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Title: A study of poplar organosolv lignin after melt rheology treatment as carbon fiber precursors

Journal Article · · Green Chemistry
DOI:https://doi.org/10.1039/C6GC00977H· OSTI ID:1319236
 [1];  [2];  [3];  [4];  [4];  [3];  [4];  [4];  [3];  [3];  [3];  [3];  [5]
  1. Georgia Institute of Technology, Atlanta, GA (United States); Univ. of Tennessee, Knoxville, TN (United States)
  2. Georgia Institute of Technology, Atlanta, GA (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Univ. of Tennessee Institute of Agriculture, Knoxville, TN (United States)
  5. Georgia Inst. of Technology, Atlanta, GA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)

Lignins from various poplar genotypes were isolated by using organosolv fractionation and subjected to rheological treatment at various temperatures. Physicochemical characterization of the lignin variants shows a broad distribution of glass transition temperatures, melt viscosity, and pyrolysis char residues. Rheological treatment at 170 °C induces lignin repolymerization accompanied with an increase in condensed linkages, molecular weights, and viscosities. In contrast, rheology testing at 190 °C results in the decrease in lignin aliphatic and phenolic hydroxyl groups, β-O-aryl ether linkages, molecular weights, and viscosity values. Lignin under air cooling generates more oxygenated and condensed compounds, but lower amounts of ether linkages than lignin cooled under nitrogen. Here, lignin with a lower syringyl/guaiacyl ratio tends to form more cross-linkages along with higher viscosity values, higher molecular weight and larger amounts of condensed bonds.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). BioEnergy Science Center (BESC)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1319236
Journal Information:
Green Chemistry, Journal Name: Green Chemistry; ISSN 1463-9262
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 77 works
Citation information provided by
Web of Science

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Cited By (8)

Thermal treatment of pyrolytic lignin and polyethylene terephthalate toward carbon fiber production journal July 2020
High value‐added monomer chemicals and functional bio‐based materials derived from polymeric components of lignocellulose by organosolv fractionation journal November 2019
A Solvent-Free Synthesis of Lignin-Derived Renewable Carbon with Tunable Porosity for Supercapacitor Electrodes journal July 2018
Bioethanol from Lignocellulosic Biomass book January 2017
Bioethanol from Lignocellulosic Biomass book July 2018
Influence of Aromatic Structure on the Thermal Behaviour of Lignin journal January 2019
Binder free carbon nanofiber electrodes derived from polyacrylonitrile-lignin blends for high performance supercapacitors journal June 2019
Structural changes in lignocellulosic biomass during activation with ionic liquids comprising 3-methylimidazolium cations and carboxylate anions journal September 2018

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