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Co-Production of Cellulose Nanocrystals and Fermentable Sugars Assisted by Endoglucanase Treatment of Wood Pulp

Materials, 2018-09, Vol.11 (9), p.1645 [Peer Reviewed Journal]

2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;2018 by the authors. 2018 ;ISSN: 1996-1944 ;EISSN: 1996-1944 ;DOI: 10.3390/ma11091645 ;PMID: 30205440

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  • Title:
    Co-Production of Cellulose Nanocrystals and Fermentable Sugars Assisted by Endoglucanase Treatment of Wood Pulp
  • Author: Dai, Jing ; Chae, Michael ; Beyene, Dawit ; Danumah, Christophe ; Tosto, Frank ; Bressler, David C
  • Subjects: acid hydrolysis ; Biofuels ; Cellulase ; Cellulose ; Cellulose fibers ; cellulose nanocrystals ; Degree of crystallinity ; Endoglucanase ; endoglucanase treatment ; Enzymes ; Experiments ; fermentable sugars ; Fermentation ; Fourier transforms ; Glucan ; Glucose ; Hydrolysis ; Infrared radiation ; Lignin ; Nanocrystals ; Nanomaterials ; Photon correlation spectroscopy ; Raw materials ; Sugar ; Wood pulp
  • Is Part Of: Materials, 2018-09, Vol.11 (9), p.1645
  • Description: In this study, fermentable sugars and cellulose nanocrystals (CNCs) were co-produced from endoglucanase treatment of wood pulp, followed by acid hydrolysis. Enzymatic hydrolysis was performed using two endoglucanases differentiated by the presence or absence of a cellulose-binding domain (CBD). The enzyme with an intact CBD gave the higher glucan conversion (up to 14.1 ± 1.2 wt %) and improved the degree of crystallinity of the recovered wood pulp fiber (up to 83.0 ± 1.0%). Thus, this endoglucanase-assisted treatment successfully removed amorphous content from the original cellulosic feedstock. CNC recovery (16.9 ± 0.7 wt %) from the feedstock going into the acid hydrolysis was improved relative to untreated pulp (13.2 ± 0.6 wt %). The mass loss from enzymatic treatment did not cause a decrease in the CNC yield from the starting material. The characteristics of CNCs obtained through acid hydrolysis (with or without enzyme treatment of pulp) were analyzed using X-ray diffraction, transmission electron microscopy, dynamic light scattering, Fourier transform infrared spectroscopy, and differential scanning calorimetry as characterization techniques. The CNCs generated through acid hydrolysis of endoglucanase-treated wood pulp displayed comparable properties relative to those generated using untreated pulp. Thus, endoglucanase treatment can enable co-production of CNCs and sugars for biofuel fermentation.
  • Publisher: Switzerland: MDPI AG
  • Language: English
  • Identifier: ISSN: 1996-1944
    EISSN: 1996-1944
    DOI: 10.3390/ma11091645
    PMID: 30205440
  • Source: Freely Accessible Journals
    PubMed Central
    ROAD: Directory of Open Access Scholarly Resources
    ProQuest Central
    DOAJ Directory of Open Access Journals
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