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Correlations of the physicochemical properties of organosolv lignins from Broussonetia papyrifera with their antioxidant activities

Journal Article · · Sustainable Energy & Fuels
DOI:https://doi.org/10.1039/d0se00940g· OSTI ID:1671394
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [8];  [2];  [9]
  1. Hubei Univ. of Technology, Wuhan (China). Key Lab. of Fermentation Engineering; Univ. of Tennessee, Knoxville, TN (United States)
  2. Hubei Univ. of Technology, Wuhan (China). Hubei Provincial Key Lab. of Green Materials for Light Industry
  3. State Univ. of New York (SUNY), Syracuse, NY (United States)
  4. Nanjing Agricultural Univ., Nanjing (China)
  5. Univ. of Tennessee, Knoxville, TN (United States)
  6. Hubei Univ. of Technology, Wuhan (China). Key Lab. of Fermentation Engineering
  7. Univ. of Tennessee, Knoxville, TN (United States). Center for Renewable Carbon, Inst. of Agriculture; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Joint Inst. for Biological Sciences, Biosciences Division
  8. Tobacco Research Inst. of Hubei Province, Wuhan (China)
  9. Hubei Univ. of Technology, Wuhan (China). Key Lab. of Fermentation Engineering
+ Show Author Affiliations

To understand the influence of lignin characteristics on their antioxidant activities, lignins were isolated from Broussonetia papyrifera by organosolv pretreatment at different temperatures. The physicochemical features of the lignins were investigated by GPC, 31P NMR and 2D HSQC NMR analyses. An increase of organosolv pretreatment temperature resulted in a decrease of Mw and an increase of the phenolic hydroxyl group content in the isolated lignin. The lignins extracted at higher organosolv pretreatment temperature showed higher antioxidant activity according to the IC50 determined using DPPH and ABTS. The correlations between the physicochemical properties of organosolv lignins and their antioxidant activities were studied. The contents of phenolic hydroxyl groups, especially syringyl and guaiacyl, and double bonds in the Cα position had positive effects on the antioxidant activity of the lignins. Finally, on the other hand, Mw and aliphatic hydroxyl groups of the lignins exhibited negative correlations with the antioxidant activity.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; National Natural Science Foundation of China (NNSFC); China Scholarship Council; Natural Science Foundation of Hubei Provincial Department of Education
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1671394
Journal Information:
Sustainable Energy & Fuels, Journal Name: Sustainable Energy & Fuels Journal Issue: 10 Vol. 4; ISSN 2398-4902
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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09 BIOMASS FUELS