Abstract
A facile protocol to prepare CMC/CNC suspensions with high yield of CNCs is presented, where CMC was used in combination with mechanical shearing to promote delamination of the cellulose fiber wall. The maximum yield of CNCs in the CMC/CNC suspension was 41.6%. Compared with a purely mechanical method, the yield of CNCs has been increased by 103%. The diameter and length of the obtained CNCs were 20–45 and 200–250 nm separately. The thermal stability of CNCs was higher than acid derived CNCs due to the unmodified surface groups. Thin films of neat CMC and CMC/CNC composites were prepared by solution casting. The SEM results showed good dispersion of CNCs in the matrix. The tensile strength of the film was increased compared with neat CMC film.
Graphical abstract
A facile protocol to prepare CMC/CNC suspension with high yield of CNCs is presented, where CMC is used in combination with mechanical shearing to promote delamination of the cellulose fiber wall.
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This work was supported by the National Natural Science Foundation of China (No. 51733009), the Natural Science Foundation of Hebei Province (No. E2018210125) and Hebei Key Discipline Construction Project.
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Lin, X., Guo, X., Xu, C. et al. Carboxymethyl cellulose assisted mechanical preparation of cellulose nanocrystals with high yield. Cellulose 26, 5227–5236 (2019). https://doi.org/10.1007/s10570-019-02452-7
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DOI: https://doi.org/10.1007/s10570-019-02452-7