Black Bioinks from Superstructured Carbonized Lignin Particles
Mattos, B. D., Jäntti, N., Khakalo, S., Zhu, Y., Miettinen, A., Parkkonen, J., Khakalo, A., Rojas, O. J., & Ago, M. (2023). Black Bioinks from Superstructured Carbonized Lignin Particles. Advanced Functional Materials, Early View. https://doi.org/10.1002/adfm.202304867
Published inAdvanced Functional Materials
Zhu, Ya |
DisciplineSoveltava fysiikkaResurssiviisausyhteisöNanoscience CenterFysiikkaApplied PhysicsSchool of Resource WisdomNanoscience CenterPhysics
© 2023 the Authors
A renewable source of carbon black is introduced by the processing of lignin from agro-forestry residues. Lignin side streams are converted into spherical particles by direct aerosolization followed by carbonization. The obtained submicron black carbon is combined with cellulose nanofibers, which act as a binder and rheology modifier, resulting in a new type of colloidal bioink. The bioinks are tested in handwriting and direct ink writing. After consolidation, the black bioinks display total light reflectance (%R) at least three times lower than commercial black inks (reduction from 12 to 4%R). A loading of up to 20% of nanofibers positively affects the cohesion of the dried bioink (1 to 16 MPa), with no significant reduction in light reflectance. This is a result of the superstructuring of the ink components, which disrupts particle packing, intensifies colloidal interactions, introduces light absorption, and non-reflective multiple scattering.
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Additional information about fundingThe authors acknowledge funding support from the European Research Council (ERC) under the European Union’s Horizon 2020 research and in-novation program (grant agreement no. 788489, “BioElCell”), the Canada Excellence Research Chair Program (CERC-2018-00006). This work was a part of the Academy of Finland’s Flagship Programme under Project No. 318890 and 318891 (Competence Center for Materials Bioeconomy, FinnCERES. ...
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