Innovative use of fluorescent grafting for damage and morphological monitoring during the extrusion process of PCL-flax fibre-reinforced composites
2024
Bourmaud, Alain | Rudolph, Anton Loïc | Habrant, Anouck | Müssig, Jörg | Paës, Gabriel | Graupner, Nina | Institut de Recherche Dupuy de Lôme (IRDL) ; École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Centre National de la Recherche Scientifique (CNRS) | Fractionnement des AgroRessources et Environnement (FARE) ; Université de Reims Champagne-Ardenne (URCA)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Hochschule Bremen (HSB) ; University of Applied Sciences | French National Institute for Agricultural, Food and Environment Research (INRAE) and Transform division
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Show more [+] Less [-]English. Limiting plant fibre damage during industrial processing is challenging for biobased composite development due to plant cell wall sensitivity to temperature and shear. This study developed an innovative fluorophore grafting method to indirectly monitor flax fibre morphological damage during twin-screw extrusion in a poly-(caprolactone) matrix. Results showed the fluorophore was strongly degraded after severe process conditions, with-87.1 % and-72.2 % changes in fluorescence intensity at 240 degrees C and 300 rotations per minute, respectively, compared to native fluorescence. The fluorescence intensity correlated well with the fibre aspect ratio and length, making it a reliable indicator of the fibre's morphology degradation.
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