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Functional lignin, and its use in producing blends, copolymers, and self-healing elastomers

Patent ·
OSTI ID:1925091
;
A composition comprising lignin compounds possessing 8-30 (or 5-15 or 8-12) phenyl rings interconnected by ether and alkylene linkages and containing hydroxy and/or methoxy groups attached to said phenyl rings, wherein said composition possesses a glass transition temperature of 80-100° C. (or 95-98° C.) and a degree of substitution (DS) of carboxylic acid groups per phenyl ring of at least 0.5 and a DS of methoxy groups per phenyl ring of no more than 1.2, 1.1, or 1.0, wherein at least 90 wt % of said lignin compounds has a molecular weight within a range of 500-5000 g/mol, 1500-3000 g/mol, or 2000-2500 g/mol and/or wherein the molecular weight distribution of the lignin compounds is characterized by a polydispersity index of 1.0-1.5, 1.0-1.4, or 1.0-1.3, and wherein other lignin compounds not possessing the above characteristics are not present. Methods for producing the lignin extract and lignin copolymers and blends produced therefrom are also described.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-00OR22725
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Number(s):
11,441,035
Application Number:
16/277,020
OSTI ID:
1925091
Country of Publication:
United States
Language:
English

References (9)

Methanol Fractionation of Softwood Kraft Lignin: Impact on the Lignin Properties journal November 2013
A New Class of Renewable Thermoplastics with Extraordinary Performance from Nanostructured Lignin-Elastomers journal March 2016
Fractional Precipitation of Softwood Kraft Lignin: Isolation of Narrow Fractions Common to a Variety of Lignins journal February 2014
Fractionation of Kraft Lignin by Successive Extraction with Organic Solvents. II. Thermal Properties of Kraft Lignin Fractions journal January 1987
Characterization of Fractions Obtained from Two Industrial Softwood Kraft Lignins journal December 2014
Protic Ionic Liquids for Lignin Extraction—A Lignin Characterization Study journal January 2018
A study of poplar organosolv lignin after melt rheology treatment as carbon fiber precursors journal January 2016
Investigations of novel nitrile-based ionic liquids as pre-treatment solvent for extraction of lignin from bamboo biomass journal January 2013
Fractionation of Industrial Softwood Kraft Lignin: Solvent Selection as a Tool for Tailored Material Properties journal February 2016

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