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Article

Structural and Thermal Characterization of Novel Organosolv Lignins from Wood and Herbaceous Sources

1
Bernal Center, University of Limerick, V94 T9PX Castletroy, Ireland
2
Department of Pharmacy, University of Naples ’Federico II’, 80131 Naples, Italy
3
SINTEF Industry, Richard Birkelands vei 2B, 7034 Trondheim, Norway
4
Department of Molecular Science and Nanosystems, University of Venice Ca’ Foscari, Via Torino 155, 30170 Venice Mestre, Italy
5
Biochemical Process Engineering, Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, 97187 Luleå, Sweden
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Processes 2020, 8(7), 860; https://doi.org/10.3390/pr8070860
Received: 26 June 2020 / Revised: 11 July 2020 / Accepted: 13 July 2020 / Published: 17 July 2020
This study demonstrates the effects of structural variations of lignins isolated via an organosolv process from different woody and herbaceous feedstocks on their thermal stability profiles. The organosolv lignins were first analysed for impurities, and structural features were determined using the default set of gel permeation chromatography, FT-IR spectroscopy, quantitative 31 P NMR spectroscopy and semi-quantitative 1 H- 13 C HSQC analysis. Pyrolysis-, O 2 - and CO 2 -reactivity of the organosolv lignins were investigated by thermogravimetric analysis (TGA), and volatile formation in various heating cycles was mapped by head-space GC-MS analysis. Revealed reactivities were correlated to the presence of identified impurities and structural features typical for the organosolv lignins. Data suggest that thermogravimetric analysis can eventually be used to delineate a lignin character when basic information regarding its isolation method is available. View Full-Text
Keywords: lignin; organosolv fractionation; TGA; 31P NMR; HSQC; heat treatment lignin; organosolv fractionation; TGA; 31P NMR; HSQC; heat treatment
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MDPI and ACS Style

Trubetskaya, A.; Lange, H.; Wittgens, B.; Brunsvik, A.; Crestini, C.; Rova, U.; Christakopoulos, P.; Leahy, J.J.; Matsakas, L. Structural and Thermal Characterization of Novel Organosolv Lignins from Wood and Herbaceous Sources. Processes 2020, 8, 860. https://doi.org/10.3390/pr8070860

AMA Style

Trubetskaya A, Lange H, Wittgens B, Brunsvik A, Crestini C, Rova U, Christakopoulos P, Leahy JJ, Matsakas L. Structural and Thermal Characterization of Novel Organosolv Lignins from Wood and Herbaceous Sources. Processes. 2020; 8(7):860. https://doi.org/10.3390/pr8070860

Chicago/Turabian Style

Trubetskaya, Anna, Heiko Lange, Bernd Wittgens, Anders Brunsvik, Claudia Crestini, Ulrika Rova, Paul Christakopoulos, J. J. Leahy, and Leonidas Matsakas. 2020. "Structural and Thermal Characterization of Novel Organosolv Lignins from Wood and Herbaceous Sources" Processes 8, no. 7: 860. https://doi.org/10.3390/pr8070860

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