期刊
JOURNAL OF BIOTECHNOLOGY
卷 321, 期 -, 页码 35-47出版社
ELSEVIER
DOI: 10.1016/j.jbiotec.2020.07.001
关键词
Process integration; Two-stage hydrothermal treatment; Xylooligosaccharides nanocellulose; Cellulose nanofibrils
资金
- Sao Paulo Research Foundation - FAPESP [2015/02862-5]
- Brazilian National Council for Scientific and Technological Development - CNPq [308715/2015-2, 429895/2016-0]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) [001]
This work investigated the integration of a two-stage hydrothermal treatment for production of xylooligosaccharides (XOS), a high-value product, into the isolation process of cellulose nanofibrils (CNF) from sugarcane bagasse. Under optimized conditions, the first stage yielded a XOS-rich, high purity hydrolysate and in the second stage only a xylose-rich hydrolysate could be obtained at high purity. The resulting solid cellulosic fraction was delignified and bleached to obtain a cellulose-rich pulp, which was mechanically defibrillated by disc ultra-refining to CNF. Except for the viscosity, the sugarcane CNF showed properties (i.e., thermal stability, crystallinity and diameter size) comparable or superior to the CNF prepared from commercial bleached eucalyptus Kraft pulp. In conclusion, the integration of the two-stage hydrothermal treatment is an efficient and promising strategy to obtain hemicellulose-derived high-value co-products in the process of isolating CNF. In addition, lignin was also recovered as a co-product with yield comparable to other biomass fractionation approaches.
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