Method for manufacturing carboxymethylated cellulose nanofiber
US11732055B2 · kind B2 · utility
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5References
15Claims
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Key dates
| Filing date | Dec 5, 2018 |
| Grant date | Aug 22, 2023 |
| Priority date | — |
| Expiry date | Dec 5, 2038 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M2101/08
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Provided is a novel manufacturing method whereby a carboxymethylated cellulose nanofiber dispersion having high tarnasparency can be obtained economically. In carboxymethylation of cellulose in the present invention, mercerization is performed in water as the main solvent, after which carboxymethylation is performed in a solvent mixture of water and an organic solvent, By defibrating the resultant carboxymethylated cellulose, a carboxymethylated cellulose nanofiber dispersion having high transparency can be obtained economically.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.