Determination of Alpha-, Beta- and Gamma- Cellulose in Bagasse and Wheat Straw: Lignin Recovery, Characterization and Depolymerization

Singh, Sandip K.; Matsagar, Babasaheb M.; Dhepe, Paresh L.

doi:10.21203/rs.3.rs-193157/v1

Cited by 2 publications

(1 citation statement)

References 55 publications

(92 reference statements)

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“…According to the results listed in Table 2, bolaina blanca wood at different sections contained approximately 52 % cellulose. The low yield obtained from the pulping process in general results from the partial degradation of amorphous/soluble cellulose (beta and gamma cellulose) due to the parameters used, yielding a pulp with a high percentage of alpha-type cellulose, which is characterised by its insolubility in sodium hydroxide, stability and high crystallinity (Manzano 2021, Singh et al 2021.…”

Section: Obtaining and Bleaching Cellulosic Pulpmentioning

confidence: 99%

Assessment of cellulose nanofibers from bolaina blanca wood obtained at three shaft heights

Arango-Perez,

Gonzales-Mora,

Ponce-Alvarez

et al. 2023

Maderas-Cienc Tecnol

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This study evaluated cellulose nanofibers from bolaina blanca wood (Guazuma crinita) obtained at different heights of the longitudinal axis of the shaft of trees from a three-and-a-half-year-old plantation. The wood was subjected to pulping, bleaching and subsequent mechanical milling using a Changsha Samy XYQM-2L planetary ball mill to obtain cellulose nanofibers. The product was characterised using analytical techniques: scanning electron microscopy, X-ray diffraction, thermogravimetric analysis, Fourier transform infrared spectroscopy, ultraviolet–visible spectroscopy. Additionally, the degree of polymerisation was determined. The effect of longitudinal position on cellulose nanofibers characteristics was evaluated by comparing means using ANOVA and Kruskal–Wallis statistical tests. The yield of cellulose nanofibers production from the high, middle and basal sections was 32,1 %, 33,6 % and 31 %, respectively. The obtained cellulose nanofibers exhibited a significantly larger diameter for the high zone (84 nm) compared with the middle (75 nm) and basal (69 nm) zones; the length remained above the micrometre range. With respect to degree of polymerisation, a decrease was evidenced with respect to the increase in shaft height; the basal zone exhibited a degree of polymerisation of 300, a significantly higher value than the middle and high zones, which exhibited degree of polymerisation of 249 and 211, respectively. The product showed typical cellulose type I polymorphism and crystallinity indexes of 76 %, 93 % and 96 % for the high, middle and basal sections, respectively. Regarding the thermostability of cellulose nanofibers, the maximum degradation rate of cellulose nanofibers occurred between 335 °C and 341 °C, with cellulose nanofibers from the basal area being the most stable. The adsorption of the methylene blue dye on cellulose nanofibers was evaluated; an efficiency > 60 % was found.

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Section: Obtaining and Bleaching Cellulosic Pulpmentioning

confidence: 99%

Assessment of cellulose nanofibers from bolaina blanca wood obtained at three shaft heights

Arango-Perez,

Gonzales-Mora,

Ponce-Alvarez

et al. 2023

Maderas-Cienc Tecnol

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Reuse of Barley Straw for Handmade Paper Production

et al. 2022

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The main objective of this work is supporting the use of sustainable solutions for the management and reuse of agricultural waste from the cereal harvest, such as oats, barley, and triticale, making sheets of artisan paper, innovating the process with the use of different proportions of cellulose obtained from straw residues. The physical and mechanical properties of the obtained sheets showed that basis weight (66–96 g/m2), thickness (19–300 μm), burst strength (68.9–103.4 kPa), burst index (0.81–1.35 kPam2/g) and bulk (2.52–3.12 cm3/g), were adequate. Based on what can be observed in the SEM images, it is possible to infer that straw has the function of supporting the sheets using combinations of barley straw and recycled paper. The result of the IR analysis indicated that the sheet with an increase in hydroxyl groups was that obtained with barley straw. Therefore, the treatment was efficient. These results were corroborated by X-ray diffraction analysis, in which the percentage of crystallinity of the barley straw paper was 37.1%. Finally, the results obtained indicated that the crystallinity is better in the sheets containing large amounts of barley straw. The sheet with the highest percentage of crystallinity was that which was made using 100% of barley straw, showing a 37.1 percentage of crystallinity, followed by the sheet made of 100% recycled paper, having a value of 34.4%.

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Determination of Alpha-, Beta- and Gamma- Cellulose in Bagasse and Wheat Straw: Lignin Recovery, Characterization and Depolymerization

Cited by 2 publications

References 55 publications

Assessment of cellulose nanofibers from bolaina blanca wood obtained at three shaft heights

Assessment of cellulose nanofibers from bolaina blanca wood obtained at three shaft heights

Reuse of Barley Straw for Handmade Paper Production

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