Development of PLA-based triboelectric nanogenerators for harvesting the mechanical energy of the environment

Abstract

This thesis presents an in-depth investigation into the development of triboelectric generators, which are devices that convert mechanical energy from the environment into electrical energy, using Polylactic Acid (PLA) composites doped with Zinc Oxide (ZnO) and Silicon Carbide (SiC). PLA is a sustainable, biodegradable thermoplastic polyester made from renewable resources like corn starch or sugarcane, and it is extensively utilized in Fused Deposition Modeling (FDM) 3D printing for its minimal environmental footprint and advantageous mechanical characteristics. The strategic addition of nanofillers such as ZnO and SiC to PLA is studied for their ability to fine-tune these inherent properties and significantly boost the triboelectric output of PLA-based nanogenerators. The choice of SiC as a dopant is based on its remarkable hardness and ability to reinforce the mechanical attributes of the composite, while ZnO is incorporated for its multifunctional benefits, including UV shielding, antimicrobial effects, and enhanced thermal conductivity. This study provides a comprehensive analysis of the mechanical and electrical properties of PLA composites doped with SiC and ZnO, offering insights into the potential of these materials in enhancing the efficiency of triboelectric generators for environmental energy harvesting applications.