Biodegradable and Bioabsorbable Polylactic Acid Ferroelectrets with Prominent Piezoelectric Activity

Ferroelectrets have promoted a variety of exciting flexible sensors, actuators, and microenergy harvesters. However, most ferroelectrets been fabricated from non-degradable petro-based resins, thus the recycling these materials constitutes big challenge. This article reports biodegradable bioabsorbable ferroelectret films made polylactic acid (PLA) resins for highly sensitive transducer applications, which can operate either in piezoelectric 33 or 31/32 mode. By modification microstructure polarization, pronounced longitudinal transverse activities are realized single material. For samples with thickness 400 µm bulk density 350 kg m−3, Young's moduli plane direction ranging 0.1 to 10 MPa, respectively. After polarization direction, quasi-static d33, g33, d31 (d32), g31 (g32) coefficients PLA films, up 500 pC N−1, 40 Vm −44 −3.6 achieved, The comparable polymer ferroelectrets, while activity is superior, may be attributed reduction direction. preparation procedure compatible large-scale production lines greatly promote their applications green electronics.