Fractionation of Wood with Binary Solvent 1-Butyl-3-methylimidazolium Acetate + Dimethyl Sulfoxide

Ladesov, A. V.; Belesov, A. V.; Кузнецова, М В; Pochtovalova, A. S.; Малков, А. В.; Shestakov, S. L.; Kosyakov, D. S.

doi:10.1134/s1070427218040201

Cited by 12 publications

(7 citation statements)

References 19 publications

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“…13 C Solid-state CPMAS NMR analysis 2010; Balakshin and Capanema 2015;Ladesov et al 2018) Again, this supports our previous data (crystallinity index, ATR-IR and TGA) and the notion that above 170°C significant leaching of amorphous cellulose takes place coupled with lignin either moving to surface or decomposition of cellulose to afford pseudolignins, which overall results in a MFLC material.…”

Section: Thermal Stabilitysupporting

confidence: 80%

From unavoidable food waste to advanced biomaterials: microfibrilated lignocellulose production by microwave-assisted hydrothermal treatment of cassava peel and almond hull

et al. 2021

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Lignocellulose based nanomaterials are emerging green biosolids commonly obtained from wood pulp. Alternative feedstocks, such as as unavoidable food waste, are interesting resources for nano/microfibers. This research reports the production and characterization of microfibrillated lignocellulose (MFLC) from cassava peel (CP) and almond hull (AH) via acid-free microwave-assisted hydrothermal treatment (MHT) at different temperatures (120–220 °C). During processing, the structural changes were tracked by ATR-IR, TGA, XRD, 13C CPMAS NMR, zeta potential, HPLC, elemental analysis (CHN; carbon, hydrogen and nitrogen), TEM and SEM analyses. The microwave processing temperature and nature of feedstock exerted a significant influence on the yields and properties of the MFLCs produced. The MFLC yields from CP and AH shifted by 15–49% and 31–73%, respectively. Increasing the MHT temperature substantially affected the crystallinity index (13–66% for CP and 36–62% for AH) and thermal stability (300–374 °C for CP and 300–364 °C for AH) of the MFLCs produced. This suggested that the MFLC from CP is more fragile and brittle than that produced from AH. These phenomena influenced the gelation capabilities of the fibers. AH MFLC pretreated with ethanol at low temperature gave better film-forming capabilities, while untreated and heptane pretreated materials formed stable hydrogels at solid concentration (2% w/v). At high processing temperatures, the microfibrils were separated into elementary fibers, regardless of pretreatment or feedstock type. Given these data, this work demonstrates that the acid-free MHT processing of CP and AH is a facile method for producing MFLC with potential applications, including adsorption, packaging and the production of nanocomposites and personal care rheology modifiers. Graphic abstract

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Section: Thermal Stabilitysupporting

confidence: 80%

From unavoidable food waste to advanced biomaterials: microfibrilated lignocellulose production by microwave-assisted hydrothermal treatment of cassava peel and almond hull

et al. 2021

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“…Similarly, the formation of carbonyl and quinone structures in addition to demethoxylation of lignin was observed under the treatment with 1-butylimidazolium hydrogen sulfate [16] and bmim chloride [17]. The interactions of alkylimidazolium cations with lignin can also lead to the formation of covalent bonds, for example, due to the base catalyzed nucleophilic addition of IL cation to carbonyl groups [18,19].…”

Section: Introductionmentioning

confidence: 92%

Characterization of Ionic Liquid Lignins Isolated from Spruce Wood with 1-Butyl-3-methylimidazolium Acetate and Methyl Sulfate and Their Binary Mixtures with DMSO

et al. 2020

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Ionic liquids (ILs) based on 1-butyl-3-methylimidazolium (bmim) cation have proved to be promising solvents for the fractionation of plant biomass with the production of cellulose and lignin. This study deals with the characterization of lignins isolated from coniferous (spruce) wood using [bmim]OAc and [bmim]MeSO4 ionic liquids and their binary mixtures with DMSO (80:20). Molecular weight distributions, functional composition, and structural features of IL lignins were studied by size-exclusion chromatography, NMR spectroscopy (1D and 2D) and atmospheric pressure photoionization high-resolution mass spectrometry. It was shown that the interaction of ILs with lignin leads to significant chemical changes in the biopolymer; a decrease in the degree of polymerization and in the content of free phenolic hydroxyl groups due to alkylation, the disappearance (in the case of [bmim]OAc) of carbonyl groups and a significant destruction of β-O-4 bonds. The chemical reactions between lignin and 1-butyl-3-methylidazolium cation with covalent binding of ionic liquids or products of their decomposition is evidenced by the presence of a large number of nitrogen-containing oligomers in IL lignins.

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“…In this work we selected BmimAc and BmimCl for biopolymers dissolution, because of their capacity to dissolve wood components. 53,54 Moreover, BmimAc is signicantly more basic than BmimCl because the acetate anion is more basic than chloride. 55 Then, the acetate anion can efficiently break hydrogen bonds and therefore allows better wood and lignin dissolution compared to chloride.…”

Section: Chemical Composition Of Biomaterialsmentioning

confidence: 99%

Lignocellulosic residues from bioethanol production: a novel source of biopolymers for laccase immobilization

et al. 2023

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Fractionation of Wood with Binary Solvent 1-Butyl-3-methylimidazolium Acetate + Dimethyl Sulfoxide

Cited by 12 publications

References 19 publications

From unavoidable food waste to advanced biomaterials: microfibrilated lignocellulose production by microwave-assisted hydrothermal treatment of cassava peel and almond hull

From unavoidable food waste to advanced biomaterials: microfibrilated lignocellulose production by microwave-assisted hydrothermal treatment of cassava peel and almond hull

Characterization of Ionic Liquid Lignins Isolated from Spruce Wood with 1-Butyl-3-methylimidazolium Acetate and Methyl Sulfate and Their Binary Mixtures with DMSO

Lignocellulosic residues from bioethanol production: a novel source of biopolymers for laccase immobilization

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