Separation and characterization of cellulose fibers from cypress wood treated with ionic liquid prior to laccase treatment
[Display omitted] ► Wood biomass is treated with an IL and IL is recovered prior to enzymatic delignification. ► IL pretreatment improved the delignification efficiency significantly. ► The α-cellulose content of produced fibers is as high as 73.1%. ► Obtained cellulose fibers had a higher crystalli...
Gespeichert in:
Veröffentlicht in: | Bioresource technology 2013-01, Vol.127, p.132-137 |
---|---|
Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | [Display omitted]
► Wood biomass is treated with an IL and IL is recovered prior to enzymatic delignification. ► IL pretreatment improved the delignification efficiency significantly. ► The α-cellulose content of produced fibers is as high as 73.1%. ► Obtained cellulose fibers had a higher crystallinity and thermal stability than untreated wood fibers.
Separation of cellulose fibers (CFs) from woody biomass with minimal structural alteration using a “green” and efficient method was achieved by treatment with the ionic liquid (IL), [emim][OAc] (1-ethyl-3-methylimidazolium acetate) at 80°C for 1h. The IL was recovered by rinsing with water–acetone mixture prior to treatment of the wood with Trametes sp. laccase in the presence of 1-hydroxybenzotriazole as a mediator. IL pretreatment did not significantly change the chemical composition of the wood, but did alter its structure and rendered its surface more accessible to the enzyme. Treated and untreated samples were characterized by SEM, FTIR, XRD, TGA, and chemical methods. The cellulose content of the produced fibers was approximately 73.1% and the lignin content was 9.8%, much lower than the lignin content of 29.3% of the untreated wood. The cellulose fibers exhibited higher cellulose crystallinity and better thermal stability compared to untreated wood materials. |
---|---|
ISSN: | 0960-8524 1873-2976 |
DOI: | 10.1016/j.biortech.2012.09.113 |