Interfacial performance of chemically recycled carbon fibres assessed by microdroplet debonding tests
Abstract
The reuse of recycled carbon fibres in structural composites requires understanding how recycling processes affect fibre/matrix interfacial properties. In this study, the interfacial behaviour of carbon fibres recovered from a recyclable epoxy/PHU composite through a mild chemical recycling process was investigated using microdroplet debonding tests. The interfacial shear strength (IFSS) of recycled fibres was compared with that of virgin fibres. Despite modifications of the fibre surface induced by recycling, including partial removal of the initial sizing and the presence of localized residual species, recycled fibres exhibited an IFSS comparable to that of virgin fibres. Post-debonding SEM observations revealed distinct local failure mechanisms, highlighting the heterogeneous nature of the recycled fibre interface. These results provide new insights into the interfacial behaviour of recycled carbon fibres and demonstrate that chemical recycling can enable the reuse of carbon fibres without compromising fibre/matrix adhesion or requiring additional sizing.
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BibTeX
@article{boutenel2026interfacial,
title = {{Interfacial performance of chemically recycled carbon fibres assessed by microdroplet debonding tests}},
author = {Florian Boutenel and Adam Leveziel and Teddy Mebarki and Guillem Seychal and Sébastien Thibaud and Vincent Placet and Xavier Gabrion},
journal = {Composites Communications},
year = {2026},
month = oct,
doi = {10.1016/j.coco.2026.102969},
url = {https://hal.science/hal-05844865v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Interfacial performance of chemically recycled carbon fibres assessed by microdroplet debonding tests
AU - Florian Boutenel
AU - Adam Leveziel
AU - Teddy Mebarki
AU - Guillem Seychal
AU - Sébastien Thibaud
AU - Vincent Placet
AU - Xavier Gabrion
PY - 2026
DA - 2026/10/23
JO - Composites Communications
DO - 10.1016/j.coco.2026.102969
UR - https://hal.science/hal-05844865v1
AB - The reuse of recycled carbon fibres in structural composites requires understanding how recycling processes affect fibre/matrix interfacial properties. In this study, the interfacial behaviour of carbon fibres recovered from a recyclable epoxy/PHU composite through a mild chemical recycling process was investigated using microdroplet debonding tests. The interfacial shear strength (IFSS) of recycled fibres was compared with that of virgin fibres. Despite modifications of the fibre surface induced by recycling, including partial removal of the initial sizing and the presence of localized residual species, recycled fibres exhibited an IFSS comparable to that of virgin fibres. Post-debonding SEM observations revealed distinct local failure mechanisms, highlighting the heterogeneous nature of the recycled fibre interface. These results provide new insights into the interfacial behaviour of recycled carbon fibres and demonstrate that chemical recycling can enable the reuse of carbon fibres without compromising fibre/matrix adhesion or requiring additional sizing.
SN - 2452-2139
ER -