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A facile method to concentrate cellulose nanofibril slurries
- Sheng, Jie, Yang, Rendang
- Cellulose 2019 v.26 no.2 pp. 679-682
- bamboos, cellulose, freezing, hardwood, melting, nanofibers, pulp, slurries
- A highly efficient approach to concentrate nanocellulose suspensions is urgently required for the application of nanocellulose at a large scale. In this paper, a facile method, freeze concentration, was used to concentrate a nanocellulose slurry. This method only includes two processes, first freezing of the slurry followed by melting. Most of the water in the slurries could be easily removed, and the concentrated nanofibrils were easily redispersed. Approximately 96.1% and 94.5% of the water of bamboo pulp and hardwood pulp nanofibril slurries were removed; furthermore, the solid content increased from approximately 0.5% to 12.8% and 9.1%, respectively. These results indicate that freeze concentration is well-suited for large-scale nanocellulose concentration to facilitate transport.