Glass Fibre Composites Recycling and Sustainability
topic
Recycling challenges: glass fibre composites are non-biodegradable, thermoset matrix prevents remelting. Methods: mechanical grinding (reclaimed fibres 0.1-10 mm for filler applications with 70-90% strength loss), pyrolysis (500-700°C recovering fibres with 50% strength retention), fluidized bed (450-550°C with better fibre recovery), chemical recycling (solvolysis in superheated water or solvents), and emerging technologies (microwave-assisted pyrolysis). Embodied energy: 15-20 MJ/kg (vs. carbon 200-600 MJ/kg).
Role
End-of-life management of glass fibre composites (wind blades, automotive parts) is critical sustainability challenge with 2-4 million tonnes annual waste by 2030, driving innovation in recycling technology and design for disassembly.
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