Large-scale fabrication of structurally coloured cellulose nanocrystal films and effect pigments
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Droguet, B., Liang, H., Parker, R., Frka-Petesic, B., De Volder, M., Baumberg, J., & Vignolini, S. Large-scale fabrication of structurally coloured cellulose nanocrystal films and effect pigments. Nature Materials https://doi.org/10.17863/CAM.74735
Cellulose nanocrystals (CNCs) are renewable plant-based colloidal particles capable of forming photonic films by solvent evaporation driven self-assembly. So far, the CNC self-assembly process has only been studied at a small scale, neglecting the limitations and challenges posed by continuous deposition processes that are required to exploit this sustainable material in an industrial context. Here, we address these limitations by using roll-to-roll (R2R) deposition to produce large area photonic films, which required optimisation of the formulation of the CNC suspension, the deposition and drying conditions. Furthermore, we show how metre-long structurally coloured films can be processed into effect pigments and glitters that are dispersible, even in water based formulations. These promising effect pigments are an industrially relevant cellulose-based alternative to current products that are either micro-polluting (e.g., non-biodegradable microplastic glitters) or based on carcinogenic, unsustainable or unethically sourced compounds (e.g., titania, mica).
Is supplemented by: https://doi.org/10.17863/CAM.64239
This work was supported by EPSRC [EP/R511675/1, EP/N016920/1], by the European Union’s Horizon 2020 Marie Skłodowska-Curie research and innovation programme [H2020-MSCA-ITN-2016 722842] and by the European Research Council [ERC-2014-STG H2020 639088; ERC-2017-POC 790518].
European Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (722842)
ECH2020 EUROPEAN RESEARCH COUNCIL (ERC) (639088)
European Commission Horizon 2020 (H2020) ERC (790518)
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This record's DOI: https://doi.org/10.17863/CAM.74735
This record's URL: https://www.repository.cam.ac.uk/handle/1810/327287
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