纤维素
材料科学
纳米晶
纳米技术
背景(考古学)
化学工程
沉积(地质)
卷到卷处理
光子学
制作
光电子学
病理
古生物学
工程类
生物
医学
替代医学
沉积物
作者
Benjamin E. Droguet,Hsin‐Ling Liang,Bruno Frka‐Petesic,Richard Parker,Michaël De Volder,Jeremy J. Baumberg,Silvia Vignolini
出处
期刊:Nature Materials
[Springer Nature]
日期:2021-11-11
卷期号:21 (3): 352-358
被引量:164
标识
DOI:10.1038/s41563-021-01135-8
摘要
Cellulose nanocrystals are renewable plant-based colloidal particles capable of forming photonic films by solvent-evaporation-driven self-assembly. So far, the cellulose nanocrystal self-assembly process has been studied only at a small scale, neglecting the limitations and challenges posed by the continuous deposition processes that are required to exploit this sustainable material in an industrial context. Here, we addressed these limitations by using roll-to-roll deposition to produce large-area photonic films, which required optimization of the formulation of the cellulose nanocrystal suspension and the deposition and drying conditions. Furthermore, we showed 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 (for example, non-biodegradable microplastic glitters) or based on carcinogenic, unsustainable or unethically sourced compounds (for example, titania or mica). The large-scale fabrication of cellulose nanocrystal photonic films in a roll-to-roll device is achieved by careful optimization of the cellulose nanocrystal formulation and its controlled deposition and drying on a substrate. Once dry, these photonic films can be peeled and milled into effect pigments, highlighting the potential of cellulose nanocrystals as a sustainable material for industrial photonic applications.
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