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Molecules 2017, 22(12), 2177; https://doi.org/10.3390/molecules22122177

Cellulose Nanofibers Prepared via Pretreatment Based on Oxone® Oxidation

Nanotechnology and Functional Materials, Department of Engineering Sciences, Uppsala University, Box 534, 75121 Uppsala, Sweden
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Received: 27 October 2017 / Revised: 4 December 2017 / Accepted: 5 December 2017 / Published: 8 December 2017
(This article belongs to the Special Issue Cellulose Chemical Modifications—Towards Sustainable Materials)
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Abstract

Softwood sulfite bleached cellulose pulp was oxidized with Oxone® and cellulose nanofibers (CNF) were produced after mechanical treatment with a high-shear homogenizer. UV-vis transmittance of dispersions of oxidized cellulose with different degrees of mechanical treatment was recorded. Scanning electron microscopy (SEM) micrographs and atomic force microscopy (AFM) images of samples prepared from the translucent dispersions showed individualized cellulose nanofibers with a width of about 10 nm and lengths of a few hundred nm. All results demonstrated that more translucent CNF dispersions could be obtained after the pretreatment of cellulose pulp by Oxone® oxidation compared with the samples produced without pretreatment. The intrinsic viscosity of the cellulose decreased after oxidation and was further reduced after mechanical treatment. Almost translucent cellulose films were prepared from the dispersions of individualized cellulose nanofibers. The procedure described herein constitutes a green, novel, and efficient route to access CNF. View Full-Text
Keywords: higher CNF production efficiency; Oxone® oxidation; pretreatment; homogenization higher CNF production efficiency; Oxone® oxidation; pretreatment; homogenization
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Ruan, C.-Q.; Gustafsson, S.; Strømme, M.; Mihranyan, A.; Lindh, J. Cellulose Nanofibers Prepared via Pretreatment Based on Oxone® Oxidation. Molecules 2017, 22, 2177.

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