Antioxidant Activity of Organosolv Lignin Degraded Using SO42-/ZrO2 as Catalyst

Organosolv lignin degradation was carried out through hydrogenolysis routes with SO42-/ZrO2 as the catalyst. Structural characterization and antioxidant activity of organosolv lignin samples were investigated; the antioxidant activity of the organosolv lignin was compared with that of soda lignin. R...

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Bibliographic Details
Published inBioresources Vol. 10; no. 4; pp. 6819 - 6829
Main Authors Zhang, Shengming, Zhang, Yan, Liu, Liang, Fang, Guizhen
Format Journal Article
LanguageEnglish
Published North Carolina State University 01.11.2015
Subjects
Antioxidant
Degradation
Hydrogenolysis
Organosolv lignin
SO42-/ZrO2
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Summary:Organosolv lignin degradation was carried out through hydrogenolysis routes with SO42-/ZrO2 as the catalyst. Structural characterization and antioxidant activity of organosolv lignin samples were investigated; the antioxidant activity of the organosolv lignin was compared with that of soda lignin. Results showed that the active functional groups contents of organosolv lignin were increased, and the antioxidant activity of organosolv lignin was improved. The total hydroxyl and phenolic hydroxyl group contents of organosolv lignin were increased by 15.81% and 26.55%, respectively, and the Mw was decreased from 5739 g/mol to 4499 g/mol. The IC50 of organosolv lignin on DPPH radicals scavenging rate, ABTS+ radicals scavenging rate, and reducing power were decreased by 18.91%, 18.08%, and 8.48%, respectively. The catalyzed organosolv lignin can be used as a natural antioxidant for functional food or in cosmetic and polymeric materials.
ISSN:1930-2126
1930-2126
DOI:10.15376/biores.10.4.6819-6829