Black Bioinks from Superstructured Carbonized Lignin Particles

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2023-11-02
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Language
en
Pages
11
Series
Advanced Functional Materials, articlenumber 2304867
Abstract
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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| openaire: EC/H2020/788489/EU//BioELCell
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Citation
Dufau Mattos, B, Jäntti, N, Khakalo, S, Zhu, Y, Miettinen, A, Parkkonen, J, Khakalo, A, Rojas, O & Ago, M 2023, ' Black Bioinks from Superstructured Carbonized Lignin Particles ', Advanced Functional Materials, vol. 33, no. 45, 2304867 . https://doi.org/10.1002/adfm.202304867