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| Le Duigou, Antoine; Pillin, Isabelle; Bourmaud, Alain; Davies, Peter; Baley, Christophe. |
| The biocompostability of natural fibre-reinforced biopolymers, also known as biocomposites, makes them an attractive alternative to glass fibre-reinforced petrochemical polymers. The aim of this work is to study the capacity of flax/PLLA (poly(L-lactide)) biocomposite (20% and 30% fibres by weight) to be recycled. Mechanical properties were evaluated initially, and shown to be similar to those of glass/PP and superior to hemp/PP and sisal/PP composites. Then after repeated injection cycles tensile properties were shown to be conserved until the third cycle. Matrix degradation and fibre aspect ratio were followed using molecular weight measurements, thermal and rheological analyses, image analysis of sections and SEM fractography. These techniques revealed... |
| Tipo: Text |
Palavras-chave: Mechanical properties; Recycling; Flax fibres; PLLA. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-6360.pdf |
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| Le Duigou, Antoine; Davies, Peter; Baley, Christophe. |
| The influence of wet aging on the behaviour of flax/epoxy micro-composites composed of single flax fibres embedded in epoxy micro-droplets has been studied. Interfacial shear strength has been examined by debonding the micro-droplets. The apparent interfacial shear strength decreases with immersion time in water, dropping rapidly during the first 15 min of immersion then stabilizing. Drying samples after short immersion periods allows recovery of properties, indicating a plasticization mechanism. For longer immersion times irreversible degradation is observed. Scanning electron microscopy reveals fibre surface peeling, indicating that an internal interface within the fibre is weaker than the fibre/matrix interface after aging. A simple descriptive model... |
| Tipo: Text |
Palavras-chave: Flax fibres; Environmental degradation; Fibre/matrix bond. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00137/24829/23101.pdf |
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| Le Duigou, Antoine; Merotte, Justin; Bourmaud, Alain; Davies, Peter; Belhouli, Karim; Baley, Christophe. |
| The present article aims to investigate the contribution of hygroscopic expansion of flax fibres to interfacial radial stresses and Interfacial Shear Strength (IFSS) of Maleic Anhydride grafted PolyPropylene (MAPP)/Flax biocomposites. During manufacturing of thermoplastic biocomposites and storage at 50% RH, a weight variation is observed, attributed to water content evolution within plant cell-walls. The hygroscopic radial expansion coefficient βr flax of single flax fibres estimated by Environmental Scanning Electron Microscopy (ESEM) observation is many orders of magnitude higher (βf,R = 1.14 ε/Δm) than thermal expansion (αf, R = 78 10−6 ε/°C). Thus, its contribution to the development of residual stresses σrad during processing should be prevalent. A... |
| Tipo: Text |
Palavras-chave: Flax fibres; Fibre/matrix bond. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00397/50830/51594.pdf |
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