Preparation of electrically conductive PLA/rGO nanocomposite filaments

Aiming to produce electrically conductive polylactic acid (PLA), a reduced graphene oxide (rGO) with low oxygen content was prepared to produce PLA/rGO nanocomposites by melt compounding. The electrical conductivity of PLA/rGO composites improved significantly with the incorporation of rGO at a moderate filler loading, thanks to the large lateral size, low thickness, and low oxygen content of the rGO prepared. Filament for fused-deposition modeling has been produced based on the composite produced at 2% in weight with the purpose of producing devices for electronic applications. An all-polymer humidity sensor device has been prepared using the PLA/rGO filament produced demonstrating the ability to produce all-polymer devices.