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A technique for the ultrasonic dispersion of larger quantities of cellulose nanocrystals with in-line validation

Mélanie Girard, François Bertrand, Jason Robert Tavares and Marie-Claude Heuzey

Article (2022)

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Abstract

Cellulose nanocrystals (CNCs) can be used in a wide range of applications due to their unique properties. However, the dispersion required to achieve these properties in various media may be quite challenging, especially at larger scales. Starting from an optimized protocol to prepare small volumes (60 mL) of aqueous suspensions, a semicontinuous setup is developed in this work to disperse larger quantities (200 mL). Using this technique, a higher efficiency is achieved, consuming only 35 % of the energy needed with a comparable batch method. To follow the dispersion state, an in-line process rheometry technique is adapted and validated through finite element simulation. While this allows for fast and easy validation, a deeper analysis may also be carried out to extract additional information such as the process viscosity. This setup is further exploited for the CNC surface modification using polyethylenimine. Although it has been designed for CNCs, it may be adapted for other nanoparticle dispersion.

Uncontrolled Keywords

Ultrasonication, cellulose nanocrystals, suspension, dispersion, in-line measurement, semi-continuous setup

Subjects: 1800 Chemical engineering > 1800 Chemical engineering
2000 Materials science and technology > 2002 Materials processing/fabrication
Department: Department of Chemical Engineering
Research Center: CREPEC - Center for Applied Research on Polymers and Composites
URPEI - Research Center in Industrial Flow Processes
Funders: National Science and Engineering Research Council of Canada (NSERC) (CRD and CREATE programs), Prima Québec, FPInnovations
Grant number: RDCPJ 490786-15
PolyPublie URL: https://publications.polymtl.ca/51712/
Journal Title: Chemical Engineering Journal (vol. 446, no. Pt. 4)
Publisher: Elsevier
DOI: 10.1016/j.cej.2022.137434
Official URL: https://doi.org/10.1016/j.cej.2022.137434
Date Deposited: 18 Apr 2023 14:58
Last Modified: 09 Apr 2024 18:48
Cite in APA 7: Girard, M., Bertrand, F., Tavares, J. R., & Heuzey, M.-C. (2022). A technique for the ultrasonic dispersion of larger quantities of cellulose nanocrystals with in-line validation. Chemical Engineering Journal, 446(Pt. 4), 137434 (9 pages). https://doi.org/10.1016/j.cej.2022.137434

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