Document Detail

Reversible swelling of the cell wall of poplar biomass by ionic liquid at room temperature.
MedLine Citation:
PMID:  21247757     Owner:  NLM     Status:  MEDLINE    
Time-resolved autofluorescence, Raman microspectroscopy, and scanning microprobe X-ray diffraction were combined in order to characterize lignocellulosic biomass from poplar trees and how it changes during treatment with the ionic liquid 1-n-ethyl-3-methylimidazolium acetate (EMIMAC) at room temperature. The EMIMAC penetrates the cell wall from the lumen, swelling the cell wall by about a factor of two towards the empty lumen. However, the middle lamella remains unchanged, preventing the cell wall from swelling outwards. During this swelling, most of the cellulose microfibrils are solubilized but chain migration is restricted and a small percentage of microfibrils persist. When the EMIMAC is expelled, the cellulose recrystallizes as microfibrils of cellulose I. There is little change in the relative chemical composition of the cell wall after treatment. The action of EMIMAC on the poplar cell wall at room temperature would therefore appear to be a reversible swelling and a reversible decrystallization of the cell wall.
Marcel Lucas; Greg L Wagner; Yoshiharu Nishiyama; Leif Hanson; Indira P Samayam; Constance A Schall; Paul Langan; Kirk D Rector
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2010-12-30
Journal Detail:
Title:  Bioresource technology     Volume:  102     ISSN:  1873-2976     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-02-14     Completed Date:  2011-05-23     Revised Date:  2013-06-30    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  4518-23     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier Ltd. All rights reserved.
Chemistry Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
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MeSH Terms
Cell Wall / chemistry*,  drug effects*
Ionic Liquids / pharmacology*
Populus / cytology*,  drug effects*
Spectrum Analysis, Raman
X-Ray Diffraction
Grant Support
Reg. No./Substance:
0/Ionic Liquids

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