Self-sensing composite material based on piezoelectric nanofibers

Materials & Design

Maria Elena Gino¹  Riccardo D'Anniballe¹  Tommaso Maria Brugo²  Davide Fabiani²  Giacomo Selleri³  Johnnidel Tabucol⁴  Raffaella Carloni⁴  Andrea Zucchelli⁵  Maria Letizia Focarete⁵ 

[1] Corresponding authors.;Department of Chemistry “Giacomo Ciamician” and INSTM UdR of Bologna, University of Bologna, via Selmi 2, 40126 Bologna, Italy;Department of Electrical, Electronic, and Information Engineering, University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy;Department of Industrial Engineering, University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy;Faculty of Science and Engineering – Bernoulli Institute for Mathematics, Computer Science and Artificial Intelligence, University of Groningen, Nijenborgh 9 9747 AG, Groningen, the Netherlands;

关键词: Composite;    Poly(vinylidenefluoride-trifluoroethylene) (PVDF-TrFE);    Piezoelectric;    Flexible sensor;    Smart material;   

DOI  :  

来源: DOAJ

【 摘 要 】

Recently, efforts have been made to manufacture self-sensing smart composites by integrating piezoelectric sensors with laminates. However, the interleaving of pressure sensors, such as piezoelectric polymeric films, dramatically reduces the impact resistance of the hosting laminates, and consequently, delamination can occur. This study aimed to fabricate a self-sensing composite material by embedding piezoelectric nanofibers of poly(vinylidenefluoride-trifluoroethylene) (PVDF-TrFE) in a polymeric elastic matrix and carbon black-based electrodes to detect a piezoelectric signal. The mechanical and electrical properties of the self-sensing laminate were maintained after 106 fatigue test cycles. By appropriately tuning the parameters of the acquisition circuit, the sensor could measure not only impulsive loads but also low-frequency loads as low as 0.5 Hz. A piezoelectric model with lumped parameters for the polarization process and piezoelectric response of the nanofibers is proposed and validated by experimental results. As a proof of the model, the piezoelectric nanofiber sensors were embedded in a prosthetic carbon fiber sole, and the piezoelectric signal response closely followed the ground reaction force with a sensitivity of 0.14 mV/N.

【 授权许可】

Unknown