Hierarchical thermoplastic biocomposites reinforced with flax fibres modified by xyloglucan and cellulose nanocrystals

This work is focused on the modification of the interphase zone in short flax fibres / polypropylene (PP) composites by a bio-inspired modification of fibres called “nanostructuration” that uses the adsorption of biomass by-products, i.e. cellulose nanocrystals (CNC) and xyloglucan (XG), to create h...

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Bibliographic Details
Published in:Carbohydrate polymers 2021-02, Vol.254, p.117403, Article 117403
Main Authors: Doineau, Estelle, Coqueugniot, Guillaume, Pucci, Monica Francesca, Caro, Anne-Sophie, Cathala, Bernard, Bénézet, Jean-Charles, Bras, Julien, Le Moigne, Nicolas
Format: Article
Language:English
Subjects:
Adhesives - chemistry
Adsorption
Cellulose - chemistry
Cellulose nanocrystals
Chemical Sciences
Engineering Sciences
Flax - chemistry
Flax fibres
Glucans - chemistry
Hierarchical interphase
Hot Temperature
Materials
Nanocomposites - chemistry
Nanoparticles - chemistry
Polymers
Polypropylenes - chemistry
Tensile Strength
Water - chemistry
Wettability
Xylans - chemistry
Xyloglucan
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Summary:This work is focused on the modification of the interphase zone in short flax fibres / polypropylene (PP) composites by a bio-inspired modification of fibres called “nanostructuration” that uses the adsorption of biomass by-products, i.e. cellulose nanocrystals (CNC) and xyloglucan (XG), to create hierarchical flax fibres. The wettability and interfacial adhesion study reveals a strong decrease in the polar character of CNC modified flax fibres, hence increasing the work of adhesion with PP. Moreover, combining XG/CNC modified interphases with MAPP coupling agent enhances the ultimate mechanical properties of biocomposites with higher tensile strength and work of rupture, and modifies failure mechanisms as revealed by in situ micro-mechanical tensile SEM experiments. Bio-based hierarchical composites inspired by naturally occurring nanostructures open a new path for the development of sustainable composites with enhanced structural properties.
ISSN:0144-8617
1879-1344
DOI:10.1016/j.carbpol.2020.117403