3D Printed Flexible Piezoelectric Sensors for Integrated Hybrid Electronics

Area of Science:

• Materials Science
• Additive Manufacturing
• Robotics

Background:

• Smart materials, particularly piezoelectrics, are vital for responsive systems due to their sensing and actuating capabilities.
• 3D printing offers a platform for integrating smart materials into complex, multifunctional devices.

Purpose of the Study:

• To develop a direct-ink-writing (DIW) 3D printing method for flexible piezoelectric devices.
• To optimize electrical poling conditions for enhanced piezoelectric performance.
• To demonstrate the fabrication of functional smart devices using 3D printed piezoelectric materials.

Main Methods:

• Utilized solution-processed poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE) as the functional ink for DIW 3D printing.
• Conducted ferroelectric and actuation-based characterizations to optimize poling.
• Fabricated three proof-of-concept devices: a wearable human-machine interface, an electronic skin, and a hybrid electronic system.

Main Results:

• Achieved high-performance 3D printed PVDF-TrFE transducers with a d₃₁ coefficient of 12.70 ± 0.71 pC·N^-1.
• Successfully fabricated functional wearable piezoelectric sensors and integrated them into smart devices.
• Demonstrated the versatility of 3D printing for creating multifunctional hybrid electronic systems.

Conclusions:

• 3D printing is a viable method for fabricating high-performance piezoelectric materials and devices.
• The developed approach enables the creation of wearable piezoelectric sensors for various applications.
• 3D printing facilitates the seamless integration of multifunctional hybrid electronic systems.