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Updated: Jul 4, 2025

A Polymer-based Piezoelectric Vibration Energy Harvester with a 3D Meshed-Core Structure
Published on: February 20, 2019
Interface Optimizing Core-Shell PZT@Carbon/Polyurethane Composites with Enhanced Passive Piezoelectric Vibration
Wenzheng Chen1, Xiaoling Lu2, Qitan Zheng1
1State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
This study introduces novel carbon-coated piezoelectric composites (PZT@C/PU) that significantly enhance damping and vibration attenuation. The carbon coating strategy effectively boosts piezoelectric performance, improving overall material damping capabilities.
Area of Science:
- Materials Science
- Composite Materials
- Nanotechnology
Background:
- Piezoelectric materials enhance damping and vibration attenuation in composites.
- Previous research focused on isolating mechanical and piezoelectric damping contributions.
- Limited studies explored methods to improve piezoelectric damping in polymer-based piezoelectric composites (PPCs).
Purpose of the Study:
- To develop novel polyurethane (PU)-based piezoelectric composites with enhanced piezoelectric damping ability.
- To investigate the mechanism of improved piezoelectric damping via a carbon coating strategy.
- To decouple and analyze mechanical and piezoelectric damping contributions.
Main Methods:
- Fabrication of carbon-coated piezoelectric fillers (PZT@C) within a PU matrix.
- Theoretical decoupling of mechanical and piezoelectric damping.
- Comparative analysis with composites using non-piezoelectric fillers.
- Characterization of damping ability, ductility, sound isolation, and vibration attenuation.
Main Results:
- PZT@C/PU composites demonstrated prominent damping (loss factor tan δmax = 1.0, tan δRT = 0.3).
- Composites exhibited excellent ductility (400.63%) and sound isolation (transmission loss TL > 23 dB).
- Sandwich structural damping devices showed outstanding vibration attenuation (damping ratio ζ = 0.198).
Conclusions:
- Carbon coating on piezoelectric fillers effectively enhances the damping performance of PU-based piezoelectric composites.
- The enhanced piezoelectric performance due to carbon coating is the key mechanism for improved damping.
- These materials show significant potential for vibration and noise reduction applications.
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