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Efficiently Fabricated Core-Sheath Piezoelectric Sensor Based on PVDF Microfibrillar Bundle.

Jiulong Shi¹, Fei Peng¹, Tingting Shan¹

¹School of Physics, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China.

Macromolecular Rapid Communications

|September 6, 2024

Summary

This summary is machine-generated.

Researchers developed a low-cost, high-performance piezoelectric fiber sensor using extrusion molding. This flexible sensor is ideal for self-powered wearable devices, enabling motion monitoring and signal transmission.

Keywords:

PVDF microfibrillar bundle core‐sheath piezoelectric sensor extrusion molding polymer “structuring” processing self‐powered sensing

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Area of Science:

Materials Science
Nanotechnology
Wearable Technology

Background:

Piezoelectric nanogenerators (PENGs) are crucial for self-powered wearable devices.
Piezoelectric fibers offer advantages in weight and flexibility over traditional devices.
Efficient, large-scale fabrication of high-performance piezoelectric fibers remains a challenge.

Purpose of the Study:

To develop a facile, large-scale method for fabricating core-sheath piezoelectric fiber sensors.
To investigate the performance of these sensors for self-powered sensing applications.
To demonstrate the potential of these sensors in wearable electronics.

Main Methods:

Extrusion molding and leaching techniques were employed.
A core-sheath structure was fabricated with a steel wire core (electrode) and PVDF microfibrillar bundle sheath (piezoelectric layer).
The sensor's performance was evaluated under pressing and bending conditions.

Main Results:

The fabricated core-sheath piezoelectric sensor demonstrated significant output voltages (12.3 V in pressing, 0.32 V in bending).
The sensor exhibited sensitive stress responsiveness for self-powered sensing.
Wearable signal transmission and human motion monitoring capabilities were successfully demonstrated.

Conclusions:

A scalable and efficient method for producing high-performance PVDF microfibril-based piezoelectric fiber was established.
This work opens new avenues for developing self-powered sensors using polymer structuring.
The developed piezoelectric fiber sensors show great promise for future wearable device applications.