A selective cellulose/hemicellulose green solvents extraction from buckwheat chaff

Daniela Caputo; Caterina Fusco; Angelo Nacci; Gerardo Palazzo; Sergio Murgia; Lucia D'Accolti; Luigi Gentile

Carbohydrate Polymer Technologies and Applications (Dec 2021)

A selective cellulose/hemicellulose green solvents extraction from buckwheat chaff

Daniela Caputo,
Caterina Fusco,
Angelo Nacci,
Gerardo Palazzo,
Sergio Murgia,
Lucia D'Accolti,
Luigi Gentile

Affiliations

Daniela Caputo: Department of Chemistry, University of Bari ''Aldo Moro'', Via Orabona 4, Bari 70126, Italy
Caterina Fusco: ICCOM-CNR, Istituto di Chimica dei Composti Organometallici, Bari Section, Via Orabona 4, Bari 70125, Italy
Angelo Nacci: Department of Chemistry, University of Bari ''Aldo Moro'', Via Orabona 4, Bari 70126, Italy; ICCOM-CNR, Istituto di Chimica dei Composti Organometallici, Bari Section, Via Orabona 4, Bari 70125, Italy
Gerardo Palazzo: Department of Chemistry, University of Bari ''Aldo Moro'', Via Orabona 4, Bari 70126, Italy; Center for Colloid and Surface Science (CSGI), Sesto Fiorentino, Italy
Sergio Murgia: Center for Colloid and Surface Science (CSGI), Sesto Fiorentino, Italy; Department of Chemical and Geological Sciences, University of Cagliari, Cagliari, Italy; Department of Life and Environmental Sciences, University of Cagliari, Cagliari, Italy
Lucia D'Accolti: Department of Chemistry, University of Bari ''Aldo Moro'', Via Orabona 4, Bari 70126, Italy; Corresponding author.
Luigi Gentile: Department of Chemistry, University of Bari ''Aldo Moro'', Via Orabona 4, Bari 70126, Italy; Center for Colloid and Surface Science (CSGI), Sesto Fiorentino, Italy; Corresponding author at: Department of Chemistry, University of Bari ''Aldo Moro'', Via Orabona 4, Bari 70126, Italy.

Journal volume & issue: Vol. 2
p. 100094

Abstract

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A two-phase extraction process was adopted to obtain cellulose and hemicellulose from buckwheat chaff by using green solvents. We are proposing a combination of propylene carbonate (PC) and ionic liquids (ILs) in a 1:5 ratio. We compared the first-generation ILs 1-butyl-2,3-dimethylimidazolium chloride (BdmimCl), and 1-butyl-3-methyl imidazolium acetate (BmimAc) with respect to the tetrabutyl ammonium acetate (TBAAc). The cellulose and hemicellulose were, firstly, extracted into the PC/IL mixture and subsequently precipitated by water addition. All precipitate materials were analysed by FTIR-ATR and TGA, while the organic phase and the supernatant after water addition were analysed by using self-diffusion NMR. The PC green co-solvent was proven to be an exceptional candidate to replace dimethyl sulfoxide. The highest amount of precipitate material after water addition was obtained with PC-BmimAc, while PC-TBAAc was showing the highest cellulose/hemicellulose selectivity. Furthermore, a preferential interaction of the supernatant cellulose residue with PC or acetate was observed by self-diffusion NMR.

Published in Carbohydrate Polymer Technologies and Applications

ISSN: 2666-8939 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Science: Chemistry: Organic chemistry: Biochemistry
Website: https://www.journals.elsevier.com/carbohydrate-polymer-technologies-and-applications

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