Valorization of Kraft Lignin and Corn Cob by-Products into PLA-Matrix based Biocomposites: Characterisation of Injected-moulded Specimens

Amelie Tribot, Hélène de Baynast, Cédric Delattre, Philippe Michaud, Claude-Gilles Dussap

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

Abstract

The goal of this exploratory work was to evaluate the influence of two industrial by-products - Kraft lignin from forestry sector, and corn cobs from the French agricultural sector - on biocomposites properties. Several blends involving Kraft lignin and/or corn cob in a PLA matrix were compounded within Valagro Recherche French company. By incorporating 20 % (w/w) of by-products into a PLA matrix, the price of the developed biocomposites is expected to be lower than a PLA-made product. Granulates were injected for further characterizations such as flexural mechanical properties, hardness, thermal properties, surface tension, FT-IR spectroscopy, and density. Incorporation of corn cob and Kraft lignin increased flexural modulus of biocomposites to 3.7 GPa. Flexural strength was not drastically impacted since values ranged around 70 –
85 MPa. It was also observed an increase of biocomposites hardness with Kraft lignin rather than corn cob. DSC thermograms did not reveal any influence of the by-products on glass transition temperature of PLA.
The present product is a thermoplastic material, entirely bio-based, biodegradable, and it was obtained from simple formulation without any use of harmful solvent.
Original languageEnglish
Title of host publicationProceedings of the Biocomposites Conference Cologne (BCC) 2019
Publication statusPublished - 2019
MoE publication typeNot Eligible
Event8th Biocomposites Conference - Cologne, Germany
Duration: 14 Nov 201915 Nov 2019

Conference

Conference8th Biocomposites Conference
CountryGermany
CityCologne
Period14/11/1915/11/19

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