Black Bioinks from Superstructured Carbonized Lignin Particles

A renewable source of carbon black is introduced by the processing lignin from agro-forestry residues. Lignin side streams are converted into spherical particles direct aerosolization followed carbonization. The obtained submicron combined with cellulose nanofibers, which act as a binder and rheology modifier, resulting in new type colloidal bioink. bioinks tested handwriting ink writing. After consolidation, display total light reflectance (%R) at least three times lower than commercial inks (reduction 12 to 4%R). loading up 20% nanofibers positively affects cohesion dried bioink (1 16 MPa), no significant reduction reflectance. This result superstructuring components, disrupts particle packing, intensifies interactions, introduces absorption, non-reflective multiple scattering.