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Cellulose nanocrystals with different length-to-diameter ratios extracted from various plants using novel system acetic acid/phosphotungstic acid/octanol-1

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Abstract

The novel system [acetic acid/phosphotungstic acid (H3PW12O40)/octanol] was proposed for catalytic solvolysis of cellulose and for obtaining cellulose nanocrystals (CNC). Several alternative experiments involving mixtures with different compositions were carried out; reaction time was also varied. CNC particles from cotton, linen, softwood and hardwood cellulose were prepared in the experiments performed for 40 min in the presence of 0.25 mol% of the heteropolyacid. CNC samples were characterized by transmission electron microscopy and atomic force microscopy, X-ray diffraction analysis, and thermogravimetric analysis. It was established that the resulting nanoparticles had high crystallinity and rod-like shape; their length varied from 160 to 400 nm (cotton CNC had the shortest length, and linen CNC had the longest length), and CNC thickness ranged from 6 to 10 nm. Thermal stability of CNC was lower than that of initial celluloses and decreasing in the following sequence: cotton > softwood > hardwood > linen cellulose.

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Acknowledgments

The research was financially supported by the Russian Science Foundation (project No. 16-13-10148). The research done using the equipment of Center for Collective Use “Khimiya” of Russian Academy of Sciences Ural Branch Komi Science Centre Institute of Chemistry.

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Correspondence to Elena V. Udoratina.

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Torlopov, M.A., Mikhaylov, V.I., Udoratina, E.V. et al. Cellulose nanocrystals with different length-to-diameter ratios extracted from various plants using novel system acetic acid/phosphotungstic acid/octanol-1. Cellulose 25, 1031–1046 (2018). https://doi.org/10.1007/s10570-017-1624-z

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  • DOI: https://doi.org/10.1007/s10570-017-1624-z

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