A Wrinkle‐Enhanced Porous Poly(lactic Acid) Electret‐based Nanogenerator for Self‐powered Wireless Temperature Measurement Systems

Abstract

Recently, electret‐based triboelectric nanogenerator (E‐TENG) showssignificant advantages for energy harvesting applications, including a largeelectric current and high output stability. Inthis investigation, porous biocompatible polylactide (PLA) film is prepared for E‐TENG applications. They found that thesurface potential of the porous PLA‐based bioelectret film is maintained at2.1 kV after 86 days of decay,. The measurement data from theE‐TENG‐based cantilever beam showed that the E‐TENG reached an open‐circuitvoltage (Voc) of 184 V and a short circuit current (Isc)of 22.4 µAat 13.8 Hz. Furthermore, the E‐TENG and the PVDF‐based piezoelectric nanogenerator (PENG) are combined to create a hybridNG for energy harvesting applications. The data indicate that the maximumoutput power of the hybrid NG reached 73.5 µWat 6 MΩ,which is 30.7% and 1.91‐fold higher than that of the PENG and the E‐TENG,respectively. The hybrid NG is used as a powersource to drive a wireless temperaturetransmission system, which can receive a temperature transmission signal from 20 m away. The advantages of biocompatibility,softness and ease of processing make the porous PLA film a great candidate forwearable devices applications.

Biodegradable, Bifunctional Electro-acoustic Transducers Based on Cellular Polylactic Acid Ferroelectrets for Sustainable Flexible Electronics

“…Currently, recycling and disposal of E-waste are considered a global problem, for the E-waste produced every year significantly exceeds the capacity for landfill space and results in environmental burdens/damage, simultaneously. Thus, there is an urgent need to develop environmentally sustainable ways for ferroelectret material fabrication and disposal. − In this way, it could offer new opportunities for constructing a high-performance flexible acoustic transducer together with higher safety and environmental adaptivity.…”