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Solvation behavior of cellulose and xylan in the MIM/EMIMAc ionic liquid solvent system: Parameters for small-scale solvation
KTH, Skolan för kemivetenskap (CHE), Centra, Wallenberg Wood Science Center.
2014 (engelsk)Inngår i: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 9, nr 1, s. 1038-1054Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Ionic liquid treatment has been reported by several researchers as a possible step in the process of fractionating lignocellulosic biomass within the biorefinery concept. However, understanding how solvation can be achieved and how the feedstock biopolymers are affected is needed prior to a viable implementation. An effective two-component solvent system for the wood components cellulose and xylan has been developed. Furthermore, the solvation of these components in the system consisting of the ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate (EMIMAc) in a novel combination with the co-solvent 1-methylimidazole (MIM) is investigated. Focused beam reflectance measurement (FBRM) particle characterization in combination with microscopic analysis and molecular weight determinations (xylan) shows that cellulose and xylan can be most efficiently solvated using only 3 to 4% IL (n/n anhydro-glucose units and n/n anhydro-xylose units) and 9% IL, respectively, while still avoiding any significant polymer degradation. A model for a two-step process of cellulose solvation in the present system is proposed.

sted, utgiver, år, opplag, sider
2014. Vol. 9, nr 1, s. 1038-1054
Emneord [en]
Cellulose, FBRM, Ionic liquid, Solvation, Xylan
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-143014ISI: 000331996500080Scopus ID: 2-s2.0-84892647803OAI: oai:DiVA.org:kth-143014DiVA, id: diva2:705102
Forskningsfinansiär
Knut and Alice Wallenberg Foundation
Merknad

QC 20140314

Tilgjengelig fra: 2014-03-14 Laget: 2014-03-14 Sist oppdatert: 2017-12-05bibliografisk kontrollert

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