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Chitosan as a coupling agent for phosphate glass fibre/polycaprolactone composites

Tan, Chao; Rudd, Chris; Parsons, Andrew J.; Sharmin, Nusrat; Zhang, Junxiao; Chen, Wanru; Ahmed, Ifty


Chao Tan

Chris Rudd

Nusrat Sharmin

Junxiao Zhang

Wanru Chen


This study shows that chitosan (CS) could be highly useful as a coupling agent in phosphate glass fibre/polycaprolactone (PGF/PCL) composites, as it improved the interfacial shear strength by up to 78%. PGFs of composition 45P2O5-5B2O3-5Na2O-24CaO-10MgO-11Fe2O3 were dip-coated with CS (with a degree of deacetylation >80%) dissolved in acetic acid solution (2% v/v). Different CS concentrations (3-9 g L -1) and coating processes were investigated. Tensile and fragmentation tests were conducted to obtain mechanical properties of the single fibres and interfacial properties of the PGF/PCL composites, respectively. It was observed that " post-cleaning " the treated fibres reduced their tensile strength by around 20%, however the CS coated fibres saw strength increases of up to 1.1-11.5%. TGA and SEM analyses were used to confirm the presence of CS on the fibre surface. FTIR, Raman and XPS analyses further confirmed the presence of CS and indicated the protonation of CS amine groups. Moreover, the nitrogen spectrum of XPS demonstrated a minimum threshold of CS coating required to provide an improved interface.


Tan, C., Rudd, C., Parsons, A. J., Sharmin, N., Zhang, J., Chen, W., & Ahmed, I. (2018). Chitosan as a coupling agent for phosphate glass fibre/polycaprolactone composites. Fibers, 6(4),

Journal Article Type Article
Acceptance Date Nov 30, 2018
Online Publication Date Dec 10, 2018
Publication Date Dec 10, 2018
Deposit Date Dec 3, 2018
Publicly Available Date Dec 3, 2018
Journal Fibers
Electronic ISSN 2079-6439
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 6
Issue 4
Article Number 97
Keywords chitosan; coupling agent; phosphate glass fibre; polycaprolactone (PCL) composite
Public URL
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