Formulations de composites thermoplastiques à partir de fibres de carbone recyclées par vapo-thermolyse

Abstract : World need in carbon fibre grew from 18,000 tons per year in 2001 to 48,000 tons in 2013. With the increasing amount of composite waste and the recent French or European legislation focus towards a sustainable waste management, carbon fibre composites recycling offers interesting economic and environmental perspectives. This project aims at enabling the manufacturing of thermoplastic composites from recycled carbon fibres. To reach this goal, PAN-based carbon fibres were recycled from epoxy resin/carbon fibre composites by steam-thermolysis. It is a thermochemical process using superheated steam at environmental pressure to degrade the organic matrix of composites and thus to recover carbon fibres. Reclaimed carbon fibres were first studied so as to show that the steam-thermal process is particularly efficient to degrade the epoxy resin of composites while maintaining fibres mechanical properties. Two kinds of composites were then considered: short-fibre reinforced compounds for injection and randomly-oriented fibre mat reinforced thermoplastics. Their mechanical properties were studied and results show that mechanical performances of recycled carbon fibre-based composites are similar to those of virgin carbon fibre-based composites. Steam-thermolysis recycled carbon fibre is a competitive fibre while being used as reinforcement for short fibre reinforced thermoplastics.
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Maxime Boulanghien. Formulations de composites thermoplastiques à partir de fibres de carbone recyclées par vapo-thermolyse. Mécanique des matériaux [physics.class-ph]. Ecole des Mines d'Albi-Carmaux, 2014. Français. ⟨NNT : 2014EMAC0020⟩. ⟨tel-01726974⟩

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