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Humins from Biorefineries as Thermoreactive Macromolecular Systems
Author(s) -
Sangregorio Anna,
Guigo Nathanael,
van der Waal Jan C.,
Sbirrazzuoli Nicolas
Publication year - 2018
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201802066
Subject(s) - humin , biomass (ecology) , chemistry , chemical engineering , materials science , pulp and paper industry , organic chemistry , polymer science , agronomy , engineering , fertilizer , humic acid , biology
Conversion of lignocellulosic biomass often brings about the formation of several side products. Among these, a black and viscous coproduct known as humins is formed on acidic treatment of polysaccharides. To improve the efficiency of this process from an economical and environmental perspective, new solutions for humins valorization are urgently needed. This work focuses on the comprehensive understanding of humins with special emphasis on their structure/properties relationships. Humins were subjected to different thermal treatments and characterized by means of structural, thermoanalytical, and rheological investigations. The structure and composition of humins are very diverse and depend on the thermochemical conditions. On sufficient heating, humins change into a nonreversible and more branched furanic structure with a relatively high glass‐transition temperature ( T g >65 °C). Thus, humins can be easily processed for preparing thermoset‐like resins.