期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 193, 期 -, 页码 64-70出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2021.10.120
关键词
Deep eutectic solvent; Catalyst; Lignin; Poplar wood; Antioxidant activity
资金
- China National Key Research and Development Plan Project [2017YFB0307901]
In this study, DESs system of ChCl/Lac was shown to be an effective strategy for lignin extraction, with two different solid acids (SA) promoting the pretreatment of lignocellulose. Lignin extraction rates exceeded 80% under different DESs systems.
Pure deep eutectic solvents (DESs) system of choline chloride (ChCl)/Lactic acid (Lac) were demonstrated to be an effective strategy for extraction of lignin. In this study, two kinds of different promising solid acid (SA) with DESs were designed to promote the pretreatment of lignocellulose. The SA of phosphotungstic acid (H3O40PW12) and iron bromide (FeBr3) were introduced into DESs to extract poplar wood lignin and evaluate the antioxidant activity. It was found that 82.2% and 80.9% of lignin were obtained from poplar wood under H3O40 PW12-ChCl/ Lac acid and FeBr3-choline ChCl/Lac system with 4 h and 8 h, respectively. The lignin fractions with a high purity (>89%), low molecular weight (Mw 1800-2000 g/mol). Besides, the antioxidant activities of lignin fractions were better than butyl hydroxyanisole (BHA). Therefore, DES lignin has prominent antioxidant activity and could developed a potential natural cosmetics and food packaging.
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