In the present work, the most recent progress in our laboratories will be presented, regarding the synthesis, characterization and applications of conductive inks made with carbon nanostructures (carbon nanotubes and graphene derivatives). Our main approach is to develop aqueous systems, capable of acting as precursors of conductive thin films, under a sustainability scope, by employing 'green' nanomaterials as dispersing agents coming from renewable sources. The main focuses are cellulose or chitin nanocrystals, and silk fibroin, which are able to generate stable aqueous bioinks in combination with carbon nanomaterials and several processing techniques (namely, dispersion, centrifugation or autoclave treatments). The processing, characterization and use of these inks will be discussed, as well as some application aspects in the energy and biomedicine fields.

Abstract of the talk delivered at the HeteroNanoCarb-2019 Conference, Advances and applications in carbon related nanomaterials: From pure to doped structures including heteroatom layers, 2019, December 09th -- 13th, Centro de Ciencias de Benasque Pedro Pascual in Benasque (Aragon, Spain).