Impact of ionic liquid 1-ethyl-3-methylimidazolium acetate mediated extraction on lignin features

Abstract: This study aims at investigating the impact of ionic liquid extraction on lignin structure by studying the mechanism of lignin depolymerization in 1-ethyl-3-methylimidazolium acetate EMIM[OAc]) and comparing it with that of organosolv and milled wood methods. Ionic liquid mediated lignin (ILL) using EMIM[OAc]), ethanol organosolv lignin (EOL) and milled wood lignin (MWL) were isolated from Typha capensis (TC) and subjected to several analytical characterizations. Experimental data shows that ILL exhibited a relatively lower degree of condensation, lower aromatic C-C structures and a higher aliphatic OH with values of 0.42/Ar, 1.94/Ar and 1.33/Ar moieties compared with EOL values of 0.92/Ar, 2.22/Ar and 0.51/Ar moieties respectively. The ILL was depolymerized under mild conditions giving relatively higher β-aryl ether linkages content, higher molecular mass, and exhibited closer structures and reactivity to native lignin than EOL. These insights on TC lignin depolymerization in EMIM[OAc]) acetate may contribute to better value-addition of lignocellulosic biomass

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch
Notes
Green and sustainable chemistry. - 07, 02 (2017) , 114-140, ISSN: 2160-696X

Event
Veröffentlichung
(where)
Freiburg
(who)
Universität
(when)
2019
Creator
Audu, Idi Guga
Ziegler-Devin, Isabelle
Winter, Heiko
Bremer, Martina
Hoffmann, Anton
Fischer, Steffen
Laborie, Marie-Pierre
Brosse, Nicolas

DOI
10.4236/gsc.2017.72010
URN
urn:nbn:de:bsz:25-freidok-1385534
Rights
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
25.03.2025, 1:49 PM CET

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Associated

Time of origin

  • 2019

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