期刊
BIORESOURCE TECHNOLOGY
卷 238, 期 -, 页码 254-262出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.03.097
关键词
Sugars; Lignosulfonates; Cellulose; Cellulose nanocrystals; Co-production; Particle size; Aspect ratio; Crystallinity; Mass balance
资金
- Agriculture and Food Research Initiative Competitive Grant from the USDA National Institute of Food and Agriculture, United States [2011-68005-30416]
- China Scholarship Council (CSC) fundings, China
This study demonstrated the technical potential for the large-scale co-production of sugars, lignosulfonates, cellulose, and cellulose nanocrystals. Ball-milled woods with two particle sizes were prepared by ball milling for 80 min or 120 min (BMW80, BMW120) and then enzymatically hydrolyzed. 78.3% cellulose conversion of BMW120 was achieved, which was three times as high as the conversion of BMW80. The hydrolyzed residues (HRs) were neutrally sulfonated cooking. 57.72 g/L and 88.16 g/L lignosulfonate concentration, respectively, were harvested from HR80 and HR120, and 42.6 +/- 0.5% lignin were removed. The subsequent solid residuals were purified to produce cellulose and then this material was acidhydrolyzed to produce cellulose nanocrystals. The BMW120 maintained smaller particle size and aspect ratio during each step of during the multiple processes, while the average aspect ratio of its cellulose nanocrystals was larger. The crystallinity of both materials increased with each step of wet processing, reaching to 74% for the cellulose. (C) 2017 Elsevier Ltd. All rights reserved.
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