Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/105382
Title: Enhancing Lignin Dissolution and Extraction: The Effect of Surfactants
Authors: Melro, Elodie 
Valente, Artur J. M. 
Antunes, Filipe E. 
Romano, Anabela
Medronho, Bruno 
Keywords: dissolution; extraction; lignin; lignocellulosic waste; maritime pine; surfactants
Issue Date: 2021
Publisher: MDPI
Project: PTDC/AGR-TEC/4814/2014 
PTDC/ASP-SIL/30619/2017 
UIDB/05183/2020 
researcher grant CEECIND/01014/2018 
PhD grant SFRH/BD/132835/2017 
UID/QUI/00313/2020 
Serial title, monograph or event: Polymers
Volume: 13
Issue: 5
Abstract: The dissolution and extraction of lignin from biomass represents a great challenge due to the complex structure of this natural phenolic biopolymer. In this work, several surfactants (i.e., non-ionic, anionic, and cationic) were used as additives to enhance the dissolution efficiency of model lignin (kraft) and to boost lignin extraction from pine sawdust residues. To the best of our knowledge, cationic surfactants have never been systematically used for lignin dissolution. It was found that ca. 20 wt.% of kraft lignin is completely solubilized using 1 mol L􀀀1 octyltrimethylammonium bromide aqueous solution. A remarkable dissolution efficiency was also obtained using 0.5 mol L􀀀1 polysorbate 20. Furthermore, all surfactants used increased the lignin extraction with formic acid, even at low concentrations, such as 0.01 and 0.1 mol L􀀀1. Higher concentrations of cationic surfactants improve the extraction yield but the purity of extracted lignin decreases.
URI: https://hdl.handle.net/10316/105382
ISSN: 2073-4360
DOI: 10.3390/polym13050714
Rights: openAccess
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais

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