title: A New Way to Produce Cellobiose Carbonates Using Green Chemistry.
abstract: The preparation of cellulose derivatives using green (i.e., environmentally friendly) reagents would improve sustainability and reduce concerns arising from the use of non-green reagents. The objective of this work was to prepare cellobiose carbonate using a green reagent, dimethyl carbonate. The carbonation reaction was carried out in the presence of ethanolic potassium hydroxide solution and dimethyl carbonate for 6 h at a range of temperatures (25-70 °C). A cellobiose derivative was successfully prepared with a recovered yield of more than 70 % and characterized by FTIR and NMR spectroscopy techniques. The presence of a grafted disaccharide with a degree of substitution higher than 2 was determined by (13) C NMR analysis. The spectra of the prepared cellobiose carbonate exhibited peaks that were associated with cellulose molecules (C1 -C6 ) and corresponded to carbonate functions at around 159.4 ppm.
authors.affiliation: URCAE 13 ES 63, Faculty of Science Monastir, University of Monastir, Avenue de l'environnement, 5019, Monastir, Tunisie.|Univ. Grenoble Alpes, LGP2, F-38000, Grenoble, France.|CNRS, LGP2, F-38000, Grenoble, France.|Centre de Formation d'Apprentis Agefpi.
authors.forename: R
authors.initials: R
authors.lastname: Khiari
authors.affiliation: Univ. Grenoble Alpes, LGP2, F-38000, Grenoble, France.|CNRS, LGP2, F-38000, Grenoble, France.|Centre de Formation d'Apprentis Agefpi.
authors.forename: M-C
authors.initials: MC
authors.lastname: Brochier-Salon
authors.affiliation: URCAE 13 ES 63, Faculty of Science Monastir, University of Monastir, Avenue de l'environnement, 5019, Monastir, Tunisie.
authors.forename: M F
authors.initials: MF
authors.lastname: Mhenni
authors.affiliation: Univ. Grenoble Alpes, LGP2, F-38000, Grenoble, France.|CNRS, LGP2, F-38000, Grenoble, France.|Centre de Formation d'Apprentis Agefpi.
authors.forename: E
authors.initials: E
authors.lastname: Mauret
authors.affiliation: Univ. Grenoble Alpes, LGP2, F-38000, Grenoble, France. naceur.belgacem@pagora.grenoble-inp.fr.|CNRS, LGP2, F-38000, Grenoble, France. naceur.belgacem@pagora.grenoble-inp.fr.|Centre de Formation d'Apprentis Agefpi. naceur.belgacem@pagora.grenoble-inp.fr.
authors.forename: M N
authors.identifier: 0000-0002-3317-7369
authors.initials: MN
authors.lastname: Belgacem
mesh_terms: D002475:Cellobiose / Q000737:chemistry*; D000431:Ethanol / Q000737:chemistry; D005561:Formates / Q000737:chemistry*; D055772:Green Chemistry Technology / Q000379:methods*; D006878:Hydroxides / Q000737:chemistry; D017680:Potassium Compounds / Q000737:chemistry; D013696:Temperature
chemical_list: D005561:Formates; D006878:Hydroxides; D017680:Potassium Compounds; D002475:Cellobiose; D000431:Ethanol; C023025:methyl carbonate; C029943:potassium hydroxide
keywords: cellobiose; chemical grafting; degree of substitution; dimethyl carbonate; nmr