Effects of Deep Eutectic Solvents on cellulosic fibres and paper properties: Green “chemical” refining

Mnasri, Ahlem; Dhaouadi, Hatem; Khiari, Ramzi; Halila, Sami; Mauret, Évelyne

doi:10.1016/j.carbpol.2022.119606

Cited by 25 publications

(9 citation statements)

References 51 publications

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“…Aldehyde groups could interact with different functional groups on the enzyme/protein surface through covalent and/or exceptionally strong noncovalent bonds, which sometimes remain even after complete protein breakdown. 33,34 This finding was demonstrated in the FTIR spectrum of the pretreated substrates (Fig. 3b).…”

Section: Characterization and Utilization Of Cellulosesupporting

confidence: 63%

Functional deep eutectic solvent for lignocellulose valorization via lignin stabilization and cellulose functionalization

Zhang,

Lv,

et al. 2024

Green Chem.

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Section: Characterization and Utilization Of Cellulosesupporting

confidence: 63%

Functional deep eutectic solvent for lignocellulose valorization via lignin stabilization and cellulose functionalization

Zhang,

Lv,

et al. 2024

Green Chem.

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“…In the latest study, some DESs was used to dissolve cellulose, which undergoes a type I to type II transformation in the dissolution process (Zhong et al 2022). Moreover, it is reported that only internal or external brillation occurred with DES treatment without a great extent of modi cation in terms of chemical composition and crystallinity (Mnasri et al 2022). In this work, the CNF obtained by all DES systems maintained the natural cellulose type I structure (shown in Fig.…”

supporting

confidence: 53%

Insights into the critical role of anions in nanofibrillation of cellulose in deep eutectic solvents

Zhang,

Dai,

Zhang

et al. 2023

Preprint

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Complex interactions between cellulose molecules and small molecules can lead to dramatic changes in the structure of the hydrogen bond network in cellulose in green sustainable deep eutectic solvents (DESs). However, the molecular and ionic evolution mechanism of DESs on cellulose nanofibrillation is still unclear. In this study, the mechanism and the critical role of action of ions in DESs on cellulose nanofibrillation were investigated. The results showed that cellulose nanofiber (CNF) with a diameter of less than 200 nm can be prepared directly by DES containing lactic acid (LA) and chloride (LA/ammonium chloride (NH4Cl) and LA/dodecyltrimethylammonium chloride (DTAC) with a diameter of less than 200 nm, and LA/zinc chloride (ZnCl2) with a diameter of less than 100 nm). The Kamlet-Abboud-Taft parameters (KAT value) showed that DESs containing LA have higher hydrogen bond acidity (α) than other systems (such as ethylene glycol and urea) without LA, which can provide more active protons to improve the proton mobility in the cellulose nanofibrillation. And DESs composed of LA and Cl− have high hydrogen bond alkalinity (β), which can lead to great changes in the original hydrogen bond network of cellulose and form a new hydrogen bond structure, thus making the deconstruction of cellulose easy. Thus, LA can be esterified with hydroxyl groups of cellulose under high-temperature moistening conditions, and the CNF prepared by DES system containing LA and Cl− had a highest degree of substitution (DS) (up to 0.73 in LA/ZnCl2 system) after high-temperature moistening.

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“…This was interpreted as resulting from two factors: the first one is the small size of the ethylene glycol molecule in the DESs, which allows it to diffuse in the cellulose, and consequently, promote the formation of a disordered layer at the surface of microfibrils; the second one is the contribution of ultrasound, which can degrade the surface layer of the cellulose microfibrils and thus participate to its disorder (Batishcheva et al., 2022). The effects of three DESs with different pH (acid, neutral, and alkaline) on cellulosic fiber structure and produced papers were studied (Mnasri et al., 2022). Acidic DESs could be used as a solvent for the esterification of cellulose.…”

Section: Preparations Of Polysaccharide‐based Films Aided With Ils/de...mentioning

confidence: 99%

“…The degree of polymerization, chemical composition, and crystallinity of cellulose did not greatly change during DESs treatment, although internal and external fibrillation occurred. Compared to traditional enzymatic hydrolysis, DESs treatment significantly enhances the mechanical properties of resulting cellulose papers (Mnasri et al., 2022).…”

Section: Preparations Of Polysaccharide‐based Films Aided With Ils/de...mentioning

confidence: 99%

Advances in green solvents for production of polysaccharide‐based packaging films: Insights of ionic liquids and deep eutectic solvents

Liu

et al. 2022

Comp Rev Food Sci Food Safe

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The problems with plastic materials and the good film-forming properties of polysaccharides motivated research in the development of polysaccharide-based films. In the last 5 years, there has been an explosion of publications on using green solvents, including ionic liquids (ILs), and deep eutectic solvents (DESs) as candidates to substitute the conventional solvents/plasticizers for preparations of desired polysaccharide-based films. This review summarizes related properties and recovery of ILs and DESs, a series of green preparation strategies (including pretreatment solvents/reaction media, ILs/DESs as components, extraction solvents of bioactive compounds added into films), and inherent properties of polysaccharide-based films with/without ILs and DESs. Major reported advantages of these new solvents are high dissolving capacity of certain ILs/DESs for polysaccharides (i.e., up to 30 wt% for cellulose) and better plasticizing ability than traditional plasticizers. In addition, they frequently display intrinsic antioxidant and antibacterial activities that facilitate ILs/DESs applications in the processing of polysaccharide-based films (especially active food packaging films). ILs/DESs in the film could also be further recycled by water or ethanol/methanol treatment followed by drying/evaporation. One particularly promising approach is to use bioactive cholinium-based ILs and DESs with good safety and plasticizing ability to improve the functional properties of prepared films. Whole extracts by ILs/DESs from various byproducts can also be directlyThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Effects of Deep Eutectic Solvents on cellulosic fibres and paper properties: Green “chemical” refining

Cited by 25 publications

References 51 publications

Functional deep eutectic solvent for lignocellulose valorization via lignin stabilization and cellulose functionalization

Functional deep eutectic solvent for lignocellulose valorization via lignin stabilization and cellulose functionalization

Insights into the critical role of anions in nanofibrillation of cellulose in deep eutectic solvents

Advances in green solvents for production of polysaccharide‐based packaging films: Insights of ionic liquids and deep eutectic solvents

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