期刊
CARBOHYDRATE POLYMERS
卷 125, 期 -, 页码 360-366出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2015.02.063
关键词
Old corrugated container (OCC); Cellulose nano-crystals (CNC); Phosphoric acid hydrolysis; Enzymatic hydrolysis; Sonication
资金
- National Natural Science Foundation of China [31100442]
- Zhejiang Provincial Natural Science Foundation of China [LY14C160003]
- Zhejiang Provincial Top Key Academic Discipline of Chemical Engineering, Technology, Zhejiang Open Foundation of the Most Important Subjects [2014YXQN01]
- 521 Talent Cultivation Program of Zhejiang Sci-Tech University [11110132521310]
- Open Foundation of the Key Lab of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology [201403]
Due to its amazing physicochemical properties and high environmental compatibility, cellulose nano-crystals (CNC) hold great promise for serving as a strategic platform for sustainable development. Now, there has been growing interest in the development of processes using waste or residual biomass as CNC source for addressing economic and environmental concerns. In the present work, a combined process involving phosphoric acid hydrolysis, enzymatic hydrolysis and sonication was proposed aiming to efficiently exact CNC from low-cost old corrugated container (OCC) pulp fiber. The effect of enzymatic hydrolysis on the yield and microstructure of resulting CNC was highlighted. Results showed that the enzymatic hydrolysis was effective in enhancing CNC yield after phosphoric acid hydrolysis. CNC was obtained with a yield of 23.98 wt% via the combined process with phosphoric acid concentration of 60 wt%, cellulase dosage of 2 mL (84 EGU) per 2 g fiber and sonication intensity of 200 W. Moreover, the presence of enzymatic hydrolysis imparted the obtained CNC with improved dispersion, increased crystallinity and thermal stability. (C) 2015 Elsevier Ltd. All rights reserved.
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