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Cellulose solvent-based biomass pretreatment breaks highly ordered hydrogen bonds in cellulose fibers of switchgrass

Biotechnology and bioengineering, 2011-03, Vol.108 (3), p.521-529 [Peer Reviewed Journal]

Copyright © 2010 Wiley Periodicals, Inc. ;2015 INIST-CNRS ;Copyright John Wiley and Sons, Limited Mar 2011 ;ISSN: 0006-3592 ;ISSN: 1097-0290 ;EISSN: 1097-0290 ;DOI: 10.1002/bit.22964 ;PMID: 20967803 ;CODEN: BIBIAU

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Title:
Cellulose solvent-based biomass pretreatment breaks highly ordered hydrogen bonds in cellulose fibers of switchgrass
Author: Sathitsuksanoh, Noppadon ; Zhu, Zhiguang ; Wi, Sungsool ; Percival Zhang, Y.-H.
Subjects: Biofuel production ; biofuels ; Biological and medical sciences ; Biomass ; Biotechnology ; Biotechnology - methods ; Cellulase ; Cellulose ; Cellulose - chemistry ; Cellulose - metabolism ; Cellulose - ultrastructure ; cellulose accessibility ; Cellulose fibers ; cellulose solvent-based pretreatment ; Chemical Fractionation ; crystallinity index ; Diffraction ; drying of cellulose ; Energy ; Enzymes ; Fundamental and applied biological sciences. Psychology ; Glucan ; Hydrolysis ; Industrial applications and implications. Economical aspects ; Magnetic Resonance Spectroscopy ; Microscopy, Electron, Scanning ; Nuclear magnetic resonance ; Panicum - chemistry ; Panicum - drug effects ; Panicum - metabolism ; Panicum - ultrastructure ; Pretreatment ; Scanning electron microscopy ; Solvents ; Solvents - chemistry ; Solvents - metabolism ; Spectroscopy, Fourier Transform Infrared ; Spectrum analysis ; switchgrass
Is Part Of: Biotechnology and bioengineering, 2011-03, Vol.108 (3), p.521-529
Description: The switchgrass (SG) samples pretreated by cellulose solvent‐ and organic solvent‐based lignocellulose fractionation were characterized by enzymatic hydrolysis, substrate accessibility assay, scanning electron microscopy, X‐ray diffraction (XRD), cross polarization/magic angle spinning (CP/MAS) 13C nuclear magnetic resonance (NMR), and Fourier transform infrared spectroscopy (FTIR). Glucan digestibility of the pretreated SG was 89% at hour 36 at one filter paper unit of cellulase per gram of glucan. Crystallinity index (CrI) of pure cellulosic materials and SG before and after cellulose solvent‐based pretreatment were determined by XRD and NMR. CrI values varied greatly depending on measurement techniques, calculation approaches, and sample drying conditions, suggesting that the effects of CrI data obtained from dried samples on enzymatic hydrolysis of hydrated cellulosic materials should be interpreted with caution. Fast hydrolysis rates and high glucan digestibilities for pretreated SG were mainly attributed to a 16.3‐fold increase in cellulose accessibility to cellulase from 0.49 to 8.0 m2/g biomass, because the highly ordered hydrogen‐bonding networks in cellulose fibers of biomass were broken through cellulose dissolution in a cellulose solvent, as evidenced by CP/MAS 13C‐NMR and FTIR. Biotechnol. Bioeng. 2011; 108:521–529. © 2010 Wiley Periodicals, Inc.
Publisher: Hoboken: Wiley Subscription Services, Inc., A Wiley Company
Language: English
Identifier: ISSN: 0006-3592
ISSN: 1097-0290
EISSN: 1097-0290
DOI: 10.1002/bit.22964
PMID: 20967803
CODEN: BIBIAU
Source: MEDLINE
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Cellulose solvent-based biomass pretreatment breaks highly ordered hydrogen bonds in cellulose fibers of switchgrass

Copyright © 2010 Wiley Periodicals, Inc. ;2015 INIST-CNRS ;Copyright John Wiley and Sons, Limited Mar 2011 ;ISSN: 0006-3592 ;ISSN: 1097-0290 ;EISSN: 1097-0290 ;DOI: 10.1002/bit.22964 ;PMID: 20967803 ;CODEN: BIBIAU

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