Title:
Liquefied Wood - Advanced Characterization of Lignin-Based Polymer
Author(s):
Jasiukaitytė, E. , Kunaver, M., Crestini, C.
Document(s):
Paper
Abstract:
The object of our present work was a comprehensive characterization of the liquefied wood that could be used as a feedstock for the welldefined polymer synthesis. Beside the determination of overall hydroxyl value that was found to be dependent on time, the chemical characterization of liquefied wood samples was carried out by quantitative 31P, 13C NMR analysis and by monitoring the change of molar masses using sizeexclusion chromatography. Liquefied wood samples for analysis were prepared using a specific isolation procedure which enabled the separation of highmolecular mass material (ligninbased polymer LBP) from lowmolecular mass glycol fraction. The final LBP was produced by predominant condensation reactions between the aromatic lignin subunits as indicated by the decrease in total phenolic hydroxyl group content followed by the incorporation of the glycerol and diethylene glycol moieties. The identification and quantification of the various reactive hydroxyl groups in the LBP opens a possibility of the welldefined polymer synthesis from renewable resources. Moreover, the molecular mass and the hydroxyl group content of liquefaction product could be monitored by the duration of the liquefaction process and by the use of the particular alcohols.
Keywords:
biomass to liquid (BtL), biopolymers, characterization, lignin, wood
Topic:
Biomass Chemistry
Subtopic:
Emerging technologies for biomass use
Event:
18th European Biomass Conference and Exhibition
Session:
OB7.2
Pages:
1449 - 1453
ISBN-13:
978-88-89407-56-1
ISBN-10:
88-89407-56-5
Paper DOI:
10.5071/18thEUBCE2010-OB7.2
Price:
FREE