Acid-free extraction of cellulose type I nanocrystals using Brønsted acid-type ionic liquids. Issue 2 (2nd April 2016)

• Record Type: Journal Article
• Authors: Lazko, Jevgenij; Sénéchal, Tangi; Bouchut, Arthur; Paint, Yoann; Dangreau, Lisa; Fradet, Alain; Tessier, Martine; Raquez, Jean Marie; Dubois, Philippe
• Is Part Of: Nanocomposites. Volume 2:Issue 2(2016)
• Page Start: 65
• Page End: 75
• Publication Date: 2016-04-02
• Subjects: Cellulose nanocrystals -- Ionic liquids -- Hydrolysis -- Swelling -- Recycling; Nanocomposites (Materials) -- Periodicals; 620.11805
• DOI: 10.1080/20550324.2016.1199410
• Languages: English
• ISSNs: 2055-0324

Abstract

Abstract: Extraction of cellulose type I nanocrystals from cotton fibers was straightforwardly carried out using exclusively Brønsted acid-type ionic liquids (ILs) via a two-step swelling/hydrolysis route, the switch between these two stages being induced by water addition. Since the whole process was achieved in a single reaction medium predominantly based on 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) and 1-(4-sulfobutyl)-3-methylimidazolium hydrogen sulfate ([SBMIM]HSO4 ), the process parameters were investigated in order to ensure a perfect compatibility and sequencing towards the two-step route proposed here. The impacts on nanoparticle morphology, crystallinity evolution, and cellulose type I to type II denaturation were observed under field-emission gun scanning electron microscopy and corroborated by X-ray diffraction characterizations. ILs recovery and reuse were also demonstrated, opening up new prospects of conception of multi-cycle, environmentally and economically sustainable processes. Abstract :