Fabrication of Cellulose-Graphite Foam via Ion Cross-linking and Ambient-Drying.
Nano Lett
; 22(10): 3931-3938, 2022 05 25.
Article
em En
| MEDLINE
| ID: mdl-35503740
ABSTRACT
Conventional plastic foams are usually produced by fossil-fuel-derived polymers, which are difficult to degrade in nature. As an alternative, cellulose is a promising biodegradable polymer that can be used to fabricate greener foams, yet such a process typically relies on methods (e.g., freeze-drying and supercritical-drying) that are hardly scalable and time-consuming. Here, we develop a fast and scalable approach to prepare cellulose-graphite foams via rapidly cross-linking the cellulose fibrils in metal ions-containing solution followed by ambient drying. The prepared foams exhibit low density, high compressive strength, and excellent water stability. Moreover, the cross-linking of the cellulose fibrils can be triggered by various metal ions, indicating good universality. We further use density functional theory to reveal the cross-linking effect of different ions, which shows good agreement with our experimental observation. Our approach presents a sustainable route toward low-cost, environmentally friendly, and scalable foam production for a range of applications.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Celulose
/
Grafite
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article