NDLI: Cell wall disruption in low temperature NaOH/urea solution and its potential application in lignocellulose pretreatment

Content Provider	Springer Nature Link
Author	Wang, Qianqian Wei, Wei Kingori, Gakai Peter Sun, Jianzhong
Copyright Year	2015
Abstract	Pretreatments of wheat straw by NaOH/urea solvent at low temperature were investigated. To understand the cell wall disruption during this low temperature process, and its impacts on enzymatic hydrolysis, morphology, cellulose crystal structure, and chemical properties were investigated by using the following instruments: optical microscopy, confocal laser scanning microscopy, Fourier transform infrared spectra, and X-ray diffraction. The results implied that the deconstruction of plant cell wall at low temperature was attributed to disruption of the hydrogen bonds in cellulose and solubilization of hemicellulose and lignin. Meanwhile, the pretreatment approach resulted in almost full recovery of cellulose, approximately 60 % of lignin and 70 % of xylan removal, respectively. It’s interesting to note that cellulose I crystal structure in the substrate pretreated at a solid loading of 10 % was partially changed to cellulose II structure, while wheat straw pretreated at a higher solid loading of 20 %, retained the cellulose I structure. Almost complete saccharification (>95 %) of cellulose in pretreated substrates was achieved at a relatively low cellulase loading of 10 FPU/g substrates within 48 h. The loss of xylan in pretreated substrate had a negative effect on the total sugar recovery.
Starting Page	3559
Ending Page	3568
Page Count	10
File Format	PDF
ISSN	09690239
Journal	Cellulose
Volume Number	22
Issue Number	6
e-ISSN	1572882X
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-09-24
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cellulose solvent Alkaline Cell wall disruption Lignocellulose Pretreatment Bioorganic Chemistry Physical Chemistry Organic Chemistry Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Polymers and Plastics

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