Evaluation of Acidic Deep Eutectic Solvents Treatment on Enzymatic Hydrolysis Lignins: Structural Analysis and Antioxidant Activity DOI Open Access

Qiaorun Ma,

Xun Meng,

Hongtao Shi

et al.

Polymers, Journal Year: 2025, Volume and Issue: 17(8), P. 1006 - 1006

Published: April 8, 2025

The high-value utilization of enzymatic hydrolysis lignin (EHL) is essential for promoting the development biorefinery industry. This study investigated enhancement antioxidant activity and ultraviolet (UV) absorption capacity EHL through treatment with choline chloride (ChCl)-based acidic deep eutectic solvents (DESs). yield, chemical structure, UV properties, activity, thermal stability degraded regenerated (DEHL) were analyzed. results indicated that DESs effectively preserved aromatic structure EHL. Compared to untreated EHL, DEHL exhibited an increased O/C atomic ratio, a decreased transmittance, significant reduction in weight-average molecular weight (Mw), notable increase phenolic hydroxyl (ArOH) content. Notably, treated ChCl–p-toluenesulfonic acid had lowest Mw (1586 g/mol) highest ArOH Except ChCl–malic ChCl–acetic systems, all other five DES treatments enhanced varying degrees. Among them, IC50 DPPH value 262.87 μg/mL.

Language: Английский

Evaluation of Acidic Deep Eutectic Solvents Treatment on Enzymatic Hydrolysis Lignins: Structural Analysis and Antioxidant Activity DOI Open Access

Qiaorun Ma,

Xun Meng,

Hongtao Shi

et al.

Polymers, Journal Year: 2025, Volume and Issue: 17(8), P. 1006 - 1006

Published: April 8, 2025

The high-value utilization of enzymatic hydrolysis lignin (EHL) is essential for promoting the development biorefinery industry. This study investigated enhancement antioxidant activity and ultraviolet (UV) absorption capacity EHL through treatment with choline chloride (ChCl)-based acidic deep eutectic solvents (DESs). yield, chemical structure, UV properties, activity, thermal stability degraded regenerated (DEHL) were analyzed. results indicated that DESs effectively preserved aromatic structure EHL. Compared to untreated EHL, DEHL exhibited an increased O/C atomic ratio, a decreased transmittance, significant reduction in weight-average molecular weight (Mw), notable increase phenolic hydroxyl (ArOH) content. Notably, treated ChCl–p-toluenesulfonic acid had lowest Mw (1586 g/mol) highest ArOH Except ChCl–malic ChCl–acetic systems, all other five DES treatments enhanced varying degrees. Among them, IC50 DPPH value 262.87 μg/mL.

Language: Английский

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