Individualization of Nano-Sized Plant Cellulose Fibrils by Direct Surface Carboxylation Using TEMPO Catalyst under Neutral Conditions
Centre National de la Recherche Scientifique · Centre de Recherches sur les Macromolécules Végétales · +3 more institutions
Abstract
A new catalytic oxidation using 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) and NaClO is applied to hardwood cellulose in water at 60 °C and pH 6.8 with NaClO(2) used as a primary oxidant. The oxidized celluloses with carboxylate content of approximately 0.8 mmol/g were convertible to highly crystalline and individual fibrils 5 nm in width and at least 2 μm in length by disintegration in water. The oxidized celluloses had no aldehyde groups, and high degrees of polymerization of more than 900. Solid-state (13)C NMR and X-ray analyses revealed that the C6 carboxylate groups formed are selectively present on the crystalline fibril surfaces at high densities. Films prepared from the dispersions were transparent…
Citation impact
- FWCI
- 16.23
- Percentile
- 100%
- References
- 30
Authors
7- TSTsuguyuki SaitoCorresponding
Centre National de la Recherche Scientifique, Centre de Recherches sur les Macromolécules Végétales, Université Joseph Fourier, Université Grenoble Alpes, The University of Tokyo
- MHMasayuki Hirota
Université Grenoble Alpes, Centre de Recherches sur les Macromolécules Végétales, The University of Tokyo, Université Joseph Fourier, Centre National de la Recherche Scientifique
- NTNaoyuki Tamura
Centre National de la Recherche Scientifique, Université Grenoble Alpes, Centre de Recherches sur les Macromolécules Végétales, Université Joseph Fourier, The University of Tokyo
- SKSatoshi Kimura
Université Joseph Fourier, Centre de Recherches sur les Macromolécules Végétales, Centre National de la Recherche Scientifique, The University of Tokyo, Université Grenoble Alpes
- HFHayaka Fukuzumi
Université Grenoble Alpes, The University of Tokyo, Centre de Recherches sur les Macromolécules Végétales, Université Joseph Fourier, Centre National de la Recherche Scientifique
Topics & keywords
- Cellulose
- Carboxylate
- Catalysis
- Carboxylation
- Ultimate tensile strength
- Polymerization
- Chemical engineering
- Chemistry
- Clean water and sanitation