A1 Journal article (refereed), original research

Lignin as a functional additive in a biocomposite: Influence on mechanical properties of polylactic acid composites

Open Access publication

Publication Details
Authors: Anugwom Ikenna, Lahtela Ville, Kallioinen Mari, Kärki Timo
Publisher: Elsevier
Publication year: 2019
Language: English
Journal acronym: j.indcrop
Volume number: 140
ISSN: 0926-6690
eISSN: 1872-633X
JUFO-Level of this publication: 2
Permanent website address: www.elsevier.com/locate/indcrop
Open Access: Open Access publication
Location of the parallel saved publication: http://urn.fi/URN:NBN:fi-fe2019090226290


In this research, lignin and modified lignin were used as a biobased additive in the manufacturing of biocomposites. The biocomposites were produced from polylactic acid (PLA) and wood. Lignin used in this study was recovered both from spruce and from construction and demolition waste (CDW) by extracting it with a deep eutectic solvent (DES), and part of the recovered lignin was modified in esterification with maleic anhydride. The implementation of lignins on biobased composites in filament extrusion was tested and the influence of lignin on the composite manufacturing process and mechanical characteristics of the produced biocomposites was evaluated and discussed. The results showed that lignin compounds can be used as a part of biocomposites based on PLA and wood material, because the lowest tensile strength was achieved with samples which did not contain any commercial coupling agent compounds. Lignin was found to act in the biocomposites more as a coupling agent than as a lubricant, and the coupling agent strength effect of esterified lignin was comparable to the commercial coupling agent used in these experiments. The best specific tensile strength of filaments achieved in this study were 7.68 and 7.71 MPa for materials that included commercial coupling agent and esterified lignin, respectively.

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Last updated on 2020-20-03 at 10:03