Influence of hemicellulose content and cellulose crystal change on cellulose nanofibers properties.

Autor: Dias MC; Department of Forest Science, Federal University of Lavras, C.P. 3037, 37200-900 Lavras, MG, Brazil; Université Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LGP2, 38000, Grenoble, France. Electronic address: matheus.cordasso@gmail.com., Zidanes UL; Department of Forest Science, Federal University of Lavras, C.P. 3037, 37200-900 Lavras, MG, Brazil., Martins CCN; Department of Forest Science, Federal University of Lavras, C.P. 3037, 37200-900 Lavras, MG, Brazil., de Oliveira ALM; Department of Food Science, Federal University of Lavras, C.P. 3037, 37200-900 Lavras, MG, Brazil., Damásio RAP; Klabin, Technology Center, Industrial R&D+I, Fazenda Monte Alegre, St. Harmonia, 84275-000 Telêmaco Borba, PR, Brazil., de Resende JV; Department of Food Science, Federal University of Lavras, C.P. 3037, 37200-900 Lavras, MG, Brazil., Vilas Boas EVB; Department of Food Science, Federal University of Lavras, C.P. 3037, 37200-900 Lavras, MG, Brazil., Belgacem MN; Université Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), LGP2, 38000, Grenoble, France., Tonoli GHD; Department of Forest Science, Federal University of Lavras, C.P. 3037, 37200-900 Lavras, MG, Brazil., Ferreira SR; Department of Engineering, Federal University of Lavras, C.P. 3037, 37200-900 Lavras, MG, Brazil.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2022 Jul 31; Vol. 213, pp. 780-790. Date of Electronic Publication: 2022 Jun 09.
DOI: 10.1016/j.ijbiomac.2022.06.012
Abstrakt: This study aimed to evaluate the properties of cellulose nanofibers (CNFs) with different hemicellulose contents and cellulose II polymorphs. A link was found between these polysaccharides and the properties of CNFs. A decrease in crystallinity (from 69 to 63%) and changes in the crystalline structure of cellulose subjected to an alkaline environment were observed, promoting the partial conversion of cellulose I to cellulose II (from 2 to 42%) and preventing CNFs production at NaOH concentrations higher than 5%. Most treatments showed pseudoplastic fluid behavior, except for the 10% NaOH treatment over 2 h, which showed Newtonian fluid behavior. The quality index of the reference CNFs (TEMPO-oxidized) was the highest (80 ± 3), followed by that of the 5% NaOH-treated (68 ± 3 and 22% energy savings compared to the untreated sample), and the untreated (63 ± 3) samples; and the 10% NaOH treatments had quality indices of 51 ± 3 and 32 ± 1, respectively.
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Databáze: MEDLINE
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