Structural and Morphological Analysis of Cellulose Pulp Produced from the Fractionation of Eucalyptus obliqua Sawdust Using γ-Valerolactone.
| Autor: | Trevorah RM; School of Engineering, RMIT University, P.O. Box 2476, Melbourne 3001, Australia., Huynh T; School of Science, RMIT University, P.O. Box 71, Bundoora 3083, Australia., Brkljača R; School of Science, RMIT University, P.O. Box 71, Bundoora 3083, Australia., Othman MZ; School of Engineering, RMIT University, P.O. Box 2476, Melbourne 3001, Australia. |
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| Jazyk: | angličtina |
| Zdroj: | ACS omega [ACS Omega] 2021 Feb 03; Vol. 6 (6), pp. 4126-4136. Date of Electronic Publication: 2021 Feb 03 (Print Publication: 2021). |
| DOI: | 10.1021/acsomega.0c03616 |
| Abstrakt: | Organic solvents offer promising methods for the fractionation of Eucalyptus obliqua lignocellulosic biomass. This study investigated the impact of γ-valerolactone (GVL) fractionation on the morphology of cellulose and its internal structure using scanning electron microscopy (SEM), nuclear magnetic resonance (NMR) and Fourier-transform infrared (FT-IR) spectroscopy. The solubilized lignin precipitated on the macrofibril surface as lignin spheres. GVL fractionation significantly increased the crystallinity of the recovered pulps from 0.29 for the sawdust to an average of 0.53 and a maximum of 0.66. The main states of cellulose that were susceptible to hydrolysis during the fractionation were amorphous and surface cellulose, both of which were reduced significantly, while paracrystalline and pure crystalline fractions in the pulp increased. It was concluded that GVL fractionation can produce a crystalline cellulose pulp of high quality suitable for further processing. Competing Interests: The authors declare no competing financial interest. (© 2021 American Chemical Society.) |
| Databáze: | MEDLINE |
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