RT Journal Article
T1 Biorefinery of paulownia by autohydrolysis and soda-anthraquinone delignification process : characterization and application of lignin
A1 Zamudio Aguilar, Minerva Ana María
A1 Alfaro Martínez, Ascensión
A1 Alva Salazar, Hugo Eduardo de
A1 García Domínguez, Juan Carlos
A1 García Morales, Moisés
A1 López Baldovín, Francisco
AB BACKGROUNDLignin is one of the most abundant polymers in nature. Its physical and chemical properties confer it a high potential for various uses including the production of thermoplastic matrices. This work characterized various types of lignin obtained by alkaline delignification of paulownia with soda–anthraquinone. The delignification process was carried out with or without previous autohydrolysis. The products obtained after evaporation or acidification were used to produce polylactic acid–lignin composites.RESULTSSubjecting the raw material to autohydrolysis prior to alkaline delignification provided a spent liquor (black liquor) containing an increased amount of extracted lignin (11.9% more than without autohydrolysis) and possessing a higher calorific value (14 822 kJ kg−1) than in the absence of an autohydrolysis stage. Thermogravimetric analysis revealed a strong impact of the autohydrolysis process, which provided residual delignification fractions containing abundant lignin and no degradation products of polysaccharides or other constituents of the raw material. Mechanical dynamics analysis of composites with lignin contents from 12.5 to 30% revealed an increased elastic (storage) modulus (E').CONCLUSIONSSoda lignin has appropriate interaction with the polylactic acid, which allows it to be used for obtaining a composite with adequate physical strength characteristics.
PB Wiley
SN 0268-2575
SN 1097-4660 (electrónico)
YR 2015
FD 2015
LK http://hdl.handle.net/10272/10272
UL http://hdl.handle.net/10272/10272
LA eng
NO Zamudio, M.A.M., Alfaro Martínez, A., Alva Salazar, H.E., García Domínguez, J.C., García Morales, M.: "Biorefinery of paulownia by autohydrolysis and soda-anthraquinone delignification process : characterization and application of lignin". Journal of Chemical Technology and Biotechnology. Vol. 90, n. 3, págs. 534-532, (2015). ISSN 0268-2575
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026