Journal
INDUSTRIAL CROPS AND PRODUCTS
Volume 80, Issue -, Pages 86-92Publisher
ELSEVIER
DOI: 10.1016/j.indcrop.2015.11.024
Keywords
Lignosulfonate-based polyoxyethylene ether; PEG; Hydrophilicity; Enzymatic hydrolysis; Corn stover; CTAB
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Funding
- International S&T Cooperation Program of China [2013DFA41670]
- National Natural Science Foundation of China [21376100]
- Guangdong Province Science and Technology Plan [2013B051000011]
- Fundamental Research Funds for Central Universities of China [2014ZG0022]
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Effect of the molecular structure of lignosulfonate-based polyoxyethylene ether (LS-PEG) on the enzymatic hydrolysis of Avicel and corn stover was investigated. With the increase of PEG contents and M-w of LS-PEG, glucose yield of corn stover increased from 16.7% to 51.9%. When LS-PEG was compounded with cationic surfactant cetyltrimethylammonium bromide (CTAB), the enhancement of glucose yield of corn stover was further increased from 45.3% to 62.8%. Sulfonic group of LS-PEG preferentially interacted with quaternary ammonium group of CTAB by the electrostatic attraction to form a similar non-ionic surfactant CTAB-LS-PEG. CTAB-LS-PEG showed electrically neutral and more hydrophobic, and blocked more nonproductive adsorption of cellulase on the lignin. Therefore, CTAB-LS-PEG enhanced enzymatic hydrolysis efficiency of lignocelluloses more significantly. The understanding developed in this study can help to develop potential approaches and strategies for effective application of lignosulfonate to improve bioconversion of lignocellulosic biomass. (C) 2015 Elsevier B.V. All rights reserved.
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