08 August 2021

Most CFRPs used in high performance applications, consist of a thermoset polymer as matrix, such as epoxy resin. Thermosets have the ability to form cross-links, that offer the needed stability and performance. However, due to their cross-linking nature, their recycling and therefore, the reclamation of their reinforcement states a big challenge, as these matrices cannot be reshaped and remoulded, as thermoplastics do.

NTUA in collaboration with INEGI and DALLARA has achieved, through pyrolysis process, the reclamation of carbon fibre reinforcements from two different CFRPs. One with UD fibres and one with woven fabric reinforcement.

However, pyrolysis process leaves residue from the thermal decomposition of the matrix, such as oils, wax and amorphous carbon. Another challenge that must be addressed, and primitive goal in the thermoset CFRPs recycling, is the maintenance of the mechanical properties of the recycled fibres.

Therefore, further investigation must be performed in order to acquire reinforcement clean from residue and to able to maintain their properties.

Figure 4: Reclamation from UD composite
Figure 5: Reclamation from woven fabric composite