Effects of Delignification on Crystalline Cellulose in Lignocellulose Biomass Characterized by Vibrational Sum Frequency Generation Spectroscopy and X-ray Diffraction

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• 作者：Kabindra Kafle ; Christopher M. Lee ; Heenae Shin ; Justin Zoppe…
• 关键词：Biomass ; Crystalline cellulose ; Delignification ; Sum frequency generation spectroscopy ; X ; ray diffraction
• 刊名：BioEnergy Research
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：8
• 期：4
• 页码：1750-1758
• 全文大小：1,192 KB
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• 作者单位：Kabindra Kafle (1)
  Christopher M. Lee (1)
  Heenae Shin (2) (4)
  Justin Zoppe (2)
  David K. Johnson (3)
  Seong H. Kim (1)
  Sunkyu Park (2) (4)
  
  1. Department of Chemical Engineering and Material Research Institute, The Pennsylvania State University, University Park, PA, 16802, USA
  2. Department of Forest Biomaterials, North Carolina State University, Raleigh, NC, 27695, USA
  4. Department of Forest Sciences, Seoul National University, Seoul, South Korea
  3. Biosciences Center, National Renewable Energy Laboratory, Golden, CO, 80401, USA
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Biomaterials
  Biochemical Engineering
  Bioorganic Chemistry
  
• 出版者：Springer New York
• ISSN：1939-1242

文摘

Delignification, a common practice in the pulping industry, has been proposed and explored as a means to selectively remove lignin from lignocellulosic biomass and, thus, increase enzyme accessibility for cellulose hydrolysis. However, without knowing structural changes of cellulose in biomass, it is difficult to fully understand the effects of the delignification process on cellulose hydrolysis. In this study, the amount and aggregation of crystalline cellulose in hardwood biomass delignified using oxygen and sodium chlorite as reactive agents were examined with vibrational sum frequency generation (SFG) spectroscopy and X-ray diffraction (XRD). The results indicated that the amount of crystalline cellulose and the XRD crystallite size increased with both oxygen and chlorite delignification processes. In addition, the “οcellulose equivalent-fraction estimated by SFG spectroscopy increased greater than glucan amount with the delignification process. Changes in crystal size might be due to the aggregation of cellulose crystals, along with the increase in crystalline cellulose amount. Keywords Biomass Crystalline cellulose Delignification Sum frequency generation spectroscopy X-ray diffraction