Antioxidant Activity and Pyrolysis Properties of Lignin Extracted from Camellia oleifera Shell by Deep Eutectic Solvents (DES)
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 inves...
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| Format: | Article |
| Language: | zho |
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The editorial department of Science and Technology of Food Industry
2022-12-01
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| Series: | Shipin gongye ke-ji |
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| Online Access: | http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2022040112 |
| _version_ | 1811178417131880448 |
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| author | Feng LI Yiqing LI Haili MAO Dena HUANG Chenglu ZENG |
| author_facet | Feng LI Yiqing LI Haili MAO Dena HUANG Chenglu ZENG |
| author_sort | Feng LI |
| collection | DOAJ |
| description | 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 (Mw<11000 g/mol) and narrow polydispersity index (PDI<2). Thermogravimetric analysis showed that the thermal stability of lignin samples was ChCl-OA>AL>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. |
| first_indexed | 2024-04-11T06:19:02Z |
| format | Article |
| id | doaj.art-e1e7dcd3355e4ab8a53e627c13141225 |
| institution | Directory Open Access Journal |
| issn | 1002-0306 |
| language | zho |
| last_indexed | 2024-04-11T06:19:02Z |
| publishDate | 2022-12-01 |
| publisher | The editorial department of Science and Technology of Food Industry |
| record_format | Article |
| series | Shipin gongye ke-ji |
| spelling | doaj.art-e1e7dcd3355e4ab8a53e627c131412252022-12-22T04:40:58ZzhoThe editorial department of Science and Technology of Food IndustryShipin gongye ke-ji1002-03062022-12-01432426126710.13386/j.issn1002-0306.20220401122022040112-24Antioxidant Activity and Pyrolysis Properties of Lignin Extracted from Camellia oleifera Shell by Deep Eutectic Solvents (DES)Feng LI0Yiqing LI1Haili MAO2Dena HUANG3Chenglu ZENG4School of Chemistry and Chemical Engineering, Qiannan Normal College for Nationalities, Duyun 558000, ChinaSchool of Chemistry and Chemical Engineering, Qiannan Normal College for Nationalities, Duyun 558000, ChinaSchool of Chemistry and Chemical Engineering, Qiannan Normal College for Nationalities, Duyun 558000, ChinaSchool of Chemistry and Chemical Engineering, Qiannan Normal College for Nationalities, Duyun 558000, ChinaSchool of Chemistry and Chemical Engineering, Qiannan Normal College for Nationalities, Duyun 558000, ChinaIn 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 (Mw<11000 g/mol) and narrow polydispersity index (PDI<2). Thermogravimetric analysis showed that the thermal stability of lignin samples was ChCl-OA>AL>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.http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2022040112camellia oleifera shelllignindeep eutectic solventsstructural characterizationantioxidant activity |
| spellingShingle | Feng LI Yiqing LI Haili MAO Dena HUANG Chenglu ZENG Antioxidant Activity and Pyrolysis Properties of Lignin Extracted from Camellia oleifera Shell by Deep Eutectic Solvents (DES) Shipin gongye ke-ji camellia oleifera shell lignin deep eutectic solvents structural characterization antioxidant activity |
| title | Antioxidant Activity and Pyrolysis Properties of Lignin Extracted from Camellia oleifera Shell by Deep Eutectic Solvents (DES) |
| title_full | Antioxidant Activity and Pyrolysis Properties of Lignin Extracted from Camellia oleifera Shell by Deep Eutectic Solvents (DES) |
| title_fullStr | Antioxidant Activity and Pyrolysis Properties of Lignin Extracted from Camellia oleifera Shell by Deep Eutectic Solvents (DES) |
| title_full_unstemmed | Antioxidant Activity and Pyrolysis Properties of Lignin Extracted from Camellia oleifera Shell by Deep Eutectic Solvents (DES) |
| title_short | Antioxidant Activity and Pyrolysis Properties of Lignin Extracted from Camellia oleifera Shell by Deep Eutectic Solvents (DES) |
| title_sort | antioxidant activity and pyrolysis properties of lignin extracted from camellia oleifera shell by deep eutectic solvents des |
| topic | camellia oleifera shell lignin deep eutectic solvents structural characterization antioxidant activity |
| url | http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2022040112 |
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