-TrFE samples for piezoelectric coefficient (d33).
Compared in situ poled samples with those prepared using ex situ corona poling.

Main Results:

Achieved a d33 piezoelectric performance of up to 18 pC N-1, an order of magnitude higher than previously reported in situ poled polymer piezoelectrics.
Demonstrated the capability of in situ poled sensors in a fully 3D-printed five-element sensor array.
Confirmed superior performance of in situ poled samples compared to ex situ corona poled samples.

Conclusions:

The in situ 3D printing and poling of PVDF-TrFE offers a significant advancement for creating highly sensitive and accurate pressure sensors.
This technique expands the design possibilities for complex, functional 3D-printed sensor arrays.
The developed method accelerates the development of next-generation piezoelectric devices through integrated additive manufacturing and poling.