2020
DOI: 10.3390/ma13020278
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Study on the Dissolution Mechanism of Cellulose by ChCl-Based Deep Eutectic Solvents

Abstract: Four deep eutectic solvents (DESs), namely, glycerol/chlorocholine (glycerol/ChCl), urea/ChCl, citric acid/ChCl, and oxalic acid/ChCl, were synthesized and their performance in the dissolution of cellulose was studied. The results showed that the melting point of the DESs varied with the proportion of the hydrogen bond donor material. The viscosity of the DESs changed considerably with the change in temperature; as the temperature increased, the viscosity decreased and the electrical conductivity increased. Ox… Show more

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Cited by 84 publications
(59 citation statements)
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“…GLY can form three hydrogen bonds with ChCl and three with cellulose. Therefore, the number of hydrogen bonds with cellulose was relatively small for ChCl/GLY compared to ChCl/LA, and hence the dissolution of cellulose is more in LA than GLY (Zhang et al 2020). Furthermore, increase in the reaction time and HBD ratio also resulted in the increased dissolution, in accordance with the literature reports.…”
Section: Chemical Compositionssupporting
confidence: 89%
“…GLY can form three hydrogen bonds with ChCl and three with cellulose. Therefore, the number of hydrogen bonds with cellulose was relatively small for ChCl/GLY compared to ChCl/LA, and hence the dissolution of cellulose is more in LA than GLY (Zhang et al 2020). Furthermore, increase in the reaction time and HBD ratio also resulted in the increased dissolution, in accordance with the literature reports.…”
Section: Chemical Compositionssupporting
confidence: 89%
“…Increased force is associated with greater degree of damage to the crystal structure and lower melting point of DESs [ 40 ]. During the preparation process, the melting point is mainly affected by the molar ratio between the hydrogen bond acceptor and donor [ 41 ]. The appropriate molar ratio is correlated with lower melting point and larger operating temperature range during the extraction process, which is more conducive to transmission of the medium.…”
Section: Resultsmentioning
confidence: 99%
“…These solvents are intensively studied for the separation of plant cellulose from biomass containing lignin and hemicellulose [ 45 ]. DES’s ability to form networks of hydrogen bonds leads to the swelling [ 46 ] or even dissolution of cellulose [ 47 ]. Recent reviews on cellulose processing with DES and ILs [ 29 , 48 ] report that, in general, ILs are more active in cellulose dissolution than DES.…”
Section: Introductionmentioning
confidence: 99%