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Title: Fractionation of Organosolv Lignin Using Acetone:Water and Properties of the Obtained Fractions

In this study, lignin fractions with different molecular weight were prepared using a simple and almost green method from switchgrass and pine organosolv lignin. Different proportions of acetone in water, ranging from 30 to 60%, were used for lignin fractionation. A higher concentration of acetone dissolved higher molecular weight fractions of the lignin. Fractionated organosolv lignin showed different molecular weight and functional groups. Higher molecular weight fractions exhibited more aliphatic and less phenolic OH than lower molecular weight fractions. Lower molecular weight fractions lead to more homogeneous structure compared to samples with a higher molecular weight. In conclusion, all fractions showed strong antioxidant activity.
Authors:
ORCiD logo [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Islamic Azad University, Sari (Iran). Department of Wood and Paper Science; Univ. of Tennessee, Knoxville, TN (United States). Department of Chemical and Bimolecular Engineering
  2. Univ. of Tennessee, Knoxville, TN (United States). Department of Chemical and Bimolecular Engineering
  3. North Carolina State Univ., Raleigh, NC (United States). Department of Biology Science
  4. Texas A & M Univ., College Station, TX (United States). Texas A&M Agrilife Synthetic and Systems Biology Innovation Hub
  5. Univ. of Tennessee, Knoxville, TN (United States). Department of Chemical and Bimolecular Engineering and Department of Forestry, Wildlife, and Fisheries; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Joint Institute for Biological Sciences, Biosciences Division
Publication Date:
Grant/Contract Number:
AC05-00OR22725; EE0006112
Type:
Accepted Manuscript
Journal Name:
ACS Sustainable Chemistry & Engineering
Additional Journal Information:
Journal Volume: 5; Journal Issue: 1; Journal ID: ISSN 2168-0485
Publisher:
American Chemical Society (ACS)
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Joint Institute for Biological Sciences (JIBS)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Acetone:water mixture; Antioxidant activity; Lignin fractionation; Molecular weight; Organosolv lignin
OSTI Identifier:
1356962
Alternate Identifier(s):
OSTI ID: 1343546