Graphene enhanced flexible piezoelectric transducers for dynamic strain measurement: from material preparation to application

Abstract In this study, graphene particles are introduced to the lead magnesium niobate-lead titanate and polyvinylidene fluoride (PVDF) form a flexible ternary composite. The concentration is rigorously designed morphologically optimized, warranting good piezoelectric dielectric properties. performances greatly increased compared with pure PVDF films. Then theoretical model formulated quantitatively interpret effect on permittivity performance provide guidelines for optimization of volume fraction. Moreover, simple cost-effective technique package composite film as large-area, lightweight transducer. Several confirmatory experiments proof-of-concept test performed based proposed transducer validate capability dynamic strain sensing. By comparing results from conventional gauges ceramic wafers, it verified that has proven responsivity precision in responding quasi-static strain, medium-frequency vibration, ultrasound. great potential developed wide range applications including structural health monitoring human motion detection been demonstrated.