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Lignin: A biopolymer from forestry biomass for biocomposites and 3D printing
RISE - Research Institutes of Sweden, Bioeconomy, PFI.ORCID iD: 0000-0003-0140-1693
Universidad de Córdoba, Spain.
Universidad de Córdoba, Spain.
RISE - Research Institutes of Sweden, Bioeconomy, PFI.ORCID iD: 0000-0002-6183-2017
2019 (English)In: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 12, no 18, article id 3006Article in journal (Refereed) Published
Abstract [en]

Biopolymers from forestry biomass are promising for the sustainable development of new biobased materials. As such, lignin and fiber-based biocomposites are plausible renewable alternatives to petrochemical-based products. In this study, we have obtained lignin from Spruce biomass through a soda pulping process. The lignin was used for manufacturing biocomposite filaments containing 20% and 40% lignin and using polylactic acid (PLA) as matrix material. Dogbones for mechanical testing were 3D printed by fused deposition modelling. The lignin and the corresponding biocomposites were characterized in detail, including thermo-gravimetric analysis (TGA), differential scanning calorimetry (DSC), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction analysis (XRD), antioxidant capacity, mechanical properties, and scanning electron microscopy (SEM). Although lignin led to a reduction of the tensile strength and modulus, the reduction could be counteracted to some extent by adjusting the 3D printing temperature. The results showed that lignin acted as a nucleating agent and thus led to further crystallization of PLA. The radical scavenging activity of the biocomposites increased to roughly 50% antioxidant potential/cm2, for the biocomposite containing 40 wt % lignin. The results demonstrate the potential of lignin as a component in biocomposite materials, which we show are adequate for 3D printing operations. © 2019 by the authors.

Place, publisher, year, edition, pages
MDPI AG , 2019. Vol. 12, no 18, article id 3006
Keywords [en]
3D printing, Biocomposites, Biopolymers, Lignin, Polylactic acid (PLA), Antioxidants, Biomass, Biomolecules, Composite materials, Differential scanning calorimetry, Forestry, Fourier transform infrared spectroscopy, Fused Deposition Modeling, Gravimetric analysis, Mechanical testing, Petrochemicals, Polyesters, Scanning electron microscopy, Tensile strength, Thermogravimetric analysis, Timber, X ray powder diffraction, 3-D printing, Antioxidant capacity, Antioxidant potential, Bio-composites, Biocomposite materials, Fused deposition modelling, Poly lactic acid, Radical scavenging activity
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-39986DOI: 10.3390/ma12183006OAI: oai:DiVA.org:ri-39986DiVA, id: diva2:1359533
Note

 Funding details: 282310; Funding details: FPU14/02278; Funding details: Population Foundation of India, PFI; Funding details: CA17128; Funding details: Ministerio de Ciencia e Innovación, MICINN, CTQ2016-78729-R; Funding text 1: Johnny Kvakland Melb?, Kenneth Aasar?d, Ingebj?rg Leirset and Cornelis van derWijst at RISE PFI are acknowledged for valuable assistance in the laboratory work. Part of this work was funded by the Research Council of Norway through the ALLOC project (grant 282310). The authors thank the COST Action LignoCOST (CA17128) for funding the short-term scientific mission of E.E. at RISE PFI and Spain's DGICyT, MICINN for supporting this research within the framework of the Projects CTQ2016-78729-R and the Spanish Ministry of Science and Education through the National Program FPU (Grant Number FPU14/02278).

Available from: 2019-10-09 Created: 2019-10-09 Last updated: 2019-10-09Bibliographically approved

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