Sustainable Epoxy Composites with UV Resistance Based on New Kraft Lignin Coatings

Currently, the composite industry is focusing on more environmentally friendly resources in order to generate a new range of biobased materials. In this manuscript, we present a new work using lignocellulosic wastes from the paper industry to incorporate into biobased epoxy systems. The manufactured...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2024-08, Vol.29 (15), p.3697
Main Authors: Seoane-Rivero, Rubén, Ares-Elejoste, Patricia, Gondra, Koldo, Amini, Sara, de Hoyos, Pedro-Luis, Gonzalez-Alriols, Maria
Format: Article
Language:English
Subjects:
Analysis
biobased
Carbon footprint
composite
Composite materials
epoxy
Epoxy resins
Green market
kraft lignin
Lignin
Lignocellulose
Mechanical properties
Molecular weight
Paper industry
Polymers
Raw materials
Spectrum analysis
sustainable
Sustainable materials
UV resistance
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Summary:Currently, the composite industry is focusing on more environmentally friendly resources in order to generate a new range of biobased materials. In this manuscript, we present a new work using lignocellulosic wastes from the paper industry to incorporate into biobased epoxy systems. The manufactured materials were composed of kraft lignin, glass fiber, and a sustainable epoxy system, obtaining a 40% biobased content. Using a vacuum infusion process, we fabricated the composites and analyzed their mechanical and UV resistance properties. The findings reveal a significant correlation between the lignin content and flexural modulus and strength, showing an increase of 69% in the flexural modulus and 134% in the flexural strength with the presence of 5% of lignin content. Moreover, it is necessary to highlight that the presence of synthesized lignin inhibits the UV degradation of the biobased epoxy coating. We propose that the use of lignocellulosic-based wastes could improve the mechanical properties and generate UV resistance in the composite materials.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules29153697