期刊
BIORESOURCE TECHNOLOGY
卷 244, 期 -, 页码 717-725出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.08.032
关键词
Bamboo; Lignin changes; Structural characterization; Pretreatment; 2D-HSQC spectra
资金
- Fundamental Research Funds for the Central Universities [2017JC13]
- National Natural Science Foundation of China [31500486, 31430092]
- Open Foundation of the State Key Laboratory of Pulp and Paper Engineering [201749]
In this study, bamboo (Phyllostachys pubescens) was successfully deconstructed using an integrated process (autohydrolysis and subsequent delignification). Xylooligosaccharides, high-purity lignin, and digestible substrates for producing glucose can be consecutively collected during the integrated process. The structural change and fate of lignin during autohydrolysis process was deeply investigated. Additionally, the structural characteristics and active functional groups of the lignin fractions obtained by these delignification processes were thoroughly investigated by NMR (2D-HSQC and P-31 NMR) and GPC techniques. The chemical compositions (S, G, and H) and major linkages (beta-O-4, beta-beta, beta-5, etc.) were thoroughly assigned and the frequencies of the major lignin linkages were quantitatively compared. Considering the structural characteristics and molecular weights of the lignin as well as enzymatic saccharification ratio of the substrate, the combination of autohydrolysis and organic base-catalyzed ethanol pretreatment was deemed as a promising biorefinery mode in the future based on bamboo feedstock.
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