Abstract
Efficient fractionation and valorization of biomass major components are important for biomass utilization. Deep eutectic solvent (DES) treatment is a promising method for biomass processing. In this study, a choline chloride oxalic acid dihydrate (ChCl-OA) DES treatment method was developed to efficiently separates biomass components and isolate the lignin from bamboo. Hemicellulose (from 16.2 to 3.2%) and lignin (from 27.4 to 4.9%) components in recovery solid were significantly reduced. Results revealed that the DES-extracted lignin (DESL) had a higher yield (82.1%) and purity (94.9%), but a lower molecular weight (1148 g/mol) compared with the milling wood lignin (MWL) and alkali lignin (AL). Meanwhile, the DESL from the acid DES pretreatment of bamboo biomass was beneficial to the preparation of stable and homogenous lignin nanoparticles (LNPs). This study provides an efficient method to separate the main components of biomass and prepare LNPs. The DES treatment showed great potential for biomass component fractionation and lignin valorization.
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Funding
This work was supported by the National Natural Science Foundation of China (51903131), Natural Science Foundation of Shandong Province (ZR2019QEM007 and ZR2020ME076), Key Research and Development Program of Shandong Province (2020CXGC011101), Science Research Foundation of Dezhou University (2021xjrc207), State Key Laboratory of Bio-Fibers and Eco-Textiles (Qingdao University) (ZKT16 and ZKT21) and Special Foundation of “Taishan Scholar” Construction Program (ts20190932).
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Kai Nie: writing — original draft. Yan Song, Wanwan Lv, Tao Zhao, Boya Li, and Linlin Li: writing — review and editing. Guangting Han: funding acquisition and supervision. Shaoyang Liu, Wei Jiang: supervision; writing — review, and editing.
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Nie, K., Liu, S., Zhao, T. et al. Efficient fractionation of biomass by acid deep eutectic solvent (DES) and rapid preparation of lignin nanoparticles. Biomass Conv. Bioref. (2022). https://doi.org/10.1007/s13399-022-03496-9
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DOI: https://doi.org/10.1007/s13399-022-03496-9