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Antioxidant Activity and Pyrolysis Properties of Lignin Extracted from Camellia oleifera Shell by Deep Eutectic Solvents (DES)
- Source :
- Shipin gongye ke-ji, Vol 43, Iss 24, Pp 261-267 (2022)
- Publication Year :
- 2022
- Publisher :
- The editorial department of Science and Technology of Food Industry, 2022.
-
Abstract
- In order to obtain lignin with low molecular weight and polydispersity, as well as high antioxidant activity, using Camellia oleifera shell as raw material, four lignin products were isolated from it by alkaline and deep eutectic solvents. The structural and pyrolysis properties of lignin were investigated with ultraviolet spectroscopy (UV), Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC) and thermogravimetric analyzer (TGA). Furthermore, the antioxidant activity of the lignin samples was evaluated by 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity assay. The UV and FTIR analyses showed that the lignin from Camellia oleifera shell was mainly composed of guaiacyl and syringyl. GPC analysis revealed that AL had a relatively higher molecular weight (Mw=41858 g/mol) and broad polydispersity index (PDI=4.53), and the DES-lignin exhibited relatively low relative molecular weight (MwAL>ChCl-EG-P>ChCl-GA. Furthermore, the results showed that four lignin products had good antioxidant activity in vitro, and the IC50 values of DPPH free radical scavenging ability was 0.388~1.02 mg/mL. The findings of this study would provide a novel way to fractionate lignin from Camellia oleifera shell, and provide certain reference value for the development of lignin valorization.
Details
- Language :
- Chinese
- ISSN :
- 10020306
- Volume :
- 43
- Issue :
- 24
- Database :
- Directory of Open Access Journals
- Journal :
- Shipin gongye ke-ji
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.1e7dcd3355e4ab8a53e627c13141225
- Document Type :
- article
- Full Text :
- https://doi.org/10.13386/j.issn1002-0306.2022040112