期刊
ULTRASONICS SONOCHEMISTRY
卷 78, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.ultsonch.2021.105747
关键词
Ultrasonication; Distribution; Dispersion; Suspensions; Cellulose nanocrystals
资金
- National Science and Engineering Research Council of Canada (NSERC)
- Prima Quebec
- FP Innovations
- Simulation-based Engineering Science (Genie Par la Simulation) group
This study investigates the ultrasonication process of CNCs using rheology, comparing the dispersion states of suspensions with different concentrations. The findings provide insights on how to control the dispersion of CNCs effectively.
Cellulose nanocrystals (CNCs) are promising biomaterials, but their tendency to agglomerate when dried limits their use in several applications. Ultrasonication is commonly used to disperse CNCs in water, bringing enough energy to the suspension to break agglomerates. While the optimized parameters for sonication are now well defined for small volumes of low concentration CNC suspensions, a deeper understanding of the influence of the dispersing process is needed to work with larger volumes, at higher concentrations. Herein, rheology is used to define the distribution and dispersion states upon ultrasonication of a 3.2 wt% CNC suspension. After considering the importance of the measurement sampling volume, the behavior of a more concentrated suspension (6.4 wt%) is examined and compared with a never-dried suspension of the same concentration to validate the dispersion state.
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