On the Fabrication of Innovative La-Doped ZnO-Reinforced PVDF-Based Pressure Sensors
摘要
The potential of piezoelectric materials in pressure sensors has been widely investigated to prepare the surgical solutions for human and veterinary patients. Polyvinylidene fluoride (PVDF)-ZnO composite matrix as scaffolds and implants have also been reported for biomedical applications. However, little has been reported on a lanthanum (La)-doped ZnO-reinforced PVDF thermoplastic-based composite matrix as a pressure sensor for the health monitoring of veterinary patients. This study outlines investigations into the fabrication of a PVDF-4 wt.% (La-doped ZnO) feedstock for fused filament fabrication (FFF) of functional pressure-sensing parts. Based on trials, PVDF-4% La (1-3%)-doped ZnO compositions/proportions were prepared for feedstock fabrication. The mechanical, thermal, bonding, and morphological properties of the composite matrices have been investigated to determine the optimal proportions for 3D-printed pressure-sensing devices in condition-monitoring applications. The results of the study, supported with morphological analysis, indicated that 96% PVDF-4% ZnO with La (3%) doping exhibits acceptable mechanical properties (in terms of modulus of toughness of 1.553 ± 0.01 MPa), thermal stability (with a heat capacity of −42.81 J/g), and bonding properties suitable for proposed 3D-printed conformal pressure sensors. The resonance frequency of 2.32 GHz for PVDF-4% La-doped ZnO composites indicates its potential for pressure-sensing applications.