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

Digital Object Identifier (DOI): http://dx.doi.org/10.1016/j.indcrop.2019.111704

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


Abstract

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.


LUT Focus Areas

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